[vpn-help] Connecting to VPN Servers Through ISA Server

[Greg Wilkerson]

Hello,

 

Here is my configuration: Windows 7 x64 Ultimate running ShrewSoft 2.1.5 on
a laptop.

I am connecting to a Cisco VPN Server (don't know much more than that).  The
connection definition for one was manually created from values provided to
me.  Another connection was configured by importing a PCF.

 

I have no troubles connecting to either of these VPN servers and accessing
all the resources on the networks when connected via wi-fi hotspots, etc.  

 

I do have troubles when connecting to these environments from my office.  I
have an ISA Server 2003 as my firewall.  The ISA server logs show no
denials.  Actually, I see no messages in the log related to ShrewSoft
connections (port 500, 4500) in the ISA server logs.  When I connect to
either of these environments from an XP desktop with the Cisco VPN client
(5.00.360) located at my office, I have no troubles.  So, that seems to rule
out port issues on my office network.  Since I can connect to these clients
using my laptop and the ShrewSoft client when not in my office, that would
seem to rule out port issues on my laptop.  So, that leaves the specific
configuration of using ShrewSoft from within my office and going through an
ISA server.  I have no issues with configuring the appropriate ports, but I
have no idea what to configure.

 

I have examined the ShrewSoft log files.  I compared the log files from a
successful connection to a failed connection.  The most prominent text to
note was multiple (4, I think) attempts to connect to the VPN server using
port 500, for failed attempts.  I see only a single port 500 connection
attempt made for successful connections.  This would suggest port 500
issues, but I do not see a denial (or an allow) for port 500 in the ISA
server firewall logs.

 

I'm just trying to figure out what to do to make this work from within my
office.

 

Anybody have any suggestions?

 

Thanks,

 

Greg Wilkerson

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