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Getting "host not found 11001" error...

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Getting "host not found 11001" error... - 16.Apr.2011 3:07:04 PM   
hit123

 

Posts: 2
Joined: 3.Mar.2011
Status: offline
Hi all, I got a dumb issue on a ISA 2006 SP1 server. On different websites I just get the following error message: "Error 11001: Host not found", "The IP address of the website couldn't be found, this is mostly caused by an DNS error". It is propably only a missconfiguration in the network, but I got no idea (I never worked with a ISA yet). The ISA is configured as an Edgefirewall and proxy with 2 NICs and a router:

INTERNAL NIC:
IP: 192.168.0.253
DNS1: Internal DNS server
DNS2: External provider DNS
GATEWAY: N/A

EXTERNAL NIC:
IP: 192.168.2.253
DNS1: IP router
DNS2: External provider IP
GATEWAY: IP router

If I log a connection, I just get this event in the logs:
Port:80
Protocoll: http / failed connection
Description: [System] HTTP/HTTPS request to ISA server to selected server
From: Client
To: External
Type: GET

The DNS is nowhere blocked. How can I solve that problem? I already tried a lot of solutions, but nothing helped yet.
Post #: 1
RE: Getting "host not found 11001" error... - 16.Apr.2011 4:03:31 PM   
stevenrix

 

Posts: 101
Joined: 16.Feb.2011
Status: offline
Remove all the external DNS on both cards and no DNS at all for the external interface.
Check your DNS server also to see how it is configured.
Then you have to authorize DNS on a network rule inside ISA/TMG.

(in reply to hit123)
Post #: 2

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