pptp

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Configure VPN 3000 concentrators to accept PPTP, L2TP/IPsec, and WebVPN remote access sessions

This sample chapter, taken from The Complete Cisco VPN Configuration Guide, focuses on the configuration of the concentrator to support certain types of remote access VPN implementations. Learn how to configure remote access sessions: PPTP, L2TP/IPsec, and WebVPN.This sample chapter, taken from The Complete Cisco VPN Configuration...

Tags: Cisco VPN 3000 Concentrator, PPTP, Cisco Systems Inc., Remote Access Session, Remote Access, VPNs, Telecommunications, Networking

Book chapters 2006-02-06

Establish a client connection to a Windows VPN with this step-by-step guide

Connect to a Windows Server 2003-based PPTP virtual private network VPN with this step-by-step user installation and configuration guide. Installing and configuring a Microsoft Windows Server 2003-based PPTP virtual private network VPN is only half the equation—as a network administrator you still have to get end-users connected...

Tags: TechRepublic Inc., Microsoft Windows Server, PPTP, VPNs, Microsoft Windows Server 2003, Microsoft Windows, Network Security, Networking, Telecommunications, Security, Servers, Operating Systems, Software, Hardware

Download resources 2005-08-01

PPTP VPN authentication protocol proven very susceptible to attack

PPTP VPN authentication protocol proven very susceptible to attackThis is a frightening blog entryI hope that the right people read it.Stephenlong time has gone but have people really get thisalthough such a long time has passed since the vulnerabilities of pptp in combination with ms-chapv2 have been revealed, there...

Tags: VPNs, Network security, SECURITY, TELECOMMUNICATIONS, authentication, vpn server, PPTP, VPN, VPN client, ISAKMP, attacker

Discussion threads 2005-01-11

While you were X-Mas shopping, there was a PPTP trainwreck

While it's month old news, I'm just now realizing that we never surfaced an important report into Between the Lines that was written in December by ZDNet blogger George Ou. Ou unearthed a critical security weakness in one of the most commonly deployed methods for establishing virtual private networks...

Tags: George Ou. Ou, PPTP

Blog posts 2005-01-10

PPTP VPN authentication protocol proven very susceptible to attack

Later today, Joshua Wright will release an upgraded version of his ultra-high speed password cracking tool called ASLEAP . For those of you already familiar with ASLEAP, you might be wondering what this has to do with Microsoft's PPTP VPN protocol since ASLEAP is a LEAP authentication dictionary attack tool....

Tags: PPTP, password, ASLEAP

Blog posts 2004-12-17

Cryptanalysis of Microsoft's Point-to-Point Tunneling Protocol (PPTP)

The Point-to-Point Tunneling Protocol PPTP is used to secure PPP connections over TCP/IP links. In this paper we analyze Microsoft's Windows NT implementation of PPTP. We show how to break both the challenge/response authentication protocol Microsoft CHAP and the RC4 encryption protocol MPPE, as well...

Tags: PPTP, Microsoft Corp., VPNs, Network Security, Networking

White papers

Additional Resources

Linksys WRT610N Simultaneous Dual-N Band Wireless Router

Editor's note: Although our First Look video states that the WRT610N costs only $149, the street price may prove higher.The Linksys WRT610N Simultaneous Dual-N Band Wireless Router is the first true dual-band wireless router we've reviewed, and one of only a few on the market. In our tests, it easily...

Tags: Home networking, Routers & switches, Network technology, Network-attached storage (NAS), NETWORKING, wireless router, Storage Link, WRT610N, Linksys Inc., router, Linksys WRT310N, storage

Product reviews 2008-07-17

Labor Finders Gets Enterprise-Style Security at SMB Prices

Growing from a single office to 35 offices in a relatively short period of time presents special challenges, Labor Finders had legitimate concerns about competitors and others attempting to cause denial-of-service attacks. The customer database as well as employee database also required special treatment, since this information would be very...

Tags: Secure Computing Corp., Small And Medium Business, Smb/Sme, VPNs, Storage, Databases, Networking, Hardware, Enterprise Software, Software, Data Management

Case studies 2008-03-31

Cisco patches IOS vulnerabilities

Cisco patched multiple vulnerabilities on Wednesday with the most important fixes covering data-link switching, IPv6 and VPN flaws. Among the highest rated patches (all rated 7 or above on a 10 scale): Cisco patched multiple vulnerabilities in the Data-link Switching DLSw feature in its...

Tags: Cisco IOS, Device, Vulnerability, IP, Cisco Systems Inc., Security, Larry Dignan

Blog posts 2008-03-26

D-Link DGL-4500 GamerLounge Xtreme N Gaming Router

The D-Link DGL-4500 GamerLounge Xtreme N Gaming Router offers decent performance and a long list of features for home wireless networking and hardcore gamers. However, it lacks support for simultaneous 2.4GHz and 5GHz bands along with random resets during heavy loads. You may want to wait for a successor to...

Tags: Home networking, Routers & switches, Network technology, NETWORKING, Games, d-link DGL-4500, router, D-Link Systems, network

Product reviews 2008-02-26

Windows Server 2008 and Vista SP1 RTM today

Microsoft has reached a major milestone today for its Windows Server and Client products. Windows Server 2008 and Windows Vista Service pack 1 have been released to manufacturing today which means they will soon be available to IT customers and consumers. Windows Server 2008 replaces the venerable Windows...

Tags: Microsoft Windows Server, Microsoft Windows Vista, Microsoft Corp., Microsoft Windows Vista SP1, SSTP, Microsoft Windows, Microsoft Windows Server 2008, Microsoft Windows Vista (Longhorn), Operating Systems, Servers, Software, Hardware, George Ou

Blog posts 2008-02-04

Step-by-Step Guide: Deploying SSTP Remote Access

Secure Socket Tunneling Protocol SSTP is a new form of VPN tunnel with features that allow traffic to pass through firewalls that block PPTP and L2TP/IPsec traffic. SSTP provides a mechanism to encapsulate PPP traffic over the SSL channel of the HTTPS protocol. The use of PPP allows support for...

Tags: PPP, Traffic, Secure Socket Tunneling Protocol, Microsoft Windows, VPNs, Networking, Network Security, Microsoft Windows Server 2008, Security, Telecommunications, Operating Systems, Software

White papers 2007-12-01

Sir Richard Branson: VoIP "might be possible" on Virgin flights

Sir Richard Branson: VoIP "might be possible" on Virgin flightsVoIP On Virgin FLightsThis is a great idea. Mandate individual headsets that have mini-microphones that don't pick up peripheral sound; just the voice of the caller. This can be unobtrusive, very productive and a fabulous lure for passengers to...

Tags: Telephony, TELECOMMUNICATIONS, Sir Richard Branson, Virgin, VoIP

Discussion threads 2007-08-12

How to protect your online privacy

If you want to avoid being compromised when using typical Wi-Fi hotspots that have no security, you can use the following table as a reference of protocols you should and shouldn't use.  The insecure protocols should be banned and never used again; the protocols on the right are the secure...

Tags: Google Inc., Online Privacy, TCP, SSL, George Ou

Blog posts 2007-08-06

Rumor: iPhone to feature VPN and QuickLook

A rumor over at 9 to 5 Mac says that iPhone will ship with two previously-unannounced features when it ships next week: a VPN client: The iPhones will have the standard OSX VPN client when they ship next week.  This will allow connecting to Macintosh and Windows VPN Servers on...

Tags: Software, Rumor, iPhone

Blog posts 2007-06-22

Report: iPhone may have VPN client

Report: iPhone may have VPN clientNo VPN on launchVPN is critical, especially if they plan to have any impact on the email segment of the market and don't plan to license the blackberry email tools. Without a couple of VPN clients how can we expect to reach into our backoffice...

Tags: VPNs, Network security, TELECOMMUNICATIONS, VPN, VPN client, Apple iPhone

Discussion threads 2007-06-21

Big Mother (zip)

A switchsniff with absolutely zero configuration for mamas and papas doing parental Internet monitoring and control. Unlike spyware-based parental monitoring products that need "bug implantation," Big-Mother is an eavesdropping program that uses a switch sniffer to capture and analyze communication traffic over a home network. Version 2.41 includes PPTP packets.

Tags: Monitoring

Software downloads 2007-05-13

Why VPN can't replace Wi-Fi security

Every time the subject of wireless LAN security comes up, people ask me about VPN as a solution for securing Wi-Fi (Wi-Fi is the common marketing name for 802.11 wireless LANs). Ive always told people that VPN security shouldnt be a substitute for good Wi-Fi security and I even...

Tags: Wireless LANs, Wireless security, VPNs, Network security, WIRELESS, Wi-Fi, VPN, Wi-Fi security, WPA, WEP

Blog posts 2007-05-12

Wireless LAN security myths that won't die

Its been two years since I wrote "The six dumbest ways to secure a wireless LAN," and its probably been one of my more successful blog entries ever, with two flashes on Digg. Since that time, Ive written a free electronic book on enterprise wireless LAN security for anyone to...

Tags: LANs, Wireless LANs, Wi-Fi, security, wireless-LAN security, WLAN, wireless

Blog posts 2007-03-26

Cryptography interview with the NSA

Cryptography interview with the NSAwhats funny is...I'm currently reading Dan Brown's "Digital Fortress" all about the NSA and TRANSLTR (their 2 million core public key crunching monster) and crypto labs.. Its a good read :)Good ReadNice to know where the flaws are in the system. And Snow is right....

Tags: SECURITY, Network security, Rainbow Tables, password, NSA, cryptography

Discussion threads 2007-01-04