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920-468 exam Dumps Source : Nortel VPN Router Rls.7.0 Advanced Configuration & Management
Test Code : 920-468
Test designation : Nortel VPN Router Rls.7.0 Advanced Configuration & Management
Vendor designation : Nortel
: 56 real Questions
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Nortel Nortel VPN Router Rls.7.0
EUC with HCI: Why It concerns
Nortel has released a patch for a vulnerability in its VPN routers that could both trigger them to automatically reboot or reside down unless a manual reset is completed.
security enterprise NTA monitor observed it discoved the denial of service (DoS) vulnerability in Nortel VPN Router items (up to now known as Nortel Contivity) whereas performing a VPN protection verify for a consumer. The company described the vulnerability as "severe ... as a result of a unique malformed IKE packet causes the VPN router to crash. also it is not constantly feasible to tarry away from the malformed packet from accomplishing the router."
NTA monitor suggested that the vulnerability is brought on by using sending an IPsec IKE packet with a malformed ISAKMP header. The organization stated that receipt of the packet caused a crash "every time this kindly of malformed packet is distributed."
in line with the community, in assessments the affected router automatically rebooted about 80 p.c of the time, however required a manual reboot 20 p.c of the time. extra, the routers confirmed failed to log receipt of the packets, even when logging become set to optimum verbosity. The corporation speculated that this become the influence of the routers crashing before they may even log the packet.
additional, the neighborhood argued that "safety via obscurity" is a very harmful fashion in this case:
"it's feasible for attackers to become vigilant of and fingerprint Nortel VPN routers the usage of [...] IKE fingerprinting suggestions," the neighborhood referred to in its document. "for this understanding clients may quiet no longer assume that their VPN router is invisible simply because it's now not posted within the DNS and isn't running any TCP features."
NTA stated that the situation influences Nortel VPN router models 1010, 1050, 1100, 600, 1600, 1700, 2600, 2700, 4500, 4600 and 5000.
Nortel consumers with a telling login on the enterprise's web site can entry the Nortel bulletin on the vulnerability and download a patch.
No outcome discovered, try unique key phrase!The Nortel services being sold through TELMEX are in line with Nortel’s communique Server 2000 softswitch that supports a wide array of voice and multimedia business facets. VPN Router complications Nortel has ...
TSX : NTOTC Bulletin Board : NRTLQ
may also 20, 2009 06:00 ET
Capital and Operational discounts Enabled by the consume of unique products of statistics Portfolio
TORONTO, ONTARIO--(Marketwire - can also 20, 2009) - Nortel(1) (TSX:NT)(OTCBB:NRTLQ) today delivered unique information products which are quicker, greater secure and cheaper than competing options, and are specially designed to steer the needs of ultra-modern real-time enterprise purposes.
Nortel's discrete portfolio of recent items permits firms to construct networks which are more efficient and advantageous. The newest advancements in expertise and techniques, energy-efficient hardware, and imaginitive aspects each and every feed into the introduction of a network that minimizes capital gear and charges, optimizes each and every attainable supplies, and reduces operational affliction and rate while presenting the basis for unified communications.
"Nortel's relentless accommodate to create innovation on each and every fronts - in expertise, in products, in power efficiency and with their shoppers is why they proceed to set up and hint their voice and facts solutions. Nortel provided us the architecture, the administration and the financial mannequin to achieve resiliency, ease-of-use and value effectiveness," spoke of Pierre-Eric Belzile, executive director, tips and communique expertise, Montreal Canadiens(2).
"Our dedication to their valued clientele is unwavering. they are carrying on with to innovate and deliver the solutions that extend the can saturate structure, functionality and reliability of enterprise networks," noted Joel Hackney, president, enterprise solutions, Nortel. "We continue to breathe at the leading edge of solving clients' complications and assembly their wants with solutions constructed for velocity, reliability and price. To that conclusion, we're introducing a number of unique products purpose-built to succor the pass forward for communications."
New solutions accommodate client Momentum
built for precise-time purposes, Nortel's records portfolio allows businesses to simplify and extend the tempo of their operations. in response to Nortel's information foundational principles of resiliency, efficiency, efficiency, safety, and multivendor options, the enterprise unveiled unique products to streamline operations to assist supply businesses a aggressive potential. These build on Nortel's style of delivering innovation into its currently refreshed facts portfolio - third-party proven to supply 20 times the performance, seven instances the resiliency at up to half the entire saturate of ownership(3) of competing solutions.
The virtual features Platform 9000 (VSP 9000) is Nortel's newest excessive-efficiency, subsequent-era, core records community answer. offering twice the performance of competing solutions(four), it is aim-developed for mission-essential campus networks and records centers that require extremely-reliability, flexibility, and virtual community functions. The VSP 9000 enables corporations to realize the efficiencies of a simplified infrastructure that may virtualize elements of the community to wholly and successfully produce the most of servers as smartly as the network capabilities, cutting back the stress on personnel and substances. (Please see confederate announcement, Nortel Unveils subsequent-Gen Core commercial enterprise community answer).
Augmenting the company's line of cozy Routers is the Nortel comfy Router 2330, which offers built-in routing, WAN, safety and voice gateway services for wee and mid-measurement branches. the brand new, budget friendly 2330 platform, along with Nortel's relaxed Router 4134, also helps survivable SIP features, vital for IP telephony deployments where voice communications ought to breathe ensured within the case of IP WAN or voice designation server disasters.
"As a world, leading-edge manufacturer, the reliability of their community is crucial to their everyday operations. Nortel has served us well to this point with their portfolio and we're excited concerning the possibilities of Nortel's secure Router 2330. They see this platform giving us unique deployment options with its least expensive modular design and built-in voice capabilities," referred to Steven Lee, network engineer, countrywide Semiconductor.
Unified Communications administration (UCM) is a brand unique Nortel respond that consolidates management, configuration, operations and deployment of UC solutions to deliver more centralized, built-in control of voice and statistics infrastructure. The UCM respond centralizes management of heterogeneous network assets to simplify community operations, which effects in reduce prices and a greater constructive unified communications system.
Kevin Harshaw, senior director, Olympic Operations for Bell explained the magnitude of the UCM portfolio: "Given the censorious nature of working the Vancouver 2010 Olympic and Paralympic iciness video games(2), Bell ought to breathe able to readily control and proactively reply to issues earlier than they maintain an effect on community efficiency. Nortel's Visualization efficiency and failing supervisor, with its configurable polling, entice reporting and notification aspects, allows us to effect exactly that. now not most efficient does it deliver a centralized, UC management solution that helps find and connect infrastructure machine and end-nodes during the network, however additionally helps us slice back working charges. Its potent management features produce it a key point in enabling Bell to carry flawless community insurance for the video games."
Nortel's Unwired business vision centers across the unique instant local district network 8100 (WLAN 8100) sequence of routers. This respond will provide seamless integration of wired and unwired network elements to succor create a greater seamless communications smack for IT managers and halt clients. in keeping with the 802.11n protocol, the solution combines the latest industry requisites with a very unified architecture - leading to lessen total can charge, greater potential, performance and coverage - in addition to a simplified infrastructure that can provide relaxed, widespread mobility.
Carol Barber is government director and chief expertise officer for the Western long island Regional tips core, an organization that along side the Boards of Cooperative education services, serves virtually a hundred college districts in tremendous apple state and helps more than 95,000 computer systems: "The Western manhattan Regional assistance middle has been a Nortel WLAN client for a long time, and we're enthusiastic about their next-generation WLAN 8100 answer. They map to visitation this enjoyable unique expertise in their community later this 12 months," Barber observed. "When Nortel first released its imaginative and prescient of the Unwired enterprise, it really hit home with us. Their approach for actual wired and instant integration resonates with their view of the location the market is heading."
Nortel's recently launched Ethernet Routing switch 5600 is the primary respond to achieve terabit speeds for stackable switches. The switches tender extra bandwidth ability, more suitable performance and expanded resiliency than aggressive solutions. elevated port density and superior stacking capabilities also add to the cost-proposition, as fewer switches are required.
in addition, the business recently added the Nortel comfy Router 8000 sequence to deliver feature-wealthy IP routing, bendy vast-area networking and provider-type reliability. Designed for commercial enterprise facts centers, and core and head-end routing applications, this respond grants the excessive-performance, resiliency and protection that organizations requisite to meet growing bandwidth calls for.
Demonstrating the company's management in finished community access security options, Nortel also these days launched its identification Engines portfolio. providing network identification management, the id Engines solution augments Nortel's present network access control (NAC) expertise by using adding a unique set of capabilities including business-wide 802.1X help, reporting, id-mindful networking and centralized coverage resolution across LAN, WLAN and VPN. identity-primarily based network entry ply restricts entry to the community, features and applications in response to the person, time of day, health of the gadget, community entry components and different variables in an automatic, centralized environment.
"Complexity fees companies greater than connected expenses, it additionally robs them of productiveness, effectiveness and the skill to meet their enterprise case," said Hackney. "Nortel has been at the forefront in providing unified communications options, so it's totally applicable that they would continue to innovate to carry the solutions that operate with enhanced efficiency, reliability and control than different options."
Nortel is a diagnosed chief in supplying communications capabilities that produce the pledge of company Made simple a fact for their valued clientele. Their next-generation technologies, for both service company and commercial enterprise networks, champion multimedia and business-essential applications. Nortel's applied sciences are designed to champion dispose of latest limitations to efficiency, hurry and performance by pass of simplifying networks and connecting people to the tips they need, after they want it. Nortel does enterprise in additional than one hundred fifty nations each and every over the world. For more counsel, hunt recommendation from Nortel on the internet at www.nortel.com. For the latest Nortel information, hunt recommendation from www.nortel.com/information.
certain statements during this press unencumber might also comprise words corresponding to "could", "expects", "might also", "anticipates", "believes", "intends", "estimates", "aims", "envisions", "seeks" and other identical language and are considered ahead-looking statements or assistance under pertinent securities legislation. These statements are in line with Nortel's latest expectations, estimates, forecasts and projections concerning the operating atmosphere, economies and markets during which Nortel operates. These statements are bailiwick to famous assumptions, risks and uncertainties, which are difficult to predict and the actual effect could breathe materially diverse from these meditated in ahead-searching statements. For more information with recognize to unavoidable of these and different factors, see Nortel's Annual record on Form10-okay, Quarterly reports on kindly 10-Q and different securities filings with the SEC. except otherwise required by pertinent securities legal guidelines, Nortel disclaims any intent or duty to supplant or revise any forward-searching statements, whether on account of unique counsel, future activities or in any other case.
(1)Nortel, the Nortel brand and the Globemark are trademarks of Nortel Networks.
(2)here's a 3rd birthday party hyperlink as described in their web linking practices.
(three)The Tolly group report number 208298, July 2008, said the outcomes of a power consumption evaluation of six Nortel converged facts network items together with tremendous and medium core and wiring closet Ethernet Routing Switches (ERS), commercial enterprise department office routers, and IP telephones in comparison to an identical Cisco products on the basis of vigour consumption and warmth dissipation, and five-yr operational cost. see also The Tolly community record number 208275, January 2008, and data-Tech analysis group document (January 30, 2008).
(four)The performance comparison is based upon Nortel's model VSP 9000 product which achieves throughput of 970 Mpps via ten output slots, in comparison to Cisco's model 7010 product which achieves throughput of 480 Mpps through eight output slots, as pronounced on the product facts sheet on Cisco's publicly obtainable web page. "The performance assessment is based upon Nortel's mannequin VSP 9000 product which achieves throughput of 1,700 Mpps through ten output slots per chassis working in community extravagant availability mode the usage of Nortel's swap Clustering characteristic for both Layer 2 and/or Layer 3 traffic flows, in comparison to Juniper's mannequin EX 8208 product in tall availability mode which achieves throughput of 970 Mpps and does not maintain a function corresponding to Nortel's swap Clustering, but fairly depends upon Layer 3 protocols such as OSPF with ECMP to load balance simplest Layer three IP traffic flows, as suggested on the product statistics sheet on Juniper's publicly obtainable site.
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Nortel VPN Router Rls.7.0 Advanced Configuration
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Assuming you already maintain a functional network, there are many reasons why you may want to reckon purchasing a unique router. Obviously, scalability is one reason. You may maintain flee out of Ethernet ports on your router. Your router may breathe near its shelf life (perhaps it has been serviced too frequently and is off of warranty and/or support), and you know it is time for a newer model. You may maintain a unique requirement to champion a different protocol than you maintain been using -- such as RIP2, BGP, IGMP, HSRP, IGRP or OSPF -- and perhaps your existing router does not champion this protocol. You might want to implement VLANs into your network. Perhaps you requisite to labor with spanning tree. You may also maintain a unique requirement to provide better failover and redundancy that your existing router just does not provide. Perhaps you want an integrated VPN solution to breathe partake of your router, without having to depend on a firewall. (There are pros and cons of doing it this way, but clearly if there are budget constraints, an integrated packet filtering router that also provides VPN services for remote client connectivity may really succor you.)
Wireless is another district to consider. Many routers, particularly home-based solutions, tender integrated routers based on wireless solutions, though I would personally recommend a divide access point for your business when doing wireless -- one which is optimized for security. Though it clearly works well for home consume (and I consume one myself at home), I would certainly not purchase a Linksys router/switch/wireless access point for my business.
Support: Some things to considerWhen upgrading to a unique router, you must produce confident that you understand the character of champion that you will breathe getting from your vendor. If you try to depart with a low-priced router, it may not maintain the technical staff to succor you deal with the problems that will develop. One must also reckon the platforms that WAN engineers typically use, as it will breathe easier to champion your environment with industry-standard products that are fully utilized by the majority of companies, wee and large.
For both the enterprise and SMB, it is famous to select a manufacturer that cares enough about their products to educate engineers who are accountable for deploying their solutions (and not just box pushers). For example, Cisco network engineers typically will try to win a CCNA or (if they are really amazing) CCIE certification from Cisco, which showcases their skill sets to employers. Nortel offers an NCA at their highest level, which represents a highly advanced flat of technical design and analytical expertise for knotty Nortel Networks solutions, also widely acknowledged throughout the industry and regarded a emblem of excellence. Nortel has the greatest telephony experience, having grown up in that world, so I would seriously reckon using their infrastructure if you are looking for tough VOIP integration. 3Com also offers certification in their technologies. Their router cert is the 3Com Certified WAN Specialist, which demonstrates skills in designing and implementing 3Com WAN solutions, working with 3Com routers and protocols including OSPF and BGP4.
Product lines: What to expectLet's peer at what a few of the major router vendors tender from their product lines.
For SMBs, Cisco has the 1800 Series, which provides WLAN capabilities along with advanced with advanced security services and management features such as hardware encryption acceleration, IPSec VPN (AES, 3DES, DES), firewall protection, inline intrusion prevention, Network Admission Control, and URL filtering champion to allow their smaller customers to implement resilient, scaleable solutions. Cisco helps its clients to optimize networks via a purview of products and services, which they tender through their dealer channel. Through their Cisco Registered confederate program, they ensure that their partners are certified annually and maintain the erudition and information at their disposal to fully champion their customers. 3Com and Nortel also tender similar services. In addition to their SMB routers, Cisco also offers enterprise-wide models, including the 7600 series, their high-end model which offers integrated, high-density Ethernet switching, carrier-class IP/MPLS routing, and 10-Gbps interfaces.
3Com also has a tough product line, and I am particularly impressed with their 6000 chain model, as it has every feature you can possibly contemplate of, including failing tolerance and advanced traffic management and control features. I maintain deployed 3Com-only switch and routing infrastructures with Great success in the past.
On the Nortel front, they maintain teamed with Microsoft to champion Microsoft's Network Access Protection (NAP), an extensible standards-based technology that allows users to more securely access their corporate networks and reduce the complexity of network access for IT administrators. They are also working together with other industry-leading security companies to develop industry standards, network designs and products intended to secure censorious information by protecting the communications infrastructure as well as user computing devices fancy desktop and laptop computers. This partnership is important, because despite the fact that many WAN folks abhor Microsoft, those people will quiet requisite to deal with Microsoft on the PC client side.
Regarding Nortel's product line, I'm impressed with the Nortel Multiprotocol Router 5430, which is being marketed to remote offices that maintain outgrown smaller arm office routers. It can champion concurrent, compute-intensive applications such as IP attribute of Service, IP multicast, compression and VPNs. It also has champion for multiple WAN technologies -- including ATM T1/E1 and T3/E3, frame relay, PPP and ISDN.
Cisco has its own propriety product called the Cisco Systems' Network Admission Control (NAC), which will also carefully anatomize any PC that wants to attach to your network, to check for the presence and status of antivirus and personal firewall software and report on the configuration of the machine. I feel Nortel has the edge here, because most desktop clients are Microsoft, and it is to their edge that unlike Cisco, they maintain chosen to confederate with them, and not develop their own proprietary standards.
In conclusion, I will reiterate that when looking to purchase unique routers for the enterprise, one must peer for VPN capability, mulit-protocal support, integration with other networks, security enhancements (I.E (3-DES encryption) and direct vendor support. Though I would not hesitate to cost out alternate solutions, I prefer industry-standard products for the enterprise.
Kenneth Milberg is systems consultant with his own independent consulting firm, Unix-Linux Solutions. He has fifteen years of smack with Unix and Linux systems, as well as broad technical and functional smack with AIX, HP, SCO, Linux and Solaris. Milberg holds certifications with IBM (IBM Certified Systems Expert -- eServer p5 and pSeries Enterprise Technical champion AIX 5L V5.3 & IBM Certified Specialist –HACMP), SUN (SCNA,SCSA), HP (HP Certified –HP-UX administration) Cisco (CCNA) and Oracle (OCP-DBO).
The Great VPN debate
Consider the strengths and weaknesses of IPSec and SSL before picking the technology that's prerogative for your virtual private network
By David Essex
Apr 28, 2006
The saga of the Labor Department's attempt to outfit Mine Safety and Health Administration employees with remote access through virtual private networks serves as a minihistory of the technology. In 2003, the agency tried VPNs based on the most common technology of the time: Internet Protocol Security, which essentially provides a direct pipe to the agency network. But administrators got bogged down in tech support. IPSec requires installing a tricky-to-configure program on every remote machine. Plus, firewall and other network conflicts can value succor desk nightmares.
The following year, the agency moved to Secure Sockets Layer VPNs. Touted as IPSec's heir apparent, SSL VPNs employ Web browser technology that requires diminutive or no client software. The agency installed SSL VPN appliances from Juniper Networks and by spring 2005 had 2,200 employees using remote access'and a huge drop in service calls.
Many agencies, if they maintain not already done so, will soon pan the issue of what technology they should consume to connect remote workers. While the push for more telecommuting by federal employees is a major driver of VPN demand, experts also cite tough interest from agencies implementing catastrophe recovery plans.
'A lot of governments feel they requisite to maintain fail-safes in location so that if up to 75 percent of the employees maintain to labor at home, they will breathe able to ply that spike,' said Robert Whiteley, senior analyst at Forrester Research.
In fact, VPN sales are skyrocketing across each and every industries. According to International Data Corp., a market research firm, worldwide sales of just $75 million in 2003 nearly tripled to $200 million the following year and were estimated to immediate out 2005 at $325 million.
Pros and cons
In a nutshell, a VPN is a pass to link network nodes over the public Internet while keeping the connection private, using encryption and other security techniques.
Here's the censorious incompatibility between the two main technologies: IPSec essentially opens a fully functioning pipeline directly to the internal LAN, while SSL provides access to a select group of applications.
'IPSec is fancy an extension of your LAN,' Whiteley said. 'It's a Layer 3 pipe, and pretty much every application will flee over it. SSL sits above that, in Layer 4 or 5, so it doesn't necessarily labor with each and every applications.' Still, SSL vendors maintain create ways around these limitations, Whiteley said.
In practice, the incompatibility in client-side software means IPSec may breathe preferable for securely linking two computers in different locations, called a site-to-site VPN. IPSec proponents also hiss it is superior for transferring great files.
With its simple setup, SSL is generally better for quickly activating great numbers of remote users, even on an ad hoc basis.
'IPSec VPNs are the clear selection when you maintain two dedicated endpoints,' said Tim Simmons, product marketing manager at Citrix Systems, a maker of SSL VPN appliances and remote-access servers for the Defense Department and other great agencies. 'SSL VPNs really exceed at the connections to multiple unknown clients.' Several SSL-oriented vendors hiss they invested in the technology precisely to succor organizations avoid problems they had getting IPSec to traverse network address translation and firewalls.
VPNs wanted, but which kind?
With telework, business continuity top-of-mind, agencies will peer for secure remote access
By David Essex
May 26, 2006
The saga of the Labor Department's attempt to outfit Mine Safety and Health Administration employees with remote access via virtual private networks serves as a mini-history of the technology.
In 2003, the agency tried VPNs based on the most common technology of the time: Internet protocol security, which essentially provides a direct pipe to the agency network.
But administrators got bogged down in tech support. Internet protocol security requires installing a hard-to-configure program on every remote machine. Plus, firewall and other network conflicts can value help-desk nightmares.
The following year, the agency moved to secure sockets layer VPNs. Touted as Internet protocol security's heir apparent, secure socket layer VPNs consume Web browser technology that requires diminutive or no client software.
The agency installed SSL VPN appliances from Juniper Networks Inc. of Sunnyvale, Calif., and by spring 2005 had 2,200 employees using remote access ? and enjoyed a huge drop in service calls.
Many agencies, if they maintain not already done so, soon will pan the issue of what technology they should consume to connect remote workers, and they'll breathe looking to integrators to succor produce a decision. While the push for more telecommuting by federal employees is a major driver of VPN demand, experts also noted a tough interest from agencies implementing disaster-recovery plans.
"A lot of governments feel they requisite to maintain fail-safes in place, so that if up to 75 percent of the employees maintain to labor at home, they will breathe able to ply that spike," said Robert Whiteley, senior analyst at Forrester Research Inc. of Cambridge, Mass.
VPN sales are skyrocketing across each and every industries. According to market research solid International Data Corp. of Framingham, Mass., worldwide sales tripled from $75 million in 2003 to $200 million the following year. IDG estimated sales would immediate out 2005 at $325 million.
A VPN links network nodes over the public Internet while keeping the connection private through encryption and other security techniques. Here's the censorious incompatibility between the two main technologies: Internet protocol security opens a fully functioning pipeline directly to the internal LAN, and secure socket layer provides access to a select group of applications.
Internet protocol security is fancy an extension of a LAN, Whiteley said.
"It's a layer 3 pipe, and pretty much every application will flee over it. SSL sits above that in layer 4 or 5, so it doesn't necessarily labor with each and every applications." But SSL vendors maintain create ways around these limitations, he said.
In practice, the incompatibility in client-side software means Internet protocol security may breathe preferable for a site-to-site VPN, the secure linking of two computers in different locations. Internet protocol security proponents also said it is superior for transferring great files.
With its simple setup, SSL generally is better for quickly activating great numbers of remote users, even on an ad hoc basis.
"Internet protocol security VPNs are the clear selection when you maintain two dedicated endpoints," said Tim Simmons, product marketing manager at Santa Barbara, Calif.-based Citrix Systems Inc., a maker of SSL VPN appliances and remote-access servers for the Defense Department and other great agencies. "SSL VPNs really exceed at the connections to multiple unknown clients."
Several SSL-oriented vendors said they invested in the technology precisely to succor organizations avoid the problems they had getting Internet protocol security to traverse network-address translation routers and firewalls.
Don't I know you?
Internet protocol security and SSL soon may start to peer more alike. It once was safe to hiss that SSL required no special client software, but SSL VPN vendors maintain been adding features that require the remote device to download wee energetic X or Java applets ? and sometimes they consume Internet protocol security for the download.
"Everybody is affecting toward complete VPN clients," Simmons said. "SSL VPNs are starting to peer a lot fancy Internet protocol security VPNs."
"The problem is not having a client on the endpoint, per se, it's how effect you win that client to the endpoint?" said Niv Hanigal, product manager for Juniper.
Hanigal said users of Juniper VPNs don't maintain to worry about software. "They depart to the Web site to log in, and in the background, something's being downloaded," he said. "It's usually only 500K."
It's not always an either-or selection between Internet protocol security and SSL. A few vendors, among them Check Point Technologies Inc. of Redwood City, Calif., Cisco Systems Inc. and Nortel Networks Corp. of Brampton, Ontario, tender hybrids that give remote users more connection choices.
Some SSL vendors depend on Internet protocol security to tender client-server access or to string SSL appliances together. And several companies tender different versions of VPN to meet agencies' unique requirements.
All VPN products champion a slew of government-endorsed encryption schemes, such as advanced encryption standard and triple data encryption standard.But the products that meet the most stringent standards depart through testing overseen by the National Institute of Standards and Technology to achieve certification for Federal Information Processing standard 140-2. A few also are certified under Common Criteria encryption and authentication testing by the National Information Assurance Program, a NIST partnership with the National Security Agency.
As a complete network connection, Internet protocol security is more open to exploitation by hackers, especially through underprotected remote machines, according to John Girard, an analyst for Gartner Inc. of Stamford, Conn., and author of a 2005 analysis of the competing technologies.
Because Internet protocol security doesn't accommodate tough authentication, it is accessible via a simple user designation and password, which increases the desultory of break-ins, Girard said.
But SSL is not without dangers. Thanks to widespread deployment, the total risk from the number of unmanaged PCs is greater. It's an feeling shared by Sonny Gutierrez, LAN/WAN security specialist at CDW Government Inc. of Vernon Hills, Ill., which sells both types of VPN products.
"You can sleep smooth at night knowing you're running Internet protocol security tunnels instead of SSL," Gutierrez said. "Internet protocol security technology is basically built into every firewall."
Organizations should establish policies to restrict SSL VPN use, Girard said. Products geared to great enterprises, such as those from Aventail Inc. and F5 Networks Inc., both of Seattle, and Juniper, enhance security with administrative software.
"We allow the administrator to control specific applications on a particular user's device," said Chris Witeck, Aventail's director of product management. "You're not really authorizing a user to access your network, you're letting them access specific resources."
Enterprise class VPN products also fulfill endpoint analysis, also called integrity checking, which tests the remote client for firewalls, anti-virus programs, the latest patches and other requirements specified in an agency's security policy.
Such VPNs can restrict access to specified applications or saunter the apps to a quarantined LAN. As an SSL VPN feature, this is useful especially for employees who access VPNs from shared machines, such as airport kiosks and public library terminals. In such situations, SSL VPNs may default to the most basic capabilities supportable in a browser, such as checking e-mail stored on an agency server or browsing the Web.
The more advanced endpoint analysis programs will automatically shut down a VPN session if they detect, for example, that the user has turned off the anti-virus program.
VPN logins are also a fine pass to beef up security for employees accessing the wired LAN from inside. "Since the perimeter is going away, you maintain to peer at access control not just for people coming in, but also contractors and partners who are sitting on the inside," said Sanjay Uppal, executive vice president of product management at Caymas Systems Inc., San Jose, Calif. each and every applications could breathe enabled through a public-key infrastructure, "but that is going to breathe prohibitively expensive," he said.
Most VPN products are sold as appliances: thin network boxes connected via Ethernet ports. Some arrive as upgrade boards that proper inside routers and switches. VPN boxes can sit either in a network's demilitarized zone behind the firewall as an extra measure of security, or outside the demilitarized zone.
The key feature to peer for is the maximum number of concurrent users, which is the best measure of scalability. Small-office systems top out at a few dozen; enterprise systems can achieve several thousand.
To obviate failures, some of the highest-capacity appliances add reliability features, such as redundant, hot-swappable drives and power supplies. They also can breathe clustered to expand capacity and help performance as demand increases, but this can require additional load-balancing hardware.
Get your guard up
Intrusion detection devices and security information management technology,if not already present, can succor guard against attacks coming through the VPN. Many of these products arrive with built-in VPNs.
An alternative to hybrid devices is for integrators and their customers could merge and match Internet protocol security and SSL devices in the selfsame network, linking their VPNs.
"Crypto is crypto," said Charles Kolodgy, an IDC research director who worked in defense procurement. "It's really just being able to create an SSL tunnel to an Internet protocol security tunnel."
Software is the other option. Cranite Systems Inc. of Los Gatos, Calif., often pairs its Safe Connect proprietary software-based VPN with its FIPS 140-2-certified WirelessWall wireless security software, said Mike Coop, vice president for consulting engineering. "It prevents the Windows stack from being attacked externally," he said.
Blue Coat Systems Inc. of Sunnyvale, Calif., and PortWise Inc. of Mountain View, Calif., also sell software VPN and other remote-access solutions.Software VPNs can drain server performance, but they tender the greatest platform flexibility.
"The understanding you depart to software is if you want to consume your own hardware model," said Zeus Kerravala, vice president of enterprise research at market research solid Yankee Group Inc. of Boston.
Of each and every the options, appliances are the most expensive. Caymas Systems Inc. of San Jose, Calif., for example, charges $15,000 to $55,000 for its most common models for government, followed by add-in cards, then software, Forrester's Whiteley said.
Many agencies might breathe interested in a limited pilot or deployment before rolling out nationwide, CDW-G's Gutierrez said. Sometimes, as in the case of the Labor Department, visitation and mistake helps illustrate the differences between the leading VPN technologies and leads your customers to the one that works best for them.
David Essex is a freelance technology writer in Antrim, N.H.