[isalist] IPSEC Site-2-Site Problem (connections dropping)
- From: "Crisp, Paul \(UK\)" <pcrisp@xxxxxxxxxxxxxxxxx>
- To: <isalist@xxxxxxxxxxxxx>
- Date: Thu, 2 Aug 2007 08:31:55 +0100
Hi all,
Its been a long time but that shows you how good ISA is :)
OK, Got a IPSEC with pre-shared key site-2-site all working. The remote
end is using a Nokia Checkpoint firewall but hey, that's there loss :)
Anyway down to the problem.
As i say the link is working fine for the most part and we have remote
users on the other site running Outlook, RDP SQL Enterprise Manager and
connecting to resources in our site without issue apart from every now
and then and by no means on a daily basis a random client who is
connecting to us will not be able to ping a host in our network or their
application fails with a disconnect
The explain this further, imagine User A in remote site running Outlook
in cached mode all fine and then they will be suddenly disconnected. OK
no probs, run some ping tests to our Exchange server on the local site
and requests are timed out, ping any other host in the same subnet of
the Exchange server and all reply ok. This happens for about 20-25mins
and then all of a sudden things reply and Outlook runs fine until the
next time it fails. The next time could be later that day or could be a
couple of days away.
As I said previously this is not necessarily an Outlook / Exchange
problem as we have other people using SQL Enterprise Manager and then
all of a sudden they are disconnected. Again perform some ping tests and
we get timed out to the SQL server but all other hosts in the same
subnet are ok.
One further thing, the server that is not responding, if I remote
control that server (i'm in the same subnet as server) i can ping and
get replies from the non-working clients on the other side of the VPN
Anyone got any clues?
btw
Running ISA 2004SE on Windows 2003
Cheers all
Paul Crisp
Snr Network Support Analyst
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