SP2 and Cisco VPN client


D

David

With the no exceptions allowed in the Windows firewall, I can connect using
the Cisco vpn client using the udp transport. I cannot seem to put together
a combination that will allow me to connect via TCP from the same client. I
have tried allowing exceptions for TCP port 10000, which works with the
firewall off. I have tried allowing an exception for the VPN Client.
Neither of these works.
 
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T

Torgeir Bakken \(MVP\)

David said:
With the no exceptions allowed in the Windows firewall, I can connect using
the Cisco vpn client using the udp transport. I cannot seem to put together
a combination that will allow me to connect via TCP from the same client. I
have tried allowing exceptions for TCP port 10000, which works with the
firewall off. I have tried allowing an exception for the VPN Client.
Neither of these works.
Hi

Enable firewall logging and analyze the log file:

Troubleshooting Windows Firewall settings in Windows XP Service Pack 2
http://support.microsoft.com/default.aspx?kbid=875357

A much more detailed version:
Troubleshooting Windows Firewall in Microsoft Windows XP Service Pack 2
http://www.microsoft.com/downloads/...46-131d-4617-bf68-f0532d8db131&DisplayLang=en


More about the firewall:

Description of the Windows Firewall feature in Windows XP
Service Pack 2
http://support.microsoft.com/default.aspx?kbid=843090

Understanding Windows Firewall/Introduction
http://www.microsoft.com/windowsxp/using/security/internet/sp2_wfintro.mspx

The Cable Guy - February 2004
Manually Configuring Windows Firewall in Windows XP Service Pack 2
http://www.microsoft.com/technet/community/columns/cableguy/cg0204.mspx

How to use the Security Alert dialog box in Windows XP Service Pack 2
http://support.microsoft.com/default.aspx?kbid=875353


Windows XP Service Pack 2 problems/The Service Pack 2 firewall
http://www.michna.com/kb/WxSP2.htm#The_Service_Pack_2_firewall

JMF's XP Service Pack 2 Page
http://jmfmvps.mvps.org/SP2.htm
 
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S

Steve Riley [MSFT]

I haven't seen all the thread here, so I'm not sure what the actual problem
is. I'll guess that the Cisco VPN client stopped working after you upgraded
to SP 2.

This is a common problem with many third-party VPN clients; they often hook
into the stack using undocumented or deprecated calls. If the service pack
removes those DLL interfaces, the VPN client stops functioning. Check with
Cisco to see if they've updated their client software.

Steve Riley
(e-mail address removed)
 

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