How do I allow MSN Messenger through a downstream proxy (ISA Server 2006)?
Posted on 2006-11-16
We have two ISA 2006 servers, one is acting as a proxy server (S-Proxy) and the other is our firewall (S-WS)
S-Proxy connects upstream to S-WS (web chain rule) for its internet connection.
I am unable to get MSN Messenger to work when using S-Proxy as the proxy server. I have tried this with and without the firewall client. (Firewall client is enabled on S-Proxy and firewall chaining is configured to look at S-WS)
I have a rule on S-Proxy which allows web ports and msn port 1863 from internal to internal (i.e. from S-Proxy to S-WS) for "All Authenticated Users".
I have a rule on S-WS which allows web ports and msn port 1863 from S-Proxy and S-WS to the internet for "All users"
I have also tried setting up a rule on S-Proxy to allow all ports from internal to internal for "All users" to see if it is an authentication issue but that didnt work either.
Any ideas what I am missing or doing wrong?