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- 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
- PIX PPTP VPN
- HiI have configured pptp on a PIX 506E ver 6.2(2)The PPTP terminates ok on the PIX but vpn clients can't access any resources on the LAN no icmp ping reply either. I have remove use default-gateway on remote from PPTP client and still doesn't workAny ideas?Here is the config.Building configuration...:...
- Tags: TCP/IP, NETWORKING, VPNs, Network security, Network technology, roppong@..., VPN, X.X.X.X, TCP, PPTP, IP
- Discussion threads 2007-11-08
- VPN
- I CONNECTED VPN THROUGH PPTP, AFTER SUCCESSFULLY LOGON VPN BY PPTP FIRSTLY MY INTERNET WAS NOT WORKING AFTER CHANGE SETTING IN PPTP PROPERTIES I CAN ACCESS INTERNET. AFTER THAT BUT NOW I CANNOT PING PPTP PROXY.PLS SUGGEST
- Tags: VPNs, Network security, INTERNET, harishmanju08@..., PPTP, VPN
- Discussion threads 2007-10-10
- PPTP VPN through a Cisco PIX
- Ok, here is my dilemma, I've been trying to setup a simple PPTP VPN at our office so a few employees can VPN to our server once they move. Internally, the connection works perfectly, so I know the issue is with the traffic being routed through our firewall. ...
- Tags: TCP/IP, NETWORKING, VPNs, Network security, Network technology, E-mail, Cisco Systems Inc., OK Here, Cisco PIX Firewall, jdaly@..., WHS, X.X.123.197, pdm location, PPTP, IP, TCP
- Discussion threads 2007-09-18
- pptp is shutting down my local network access to the machine
- I have two machines on my local netork, i attach to a pptp network as a workstation on machine A, now i can still access machine B from machine A, but if i go on machine B i can not access machine A, can not even ping it. I...
- Tags: VPNs, Network security, network, randy-e@..., PPTP
- Discussion threads 2007-09-13
- Why can't I access LAN resources on PPTP
- I can easily connect and surf around ping google, but when I try pinging a local computer on the VPN it says timeout. This all started not working when I switched from my Linksys router to a pfSense box, any idea on how to make the LAN resources work ie....
- Tags: VPNs, Network security, NETWORKING, TELECOMMUNICATIONS, PPTP, admin@..., Primært DNS-suffiks, VPN, LAN
- Discussion threads 2007-08-09
- DNS over PPTP
- I recently updated the PIX Firewall version on two PIX515E's from 6.3(2) to 6.3(5). After the upgrade, a limited number of PPTP clients were no longer able to resolve internal DNS. On these hosts, all DNS queries while connected to the VPN use external DNS; despite IPCONFIG /ALL indicating otherwise....
- Tags: VPNs, Domain names, Network security, NETWORKING, Network technology, mjfera@..., PPTP-VPDN-GROUP ppp authentication, PPTP, DNS, PPTP client, IP
- Discussion threads 2007-08-03
- Cisco 506e PPTP Problem
- Hello everyone. I successfully configured a Cisco 506e to allow me access to the internet as well as VPN clients to logon and use the tunnel to touch local clients.The problem, however, is that the client that opens the tunnel CANNOT surf the internet or do anything in his...
- Tags: VPNs, NETWORKING, Network security, Network technology, TELECOMMUNICATIONS, Cisco Systems Inc., leo.negron@..., PPTP, IP, VPN, ip audit, PPTP-VPDN-GROUP ppp authentication, VPN 255.255.255.0, audit
- Discussion threads 2007-07-09
- Watchguard pptp for mobile user vpn on vista or mac
- I need to connect VPN from a Vista system and a Mac system. Is it possible to setup the connection using pptp rether than ipsec?
- Tags: VPNs, Network security, NETWORKING, SECURITY, dick@..., PPTP, VPN
- Discussion threads 2007-06-29
- PPTP VPN port 4545 access
- We have a high end D-Link VPN router. We want some equipment within the internal network to send a TCP message on port 4545 to a workstation connected through PPTP VPN. Unfortunately we cannot even ping the outside workstation from the inside. Is this a PPTP thing...
- Tags: VPNs, Network security, TCP/IP, curtisf@..., PPTP connection, PPTP, GRE, PPTP VPN
- Discussion threads 2007-06-27
- PPTP VPN connection issue
- Hi,I'm having trouble understanding the folowing connectivity issue. Using Windows Server 2003 RRAS PPTP VPN lets call this the office, connecting to this from a remote location homeusing an XP client over an ADSL Modem / Router.I can connect with the Office network browse the LAN or ping any...
- Tags: Network technology, NETWORKING, admin@..., PPTP
- Discussion threads 2007-06-28
- VPN access with cisco Sb-101
- Hello,I am have a Cisco Sb-101 routerfirewall at one of my locations. I am looking to setup VPN access through PPTP. I have ran the RAS setup on the server and configured for remote access, when the firewall on the cisco is enabled I can not connect,...
- Tags: VPNs, Network security, Routers & switches, Network technology, NETWORKING, jboyle@..., PPTP, GRE, router, Cisco Systems Inc., VPN
- Discussion threads 2007-05-21
- Problem w/Mapping a Drive Over a PPTP VPN Connection
- My neighbor just started a small business. At his business location, he has an XP Pro desktop. The XP Pro machine is connected to one of 4 Ethernet switchports on a Netgear FVS114 VPN router. (It's the only PC on his store network.) The FVS114's "Internet" Ethernet port is in...
- Tags: Microsoft Windows XP, Desktops, VPNs, Ethernet, Network security, richard.f.toomey@..., Microsoft Windows XP Professional, PC, PPTP
- Discussion threads 2007-03-30
- 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
- Remote Access: PPTP VPN with OpenBSD Tutorial, part 1
- I need some helpHi...My name is Carlos Balanzario, im from mexico city...Im trying to apply this tutorial to my OpenBSD, actually i do every step that u mencioned at the tutorial, but when im trying to connect with my Windows client it doesnt wo
- Tags: networking, carlos.balanzario@..., IM, OpenBSD, PPTP, remote access
- Discussion threads 2006-11-13
- Learn to install and configure a PPTP VPN connection with open source Poptop
- This tutorial, by Financial Services IT blogger Justin Fielding, will show you how to implement a VPN connection using the open source Poptop PPTP server solution for Linux. In this article, I'll cover the configuration of a VPN implementation using the Point-to-Point Tunnelling Protocol PPTP. This allows...
- Tags: OpenBSD, PPTP, VPNs, UNIX, Justin Fielding, Operating systems, Network security, open source, PopTop, Financial Service IT Newsletter, VPN, IP, Connection, Kernel, Networking, Software
- Technical articles 2006-01-26
- Remote Access: PPTP VPN with OpenBSD, part 2
- Proxy arp not workingHi, I followed the setup instruction to setup a PPTP VPN to an OpenBSD LAN gateway/firewall. Still, I could not make it work when assigning IP addresses from the same LAN subnet to the clients.To be more specific, the LA
- Tags: arp, LAN, networking, networking poptop openbsd arp, OpenBSD, oscar_ross@..., PPTP, remote access, subnet
- Discussion threads 2006-10-28
- Need help with pptp on Win2k PLEASE!
- http://techrepublic.com.com/5208-11184-0.html?forumID=39&threadID=201189&start=0I have a TQ&A open on this, but am running out of time to get this resolved.I have a system with a clean install of Win2k Pro SP4, roll up, and all other patches are applied.I NEED to setup a pptp connection, but when I go into he new connection...
- Tags: jd-quick (formerly clyde), jdclyde, Microsoft Windows 2000, modem, PPTP, RRAS, TCP/IP, VPN, win2k, windows
- Discussion threads 2006-09-21
- Need to setup pptp on Win2k workstation
- Windows 2000 pro, SP4, fully patched, new install.Works nicely, has full internet connectivity.Need to setup vpn, but when I go into the New connection wizard, only dial-up to internet and accept incoming connections is available. All others are grayed out.I looked in the properties to add a protocol, but...
- Tags: jd-quick (formerly clyde), jdclyde, Microsoft Windows 2000, new connection, PPTP, VPN, windows, workstation
- Q&A 2006-09-19
