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920-235 Nortel VPN Gateway Rls.7.0 Configuration and Management

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920-235 exam Dumps Source : Nortel VPN Gateway Rls.7.0 Configuration and Management

Test Code : 920-235
Test name : Nortel VPN Gateway Rls.7.0 Configuration and Management
Vendor name : Nortel
: 62 existent Questions

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Nortel Nortel VPN Gateway Rls.7.0

Nortel Intros VPN Gateway | existent Questions and Pass4sure dumps

SANTA CLARA, Calif. -- Nortel Networks (NYSE:NT)(TSX:NT) these days introduced a complete protection framework supported by course of new items so that it will allow commercial enterprise purchasers to rep rid of the boundaries in their existing communications infrastructure. Nortel Networks comfy mobility framework is designed to enable firms to provide secure, bendy access to multimedia content material in converged networks for cell and faraway users -- from any status and from any device -- whereas positioning corporations to drive dramatically lessen costs.

Nortel Networks new relaxed mobility framework is designed to befriend commerce valued clientele drive as much as a 35 percent reduction of far off access charges, in response to Nortel Networks estimates. The framework provides a simplified security infrastructure that can assist organizations to reduce total cost of ownership by course of eliminating the deserve to install sever solutions. A key factor of here is centralized protection management throughout a total lot of structures, enabling deployment of security policies within the most budget friendly and consistent method.

The digital deepest Networking (VPN) items added as portion of this cozy mobility framework encompass a gateway anticipated to be the business's first to present both at ease Socket Layer (SSL) and internet Protocol safety (IPSec) VPNs from the identical equipment.

also introduced were a hardware respond for you to deliver SSL VPN capabilities to the latest Nortel Networks Contivity cozy IP capabilities Gateway portfolio and VPN gateway items; a new Contivity product that offers IPSec VPNs and firewalls for teleworkers and faraway workplaces; a comfy VPN portal answer; and enhancements to latest items that bring trade-leading security to each wired and instant local enviornment networks.

"presenting a complete, integrated course to managing and enabling comfy faraway entry is essential in ultra-modern cellular environment," stated John Girard, vice president and analysis director, Gartner. "The far flung person must be capable of focal point on their job and never community entry issues to be positive. agencies will advantage if they are capable of exhaust a unique VPN platform to provision either SSL or IPSec with middling interfaces for administration, entry controls and user interface."

"Analog contraptions carried out a Contivity-primarily based VPN respond basically three years ago," talked about Lawrence W. Loh, chief assistance officer, Analog contraptions. "This has been very a success, and in consequence their preparatory implementation of at ease, internet-based entry has extended to a a total lot bigger number of their employees and companions."

"Our workforce has eddy into increasingly greater mobile and we've improved their exhaust of converged purposes, combining voice and records over a unique connection," Loh pointed out. "Nortel Networks cozy mobility strategy is reform on track, because it will integrate IPSec and SSL. it will besides tackle the greater challenge of enforcing a comfy, multimedia-equipped infrastructure throughout the distinctive dimensions of safety, entry, administration and administration."

a portion of Nortel Networks 'One community. a global of option.' commercial enterprise know-how vision, the cozy mobility framework is designed to permit agencies to enhance the effectiveness of their commerce operations without compromising network efficiency or safety, while helping unrestricted mobility of company tourists and faraway users.

"Nortel Networks is familiar with the challenges of remote entry security," talked about Atul Bhatnagar, vice chairman and regular supervisor, commercial enterprise statistics Networks, Nortel Networks. "The beauty of this solution is that it combines managed far flung access, secure digital deepest networks and advanced multimedia verbal exchange functions to convey cozy any place, every time multimedia entry. This strategy is designed to enhance worker productiveness and presents the competencies to defer a greatly-decreased total impregnate of possession for a far off access infrastructure."

Managing a lot of distinctive faraway access strategies, guidelines, valued clientele, updates, patches and VPN options is complicated, lofty priced and time-consuming. Nortel Networks relaxed mobility framework is designed to supply expanded levels of entry and simplify administration without compromising the safety, control and manageability of present VPN deployments.

offering the groundwork of the cozy mobility framework, perquisite here products are the latest additions to the company's safety portfolio:

  • Nortel Networks VPN Gateway 3050 -- The business's first to combine SSL VPN connectivity with IPSec VPNs, this product will provide the best of each worlds in remote entry, enabling conclusion-clients to access the functions they require, regardless of no matter if they are using IPSec or SSL connections. The VPN Gateway 3050 will befriend as much as 1,000 SSL or 500 IPSec tunnels, and dramatically simplifies the security infrastructure by means of having a unique gateway to install and preserve for both styles of entry.
  • Nortel network Contivity 200 VPN swap -- this can construct on the award-winning safety capabilities of the Contivity product line in a kit most trustworthy for teleworkers and faraway places of work. Designed for essential deployment, Contivity 200 will charge-with no anguish give VPNs, firewalls, coverage from denial of carrier assaults and content filtering.
  • Nortel Networks Contivity cozy IP features Gateway Portfolio
  • A hardware better will allow new and latest Contivity items to provide SSL VPNs, for that judgement retaining latest client investments and embellishing Contivity's award-successful IPSec VPN capabilities.
  • Nortel Networks regular far flung entry Portal -- A portal solution with a purpose to assess the most acceptable VPN entry by the exhaust of an SSL or IPSec VPN, reckoning on the situation of the end-person, the security profile established by using the administrator, or the community elements they entry.
  • Nortel Networks VPN customer Administrator -- focused on valued clientele that manage a huge variety of VPN users, the VPN client Administrator will provide seamless automatic distribution of Contivity IPSec customer and policy updates to end-clients. this could rep rid of tangled technical hurdles to holding a cozy VPN infrastructure.
  • Nortel Networks Corp.

    might besides 6-8, 2019, Denver, Colorado may besides 6, 2019, Denver, Colorado September 17-19, 2019, Dallas, Texas October 1, 2019, New Orleans, Louisiana October 2-22, 2019, los angeles, CA October 10, 2019, new york, long island November 5, 2019, London, England November 7, 2019, London, UK December 3-5, 2019, Vienna, Austria December three, 2019, new york, ny All Upcoming live movements

    Nortel extends VPN capabilities | existent Questions and Pass4sure dumps

    Nortel Networks has launched a few items to befriend its new safety framework, which is designed to rep rid of boundaries in current communications infrastructures. The vendor's goal is to allow conclusion users to give at ease, elastic access to multimedia content material in converged networks for both cellular and far off clients through any machine, from any location. additionally, Nortel is asking to power down fees with the aid of reducing the costs of far off consumer access with the aid of up to 35%.Reinforcing this goal is a variety of items together with a digital deepest networking (VPN) gateway that helps each comfy socket layer (SSL) and IPSec VPNs in the identical device. additionally, the Contivity at ease IP capabilities Gateway Portfolio will insert SSL VPN capabilities to the supplier's latest Contivity latitude, whereas the Contivity 200 switch will offer VPNs, firewalls and coverage from denial of provider (DoS) assaults.moreover, Nortel is supplying the time-honored far off access Portal, in an application to assess the most appropriate VPN access for clients, as neatly as the VPN client Administrator, which is designed for agencies with a big variety of VPN users."Nortel Networks is familiar with the challenges of faraway access safety," says Atul Bhatnagar, vp & ordinary supervisor, enterprise records networks, Nortel Networks. "The beauty of this respond is it really is combines managed faraway entry, at ease digital deepest networks and advanced multimedia communique functions to convey cozy any place, every time multimedia entry. This course is designed to boost employee productivity and presents the abilities to defer a drastically reduced complete cost of possession for a faraway entry infrastructure," he continues.

    For the entire newest enterprise intelligence from the UAE and Gulf international locations, comply with us on Twitter and Linkedin, enjoy us on fb and subscribe to their YouTube web page, which is up-to-date each day.

    Nortel uses USB drive to relaxed far off travail | existent Questions and Pass4sure dumps

    Nortel hopes to address the protection of remote travail with an "office on a stick," a USB drive that can hyperlink an worker's computing device with a corporate VPN and hold the entire information from a session encrypted.

    The force itself, akin to a benchmark USB (familiar Serial Bus) pressure with 1G byte or 2G bytes of storage, is only one piece of the Nortel cozy moveable workplace, a product that besides includes a Nortel VPN (digital inner most network) gateway and services to aid organisations installation policies and person permissions.

    As travail becomes more cellular for many companies, IT departments are arising in opposition t the simultaneous growth of privateness laws and issues about records theft. They frequently exhaust software VPNs to maintain far flung travail at ease, however Nortel is aiming to achieve this with out the want for VPN client software or URLs (uniform useful resource locators) that employees should suffer in mind. With the software for a VPN session dwelling on the USB power, users besides can log in from almost any notebook.

    to exhaust the USB stick, employees can effortlessly plug it into a USB port and enter a username and password, referred to Rod Wallace, director of security capabilities and solutions at Nortel. software on the stick first tests the computing device for viruses and required safety mechanisms, after which units up an encrypted remote session. It customarily will give access to far flung purposes by means of the web browser or a further formula. it may possibly completely rob over the gear the usage of a far off computer and obscure off printing, doc-saving and far flung drives, fighting personnel from improperly copying dainty facts.

    The remote session is encrypted and utter facts the worker enters or downloads can rend at once from the laptop's reminiscence onto the encrypted USB pressure, Wallace spoke of. due to this fact, IT directors can know that dainty counsel is rarely out on the earth on PCs they can not control. guidelines will besides be configured in order that clients who plug the drive into less-comfortable PCs rep both confined or no access to functions, he talked about.

    One vicinity the at ease portable workplace has been deployed is with community-based mostly midwives who travail for Liverpool ladies's hospital in England. they can enter and access patient records whereas away from the sanatorium and preserve them inner most, without desiring customer software or complicated log-in procedures, Wallace mentioned.

    The Nortel at ease portable office is purchasable worldwide. For a benchmark commerce deployment aiding a hundred or greater concurrent clients, it charges between US$30,000 and $60,000 for the finished package including features.

    To remark on this article and different PCWorld content, consult with their fb web page or their Twitter feed.

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    Nortel VPN Gateway Rls.7.0 Configuration and Management

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    Nortel VPN Gateway 3050 | existent questions and Pass4sure dumps


    Setting up this product is not a simple task. Most of the setup is done via the command line, but the documentation does not befriend sheperd through this process very well. They organize ourselves looking through different guides trying to locate configuration information. The absence of a quickstart card or a getting started sheperd makes this chore even more difficult.

    Once the appliance is configured, there is a web interface, but it is ungainly and minimal at best. Overall management and administration tasks are difficult as well.

    The main focus of the Nortel VPN Gateway is to provide security for VPN connections. This includes encryption that supports authenticated and encrypted connections, both internally and externally. The device can besides terminate suspicious connections without leaving a trail on the user device. Furthermore, it supports an enhanced clientless mode that runs applets in the browser to build VPN tunnels for client/server applications.

    The VPN Gateway 3050 uses certificate-based authentication as well as two-factor and token based. Other types of authentication are besides supported, including local authentication database, LDAP, Radius, NTLM, dynamic Directory and Netegrity services support. One of this appliance’s strengths is its scalability. It is intended to back large-scale data-centre operations that require SSL VPN capabilities.

    We organize documentation for this product to be difficult to follow and not very well organized. The documentation is provided on a sever CD.

    When this is loaded, it displays a welcome screen that lists utter of the guides and manuals. In all, there are seven different manuals, some of which are hundreds of pages long.

    We organize ourselves searching through tons of documentation trying to find answers to configuration and setup questions. However, they did find the documentation to be complete if you beget the patience to search for what you need.

    Nortel offers technical assistance via phone and email, as well as much more in-depth back in the configuration of an additional back contract. Other areas of befriend provided are a lore base, training and certification options.

    We did not receive pricing information for this product and, therefore beget not evaluated it in this category.

    Setting up a VPN Gateway | existent questions and Pass4sure dumps

    A virtual private network (VPN) is a instrument that enables the secure transmission of data over untrusted networks such as the Internet. VPNs commonly are used to connect local zone networks (LANs) into wide zone networks (WANs) using the Internet. Perhaps you exigency to build a VPN between two offices but are not positive if the big infrastructure costs associated with an enterprise-level VPN solution are justifiable. The performance of applications that are intended for exhaust over LANs (for sample those that exhaust network file sharing) seriously can be degraded over WAN connections. Likewise, lower bandwidth and longer latency in WAN connections can strike adversely the reliability and performance of groupware and thin-client applications. Perhaps you beget a home office and would enjoy to exhaust your high-speed internet access to connect seamlessly and securely to your office LAN through an IPSec-capable router. Or perhaps you are just nosy about VPNs and IPSec in generic and want to experiment.

    The VPN firewall discussed in this article will Run on just about any 486-or-better PC that has 16MB or more main remembrance and two Linux-compatible Ethernet network cards. The concept is to provide a starting point from a single, self-contained package that will allow you to create robust, secure, scalable and highly configurable VPNs that besides are interoperable with many common commercial VPN implementations. If you wish to experiment on a low-maintenance firewall-VPN gateway, then the package discussed here might be benchmark for you.

    This article shows you how to set up, at minimal expense, a working VPN gateway that uses the IETF's (Internet Engineering chore Force) IPSec (internet protocol security) specification. IPSec is an open benchmark and is supported by virtually utter major firewall software and hardware vendors, such as Lucent, Cisco, Nortel and Check Point. This package will give you a widely interoperable IPSec that uses the de facto benchmark 3DES encrypted, MD5-authenticated site-to-site or point-to-site VPN. You should be able to conclude this without resorting to a complete Linux distribution or recompiling a benchmark Linux kernel with a kernel IPSec module.

    The VPN system they examine here is based on FreeS/WAN (, a portable, open-source implementation of the IPSec specification. FreeS/WAN has been demonstrated to interoperate, to various degrees, with Cisco IOS 12.0 and later routers, Nortel Contivity Switches, OpenBSD, Raptor Firewall, Check Point FW-1, SSH Sentinel VPN 1.1, F-Secure VPN, Xedia Access Point, PGP 6.5/PGPnet and later, IRE SafeNet/SoftPK, Freegate 1.3, Borderware 6.0, TimeStep PERMIT/Gate 2520, Intel Shiva LanRover, Sun Solaris and Windows 2000. The official FreeS/WAN web site has a regularly updated compatibility list with the latest version of its on-line documentation. FreeS/WAN version 1.5 is included in this package.

    I beget created a single-diskette distribution that installs the basis configuration of a VPN firewall based on the Linux Router Project (LRP,, a compact Linux distribution that can fortunate on a single, bootable floppy diskette. The distribution here is essentially Charles Steinkuehler's Eiger disk image with Steinkuehler's IPSec-enabled kernel and LRP IPSec package. Firewalling is carried out through Linux ipchains. This particular version is based on the 2.2.16 kernel of Linux. This distribution is called DUCLING (Diskette-based Ultra Compact Linux IPSec Network Gateway). Compact Linux distributions beget a twisted history. LRP technically refers to Dave Cinege's compact distribution. There are many variants around, including Charles Steinkuehler's distribution (EigerStein) of Matthew Grant's defunct Eiger version ( Another such distribution is David Douthitt's Oxygen ( Also, there is LEAF (Linux Embedded Appliance Firewall), a developer's umbrella that tries to coordinate releases and documentation, sort of enjoy a one-stop shop for compact Linux distributions ( I exhaust the term LRP to mention to the compact Linux distribution presented here, even though some may account this terminology incorrect.

    If you are running MS Windows 9x, the distribution self-extracts and installs itself onto a benchmark 3.5", high-density floppy diskette. You besides can write the image to a boot floppy if you beget a system running Linux. Once the extraction is done, you will exigency to boot off the floppy disk you beget created, copy the network drivers for your network cards over and edit the appropriate configuration files. That's it—no creating and formatting disk partitions or messing with boot managers on your difficult drive. If you are not cheerful with the distribution, just pop the diskette out, fling it away (or reformat it) and reboot your PC. Check the links on for more information on these options.

    Background on the Firewall and the VPN

    This distribution of LRP uses a benchmark ipchains-based firewall. ipchains (replaced by iptables in the 2.4 string kernels—see David A. Bandel's “Taming the Wild Netfilter”, LJ, September 2001) is a freely distributed packet filter for Linux. It is very instructive to inspect through the ipchains HOWTO if you are not familiar with this firewalling tool. This can be organize at

    The VPN is provided by FreeS/WAN's implementation of IPSec. FreeS/WAN's IPSec implementation is compliant with the IETF's IPSec specification. IPSec is an extension to the Internet Protocol (IP) that provides for authentication and encryption. Three protocols are used to ply encryption and authentication, namely ESP (Encapsulating Security Payload), AH (Authentication Header) and IKE (the Internet Key Exchange). utter these components are included in the FreeS/WAN implementation of IPSec and generally are transparent to finish users. ESP and AH ply encryption and authentication, while IKE negotiates the connection parameters, including the initialization, handling and renewal of encryption keys. The only encryption scheme currently supported by FreeS/WAN is 3DES (the triple DES or Data Encryption Standard—the current de facto benchmark for IPSec encryption). Authentication is carried out using MD5 digests of a so-called shared underhand (a shared key). The shared key could be a mutually agreed-to character string, RSA cryptographic key pairs or X.509 certificates. FreeS/WAN's KLIPS (kernel IPSec) component, which is compiled into the Linux kernel, implements AH, ESP and the handling of packets. IKE processes ply key negotiation, and renewals are implemented in FreeS/WAN's standalone pluto dæmon.

    Requirements and Installation

    First, you will exigency a PC with a floppy disk drive (I beget tested only 3.5" disk drives) and two network cards in it. The demands of LRP (the distribution) are minimal and conclude not require a powerful PC. Anything that is Intel 486-class or better with more than 8MB of RAM will do. You besides will exigency two floppy disks. Reliable, high-density 3.5" floppy disks should do, such as promotional diskettes from AOL. I beget never had any problems with generic floppy disk drives, but I beget organize some problems with writing the distribution to floppy disks with Imation USB U2 SuperDisk drives.

    You will exigency to download the appropriate DUCLING.tgz/zip distribution from and extract the contents of the archive file. If you beget a static IP address, then download the static version, and if you are assigned a dynamic IP address, you will exigency the distribution with a DHCP client. If you are running Windows 9x, download or Extracting the .tgz file with Winzip ( will bear a file, ducling-dyn-1-0.exe or ducling-stat-1-0.exe and directory modules. The .exe file is a self-extracting image that formats a floppy disk and writes the image to that disk. Run the ducling-stat-1-0.exe or ducling-dyn-1-0.exe file and status a floppy disk into the floppy disk drive. Note that any data on the disk will be overwritten.

    If you are using MS-DOS or Windows 3.1, the TSR utility FDREAD.EXE must be loaded at the DOS smooth first if you wish to read and write to the 1,722KB format disk. FDREAD.EXE is a freeware program from Christoph H. Hochstätter.

    If you are running Linux, download ducling-dyn-1-0.tgz or ducling-stat-1-0.tgz, untar the image (the sample here is for the DHCP-enabled dynamic IP address distribution):

    tar xvfz ducling-dyn-1-0.tgz

    and write the image file, ducling-1-0.img, to a formatted floppy using the Linux fdformat and dd commands:

    fdformat /dev/fd0u1722 dd if=ducling-dyn-1-0.ima of=/dev/fd0u1722 Once the floppy disk image is created as mentioned above, you will beget a bootable Linux floppy diskette.

    The zipfile/directory named modules contain the required network driver modules as well as optional modules for firewall masquerading. Copy the contents of the module zipfile or directory onto a sever second MS-DOS-formatted floppy diskette for the configuration portion of this discussion (below). In Linux, format a second floppy disk by running

    fdformat /dev/fd0

    followed by

    mkdosfs /dev/fd0 and mounting the floppy drive and copying the modules over. Read the documentation included in the README files, which will give you details on configuring your firewall/router.

    If you are unable to fortunate utter the desired packages and modules onto a unique floppy diskette, you will exigency to examine alternative setups that exhaust dual floppy diskettes (see the included README files with the DUCLING distribution), a bootable CD-ROM or even a minuscule difficult disk. mention to the on-line sources of LRP documentation for further information.

    The LRP Boot Floppies—The Surprising Truth

    You may be surprised to discover that LRP uses DOS-formatted floppies. You may be even more surprised to discover that the DUCLING distribution installs itself as a 1,722KB bootable disk image. The 3.5" high-density floppy is technically a 2MB format medium, and you may remark these diskettes rated as 2MB “raw” or “unformatted” capacity. The 1,440KB formatted capacity is merely the result of a conventional format that writes 80 tracks on the magnetic media with 18 sectors per track. With the appropriate tools, you can create diskettes that beget 80 sectors and 24 tracks per sector, giving 1,920KB per floppy. Floppies having 1,680KB (80/21 sector/tracks per sector) are used regularly for LRP distributions and appear to beget a trustworthy track record; 1,722KB (82/21), 1,743KB (83/21) and 1,760KB (80/22) besides are reported to be in use. I beget organize the 1,722KB format floppy to be trustworthy enough for testing and beget no problems to report so far.

    I beget created and used large-format floppies of up to 1,920KB. Extremely large-format floppies minister to be nonbootable, apparently as a result of a combat between PC BIOSes and the nonstandard sector size on the diskette. It has been reported that large-format floppies larger than 1,680KB can suffer from floppy disk hardware dependability problems. Windows NT and Windows 2000 are reported to beget reliability problems writing to large-format floppies larger than 1,680KB.

    MS Windows 9x operating systems generally read benchmark as well as large-format floppy diskettes with no configuration changes. In Linux systems, it is often necessary to mount the floppy disk with the reform format specified, i.e., /dev/fd0u1722, where fd0u1722 specifies floppy disk device 0 (fd0) and the u1722 specifies a 1,722KB format. The benchmark floppy disk drive in Linux /dev/fd0 defaults to /dev/fd0u1440, the 1,440KB format.

    For creating and manipulating large-format floppies, consult the LRP Boot Disk HOWTO by Paul Batozech. You'll find this, and other useful articles, in the resources listed at For MS Windows, I beget organize Gilles Vollant's WinImage ( to be particularly useful and user friendly. However, it is in some ways more limited than the Linux tools, such as fdformat, mkdosfs and the more recent superformat application. The self-extracting 1,722KBps images for MS Windows discussed here were created using WinImage.

    How the LRP Distribution Loads

    Before you begin to travail with LRP it is useful to note how the distribution works. If you examine the bootable diskette, you will remark a string of files, including ldlinux.sys, linux, syslinux.cfg, root.lrp, etc.lrp, modules.lrp and local.lrp.

    The file ldlinux.sys is the bootstrap loader that loads the kernel (the file named linux) and initial root.lrp package into memory. The kernel starts and creates a RAM disk and extracts the root.lrp package. A RAM disk is a portion of remembrance that is allocated as a partition. In other words, the kernel creates a space in remembrance and treats it enjoy a read/write disk. The kernel then mounts the boot device specified in syslinux.cfg. The remaining .lrp packages on the boot disk are extracted as specified in syslinux.cfg and loaded to the RAM disk. The .lrp packages are merely benchmark UNIX tarballs (tar-gzipped archives). Once the .lrp packages are installed in the directory tree on the RAM disk, the system begins a boot based on the benchmark Linux rc file boot hierarchy.

    LRP is simply a stripped-down benchmark Linux kernel with loadable modules and other software contained in sets of .lrp packages. LRP is truly Linux; generally, anything that will Run on a generic Linux distribution should Run off the LRP diskette. Often the block to extending LRP's applications and capabilities is the space constraint of a unique diskette. If you require additional capabilities, for example, remote administration through ssh, a DNS server and so on, you will want to inspect at multidiskette, CD-ROM or even the complete disk drive distributions of LRP that are available.

    Start up and Configuration of Router/Firewalling VPN

    Once the bootable floppy disk is created, develop positive the floppy is placed in the floppy disk drive of the machine on which you wish to Run the firewall/VPN. Ensure that the BIOS is configured to boot from a floppy disk. Upon booting the firewall/VPN, you will remark the LRP splash screen, messages from the Linux loader followed by a login prompt.

    If you beget made it this far, congratulations! You beget installed an LRP distribution successfully. Now you can start to configure the firewall properties of the LRP as outlined in the bundled documentation.

    Once any firewalling tweaks are completed, the VPN needs to be configured. The bundled DUCLING documentation discusses the details for configuring a subnet-to-subnet setup. This involves configuring IPSec's authentication mode (/etc/ipsec.secrets), the IPSec network configuration (/etc/ipsec.conf) as well as the firewalling rules to allow access to ports 500 (UDP), 50 and 51 (TCP).

    Note that you exigency not necessarily require a static IP address in order to Run VPN links. A “roadwarrior” configuration is described in the next section, in which the one VPN client has an undetermined static IP address. I beget Run VPNs between pairs of nodes with dynamically assigned IP addresses. The management of VPN nodes with DHCP-assigned IP addresses becomes tricky if both IP address assignments change frequently. The following section discusses a roadwarrior configuration using DUCLING and a Microsoft-based IPSec client.

    Interoperability Example

    This sample shows an MS Windows 9x/2000 client point-to-site using SSH Communications Security Sentinel 1.1 (Public Beta 3). FreeS/WAN is interoperable with a wide ambit of IPSec implementations. The ease of implementation and computability will vary depending on the product. Many IPSec products that back 3DES/MD5 encryption through IKE are interoperable with FreeS/WAN. However, I organize that legally obtaining fully functional IPSec implementations that back tough encryption can be arduous, especially if you live outside of the United States.

    Many vendors offer only limited capabilities in their freely available IPSec implementations. For example, a product may only back infirm encryption (DES) or may confine VPN capabilities to transport mode only. It is faultfinding to distinguish between the two VPN modes that are offered through IPSec: transport mode and tunnel mode. Transport mode encrypts and authenticates traffic between two fixed finish points. Tunnel mode is more useful for connecting subnets and allows tunneling through firewall and router parameters into different subnets. Basically, transport mode restricts traffic to point-to-point communication. Tunnel mode besides allows point-to-site (point-to-subnet) or site-to-site communications. At least one vendor does not appear to allow its implementation of IPSec to Run over a connection using a static IP address.

    The SSH Communications Security Sentinel product ( does not appear to suffer from any of these problems, possibly due to the fact that the company is based outside of the US. I downloaded and tested the 30-day trial beta 3 release of Sentinel 1.1 and organize it to be very light to configure on a Windows 98 desktop PC. The Sentinel documentation provides configuration examples for interconnectivity with a FreeS/WAN VPN gateway.

    Here is a summary of a roadwarrior configuration that allows remote users with dynamically assigned IP addresses to connect transparently to a LAN behind a firewall. You will exigency to open ports 50, 51 (TCP) and port 500 (UDP) to the dynamic IP address or the ISP's DHCP address range. figure 1 shows the basic setup. You will exigency to edit /etc/network.conf on the DUCLING FreeS/WAN firewall (go into lrcfg, elect 1), then 1) and set


    to disable the blocking of tunneled packets. The bundled documentation contains the particular instructions on how to conclude these tasks.

    Figure 1. A Roadwarrior-to-Site Configuration

    The contents of the FreeS/WAN ipsec.conf file are given in Listing 1. The corresponding ipsec.secrets file contains the entry PSK "Put your roadwarrior secret string here"

    where the phrase in quotes is a shared-secret string. The IP address denotes any IP address, so bethink to elect a secure shared-secret string. The rightsubnet and rightnexthop parameters are left blank and imply that the connection is a point-to-subnet connection.

    Listing 1. The FreeS/WAN conn Listing for the Setup Shown in figure 1.

    To set up the Sentinel IPSec service:

  • Download SSH Sentinel from and install, following the instructions.

  • Go into the Sentinel Policy Manager (Figure 2).

    Figure 2. Sentinel Policy Manager

  • Choose the Key Management tab, Authentication Keys and select Add (Figure 3).

    Figure 3. Adding a New Key

  • Select Create a new preshared key then Next (Figure 4).

    Figure 4. Configuring Preshared Key

  • Type in your preshared key. It must be identical to the shared-secret string you beget inserted in /etc/ipsec.conf (without the quotes). (See figure 5.)

    Figure 5. Typing in Shared Secret

  • Press Finish.

  • On the main console of SSH Sentinel Policy Manager, in the Security Policy pane, select VPN connections®Add.

  • Enter in the IP/hostname of the remote VPN gateway; for their example, it is, and elect the preshared underhand that you created in step 5 as the Authentication key (Figure 6).

    Figure 6. Entering Key and UP Information

  • Select 3DES encryption, Main Mode and MODP 1024 for IKE Mode and IKE Group, respectively. The Advanced pane generally can be left with the defaults.

  • Set the IKE SA lifetime (i.e., the interval between rekeying) to the identical value as in the ipsec.conf file, typically 480 minutes (eight hours).

  • Save utter settings and try to ping an internal node behind the firewall (try the internal interface, 192.168.x.254). You should be connected. Try running Sentinel's diagnostics to develop positive you are connected. I beget organize that Sentinel's diagnostic mode can hang the FreeS/WAN-Windows connections sometimes. If this happens, rend to the FreeS/WAN gateway and conclude a restart of IPSec and then bring up the various connections.

    Figure 7. The VPN Connection Properties Tab

    Once again, if you exigency to restart the connection, log in to the LRP box and type

    #/etc/initd.d/ipsec restart

    to restart the IPSec components.

    I besides organize in Windows 2000 Professional (but not Windows 98) that I had to add the routing manually to the shared subnet from the DOS console:

    route ADD MASK

    (refer to the documentation for the Microsoft route command).


    This article outlines the means to implement a firewalling VPN gateway from a unique 3.5" floppy diskette. With a unique floppy diskette, you should be able to connect hosts and networks of various topologies securely using the Internet. The DUCLING distribution is a bare-bones distribution. Once you are convinced that a FreeS/WAN VPN can fulfill your needs, you can inspect at either going to a more full-featured LRP distribution or even a full-blown Linux system, implementing such things as remote access (via the secure shell, ssh, for example) or a DNS server.

    Troubleshooting Resources

    Check Point and Nortel VPNs prove enterprise-worthy | existent questions and Pass4sure dumps

    For many companies, rolling out an IPSec client to road warriors and trusted commerce partners was once the only course to provide the secure access they needed. Now SSL VPNs are quickly gaining steam, poised to replace cumbersome IPSec implementations.

    SSL VPNs provide easy, clientless access to corporate resources without requiring a chubby client on each remote PC. Remote users connect using their Web browser and beget secure, managed access to Web applications, file shares, and the like.

    I reviewed two SSL VPN gateways from longtime security vendors: Check Point Software Technologies' Connectra 2.0 and Nortel's VPN Gateway 3050. Both systems are quite capable of handling an enterprise's remote-access needs, but each has its little, not-so-charming quirks, too.

    Check Point Connectra 2.0

    The Check Point Connectra Web security gateway should easily fortunate into your existing network infrastructure, especially if you already beget Check Point products in place. It provides access to both Web and TCP/IP applications, adds an application firewall and malicious-code-detection engine, and offers improved integration with Check Point's SmartCenter management platform. It lacks a TCP/UDP (User Datagram Protocol) port-forwarding service, present in other SSL VPN gateways, but it circumvents that with its layer 3 tunnel.

    I installed the Connectra 2.0 without any problems. The underlying OS detected my hardware and installed itself in less than an hour. I logged in to the Connectra using Internet Explorer 6 (IE is the only supported browser for administration) and defined authentication servers and protected resources.

    The Connectra's list of authentication sources is not as extensive as it is for other vendors' SSL VPNs, but for most situations LDAP, dynamic Directory via LDAP, RADIUS, local database, and digital certificates will suffice. I created a connection to dynamic Directory for my users, but not without a dinky effort. develop positive you know your complete LDAP log-in information. This portion could exhaust a dinky wizardry to develop the process more straightforward.

    By using Network Extender, Check Point's layer 3 service, I defined links to Web and file resources and to TCP/IP application access. Network Extender allows granular control over bidirectional TCP and UDP layer 3 tunneled traffic. Disappointingly, it is only available for IE users.

    Specifying Web resources and SMB file shares proved straightforward. However, accessing file shares requires Microsoft WebDAV. This delivers a Windows Explorer inspect and feel, but, again, it limits you to IE.

    A unique feature in Connectra allows admins to create mail services for remote users. As Nortel does with its VPN Gateway 3050, Check Point includes templates for OWA (Outlook Web Access) and benchmark SMTP, POP3, and IMAP to develop defining the resources quick and easy. I had no anguish creating links to my OWA servers.

    Connectra focuses heavily on network and end-point security, putting in status services that protect the enterprise at the network and application level. The product advances application-level security by checking traffic for known worms, plus it inspects utter HTTP traffic through its Web Intelligence service. Additionally, Connectra allows administrators to implement some validation on the HTTP traffic, such as denying unsafe HTTP methods, but the list of available choices is vague and doesn't allow for any tweaking of the rules.

    I was, however, impressed with the Connectra's built-in application protection. Although it's basic, admins can elect to prevent cross-site scripting, SQL and command injection, and directory traversal. This protection is no match for an application firewall such as Imperva's  SecureSphere , but it's a step in the perquisite direction.

    Overall, end-point security is well done and manages host checks, browser cache policies, and personal firewall status. Through Check Point's Integrity Clientless Scan, Connectra will check the remote PC for potential risks such as malware, but this feature is -- you guessed it -- limited to IE users. This scan besides looks for Check Point Integrity Firewall, but no other vendors' firewalls. Also, as with VPN Gateway 3050, there is no course to define specific processes or Registry entries to scan for.

    Connectra 2.0 warrants consideration, especially when compared with other enterprise remote-access solutions. It has utter of the core features, plus solid end-point security. I don't enjoy its cumbersome reliance on IE, and I would enjoy to beget more control over some security features, but it's noiseless a stable and capable system.

    Nortel VPN Gateway 3050

    Nortel's VPN Gateway 3050 appliance scales well and has highly configurable SSL parameters. It comes with utter of the SSL VPN services I've Come to expect in a gateway and does most other SSL VPN vendors one better by including IPSec VPN client support. TunnelGuard provides the end-point security and management piece via a download-on-demand Java applet, but it takes some time to rep up and running. Also, integration with dynamic Directory is a bit sketchy.

    I tested the 3050 by installing it in my test LAN, which was recently vacated by six other SSL VPN appliances. After setting IP addressing for my LAN through a local serial connection, I logged in with Firefox and finished the configuration using the administration UI. I organize the UI nicely organized, but locating specific menu options was not as intuitive as it is with the Connectra.

    I created a couple of test user accounts in the local user database and added dynamic Directory as my source for user authentication. The 3050 comes with back for RADIUS, NTLM (NT LAN Manager), SiteMinder, LDAP, and dynamic Directory via LDAP, but creating a connection to dynamic Directory nearly stumped me. Similar to my undergo with the Connectra, I had to ferret out LDAP syntax and enter it manually, but unique to Nortel is the requirement to besides list the dynamic Directory group and user-attribute mappings.

    Once in place, the LDAP/Active Directory authentication worked superbly and even allowed for the passing of expired dynamic Directory user accounts for password remediation. As with other SSL VPN gateways, administrators can stack different authentication services with a predetermined precedence to allow for elastic user authentication. For example, a user might first be checked against the local user database and, when no match is found, checked against the next authentication service -- RADIUS, for example.

    The 3050 offers noteworthy flexibility in how it provides remote access. Service providers can virtually slice up the 3050 into many several sites, each with its own authentication schemes and resource definitions. enjoy F5's Firepass, the 3050 comes with VLAN back and, when clustered, scales very well.

    Like the Connectra, the 3050 has solid browser-based back but goes on to ply both TCP and UDP apps via a download-on-demand Java applet. The 3050 besides comes with canned definitions for Citrix, Telnet, and SSH; it besides allows for autochthonous Outlook (fat client) connection across the Internet. Nortel provides RPC across SSL without requiring any changes to your Exchange server, much enjoy Exchange 2003's new RPC across HTTP service.

    Netdirect is the ActiveX-based complete tunnel for those who exigency a layer 3 connection. Although limited to Windows platforms, Netdirect does allow for complete bidirectional TCP/IP traffic and supports both split and complete tunneling. I enjoy that the virtual adapter removes itself quietly on disconnect so there are no lasting traces on the PC.

    Unlike the Connectra, admins running the 3050 beget a huge amount of control over SSL implementation as well as HTTP-specific settings, which allow for granular control over items such as SSL Header rewrites, secure cookies, and image, script, document, and ICA (Independent Computing Architecture) caching. But missing is any ilk of application firewall.

    End-point management and control are handled through Nortel's TunnelGuard service. A Java-based utility, TunnelGuard checks a remote PC for compliance, but only after the user authenticates. It will check for any disk content, running process, and digital certificates on files. Currently it will not effect Registry, program-version, or date checks, which prevents the utility from looking for convincing and up-to-date anti-virus programs. Although it's comprehensive, I organize the TunnelGuard management overly complex.

    VPN Gateway 3050 is a noteworthy all-around performer that needs a dinky travail on end-point security. I don't enjoy that it requires IE for its cumbersome lifting, but the SSL control and IPSec client back befriend develop up for these deficiencies.

    The Connectra will fortunate in well at shops invested in Check Point's products. Its tough integration with SmartCenter is a bonus. Nortel's 3050 scales well and comes with very granular security, and it's a noteworthy election for enterprises that beget a cumbersome IPSec installed basis and want a graceful migration path to SSL. Both systems depend too much on IE, but overall, both are worthy security solutions.

    InfoWorld Scorecard

    Scalability (20.0%)

    Setup (10.0%)

    Security (35.0%)

    Interoperability (25.0%)

    Value (10.0%)

    Overall Score (100%)

    Nortel VPN Gateway 3050 9.0 7.0 9.0 7.0 8.0 8.2 Check Point Connectra 2.0 8.0 8.0 9.0 7.0 9.0 8.2

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