VPN Connection drops unexpectedly

VPN Connection drops unexpectedly

Post by khnp9 » Wed, 24 Dec 2003 04:23:45


I have two users whose VPN connection to my firewall gets dropped
after been connected for 5 to 10 minutes and whenever a large amount
of throughtput is put through the vpn connection. Lately, I noticed
that it happens wether there is activity or not in the connection.

The users are using Windows 2000 professional (SP4) and winxp pro over
DSL connections.

The vpn is initiated by the user to our Watchguard 1500 firebox. Once
the firebox authenticates the user and the user starts synchronizing
data, the VPN drops and no indication is given in the user side that
the connection dropped.

We have been using VPN for years and from a large variety of systems
with different operating systems including those that these two users
have installed. Also, our users use dial-up, t1, cable modem and dsl
to connect. Up to about a month ago, I had never experienced any
problems with the vpn connection other than normal user mistakes. THe
only diferences are a move from a WinNT 4.0 SP6 domain/pdc to a
win2003 with active directory domain/pdc server. This issue is
absolutely crazy. The two users with the problem are new users to the
vpn and the old users are not experiencing any difficulties
connecting.

Watchguard information on the subject is to say the least non
existent.

Have anybody seen this problem before.

THanks for the help you may provide.
 
 
 

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