The only time I seen the web proxy filter (application filter) dissapear, is when the protocol in question has the show only selected application filters box checked, and subsequently no application filters were enabled on that protocol. Is that what's going on in your environment?
Or in the Configuration -> Add-ins -> Application Filters tab, did the web proxy filter get disabled?
From: Lebanese in Kuwait
This is caused by you disassociating the Web Proxy filter from the HTTP protocol. In the HTTP protocol that you have in your rule, go into the Toolbox\Protocols and in the properties of that protocol, re-associate the Web Proxy filter.
Yes, when we selected "web proxy" at http protocol, it's appeared again. Thanks.
Is it total enable web proxy client function after this?
Today, we're tried 2 firewall policy which is following tutorial here & support.microsoft - 1) Blocking MSN Messenger Access through the ISA Firewall while Enabling Access to Some Users + Full Web Access 2) How to block MSN Messenger traffic and Windows Live Messenger traffic by using ISA Server
No matter which one policy is selected, it seems not enable block function what's applied.
The existing firewall policy is default setting by system only, we're about 10 users & 2 of applied firewall client(to asset more power access), how can we find out problem & apply ISA policy?
* The reason why we're trying to bypass web proxy as our tech spport vendor said not to enable web proxy at SBS server that will slow down performance, is it correct?