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ISA 2006 Seems to block whatever it likes..

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ISA 2006 Seems to block whatever it likes.. - 6.Jun.2007 2:43:58 PM   
RTemple7474

 

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Joined: 6.Jun.2007
Status: offline
I have just setup the 2006 ISA server as a web proxy.  It seems to be blocking certain websites, for instance, this site. I have a webproxy rule setup to allow HTTP, HTTPS, FTP, but i revieve the following error on some sites...

Error Code: 502 Proxy Error. The ISA Server denied the specified Uniform Resource Locator (URL). (12202)

Has anyone else seen this yet? I can access msn.com, espn.com, drudgereport.com, but cannot access ISAserver.org, MSExchange.org.  Maybe ISA doesn't want me to view technical websites  Any help would be great appreicated.
Post #: 1
RE: ISA 2006 Seems to block whatever it likes.. - 21.Jun.2007 10:48:02 AM   
dmecha

 

Posts: 27
Joined: 18.Sep.2006
Status: offline
It alsso happens to me but only sometimes. Today it happened while surfing isaserver.org but as you can se later I can access.

(in reply to RTemple7474)
Post #: 2
RE: ISA 2006 Seems to block whatever it likes.. - 22.Jun.2007 5:22:34 AM   
ITEngineer

 

Posts: 270
Joined: 3.Feb.2006
Status: offline
what rules you've made on ISA Server  ?

(in reply to RTemple7474)
Post #: 3
RE: ISA 2006 Seems to block whatever it likes.. - 22.Jun.2007 5:34:14 AM   
dmecha

 

Posts: 27
Joined: 18.Sep.2006
Status: offline
Basically, reviewing logs the one which is blocking me is one called Full outbound. This rule allows http, https and FTP to me and the logs said connection denied, rule Full Outbound.

I canīt understand why an "allow rule" is blocking.

(in reply to ITEngineer)
Post #: 4
RE: ISA 2006 Seems to block whatever it likes.. - 22.Jun.2007 7:42:13 AM   
ITEngineer

 

Posts: 270
Joined: 3.Feb.2006
Status: offline
maybe you set an HTTP filter on this allow rule !

provide more info about your rules, if you can upload images it would be much better.

(in reply to dmecha)
Post #: 5
RE: ISA 2006 Seems to block whatever it likes.. - 27.Jun.2007 5:42:18 AM   
dmecha

 

Posts: 27
Joined: 18.Sep.2006
Status: offline
Sorry for the delay in the answer, Iīve been trying to discard the HTTP filter as the cause of my trouble. I disabled it.

Now I think that the cause can be the Automatic detection settings for FW client.
I have added WPAD entry in DHCP with a value http:\\proxyserver\wpad and have a DNS entry for proxyserver pointing to my ISA.
It is working properly in other ISA servers in my domain.

For the ISA server with the error, only works if I uncheck automatically detect setting and use the script;  and so only checking the third option (Use a web proxy server).

The error 12202 still is related to my "Full Outbound rule".

Any ideas?

(in reply to RTemple7474)
Post #: 6

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