Blocked ports on ADSL connection.
Posted on 2006-04-19
I have a remote user who’s Citrix connection has stopped working but still has regular Internet access with other problems.
A notebook that usually works with Citrix is also having the same problem at the same remote site.
I suspect that the Citrix port 1494 is being blocked by the ADSL carrier (British Telecom) as the ISP Demon Internet have no idea what’s going on.
How can I prove where the connection is being blocked? I have tried a port scanner which just tells me is it can see a port or not. Ping just says destination net unreachable
C:\>pathping -routers IP address-
Tracing route to client.com [client router IP address]
over a maximum of 30 hops:
0 apc [Local PC IP address]
1 demon-gw.hmg2.com [Local router IP address]
2 anchor-hg-3-l100.router.demon.net [22.214.171.124]
3 anchor-hg-3-l100.router.demon.net [126.96.36.199] reports: Destination net unreachable.
It looks to me that 188.8.131.52 or what’s behind it is blocking my Citrix traffic as well.