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Error Code 64: Host not available + ISA 2004 on SBS 200... - 20.Apr.2008 11:46:49 PM

Ardy

Posts: 2
Joined: 20.Apr.2008
Status: offline

Lately, the users in my company has noticed that there are a small number of websites that they are not able to connect to. Normally it comes up with the following error message:

Explanation: The request timed out before the page could be retrieved.

Try the following:

Refresh page: Search for the page again by clicking the Refresh button. The timeout may have occurred due to Internet congestion.
Check spelling: Check that you typed the Web page address correctly. The address may have been mistyped.
Access from a link: If there is a link to the page you are looking for, try accessing the page from that link.
Contact website: You may want to contact the website administrator to make sure the Web page still exists. You can do this by using the e-mail address or phone number listed on the website home page. If you are still unable to view the requested page, try contacting your administrator or Helpdesk.

Technical Information (for support personnel)

Error Code 64: Host not available
Background: The gateway or proxy server lost connection to the Web server.
Date: 4/21/2008 3:29:42 AM
Server: server.domainname.local
Source: Remote server

I am using a Windows Small Business Server R2 with ISA 2004 installed on it.

I have tried the following:

1. Set: HKLM\System\CurrentControlSet\Services\TCPIP\Parameters\EnablePMTUDiscovery to 1 and then rebooted the server.

2. Run: dnscmd /Config /EnableEDnsProbes 0

3. Added the url on the "allow HTTP/HTTPS from ISA server to specofoed sites" under the system policy.
4. I have also added the URL to the tursted site list

None of these solutions fixed the issue. Can anyone help? Thank you.

Post #: 1

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RE: Error Code 64: Host not available + ISA 2004 on SBS... - 21.Apr.2008 9:35:55 AM

Rotorblade

Posts: 861
Joined: 27.Feb.2007
Status: offline

Hi,

Sounds like known issues with ISA compression filter. Try disabling it to see if the problem goes away.

http://support.microsoft.com/kb/944114/

HTH

RB

_____________________________

David Melvin
Ohio
MCSE: Security 2003, MCSA:Security 2003

(in reply to Ardy)

Post #: 2

RE: Error Code 64: Host not available + ISA 2004 on SBS... - 21.Apr.2008 8:24:40 PM

Ardy

Posts: 2
Joined: 20.Apr.2008
Status: offline

Disabling the compression filter fixed the issue. Thanks for the help.

(in reply to Rotorblade)

Post #: 3

RE: Error Code 64: Host not available + ISA 2004 on SBS... - 23.Apr.2008 5:06:15 PM

elmajdal

Posts: 4959
Joined: 16.Sep.2004
From: Lebanese in Kuwait
Status: offline

what service pack do you have on your ISA Server

_____________________________

Tarek Majdalani

MS Forefront Edge Security MVP
Website : http://www.elmajdal.net/ISAServer
New Section : http://www.elmajdal.net/Win2k8

(in reply to Ardy)

Post #: 4