Error Code 11001 Host Not Found Microsoft
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Socket Error 11001 Host Not Found Windows 7
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edwaltMarch 27, 200614 0 0 0 So heres the deal. You have clients behind ISA 2004, trying to browse to a redirecting website. The site starts with an http connection, the user is prompted to logon, error 11001 no such host is known or the site redirects to a more secure connection
Socket Error 11001 Host Not Found Prtg
workedBEFORE installing ISA 2004 Service Pack 2. Hmmmmmmm. When trying to connect to the https portion of the site various errors are returned: 400 bad request. 11001: host not found. http://%20 example .comom Why is this happening? It appears the problem is caused because ISA will add spaces between some headers and their values. If this happens some webservers see the space https://support.microsoft.com/en-us/kb/2790765 as the beginning of the hostname. Theserver then redirects the browser to a website that begins with a space that fails. The browser then fails because it cannot access the malformed URL. How do I fix this? Open ISA Server Management Configuration Add-Ins Web Filters Properties of the "Compression filter" - Uncheck "Enable this filter" Properties of the "Caching compressed content filter" -Uncheck "Enable this filter" Select Apply at the top of the screen to apply the https://blogs.technet.microsoft.com/edwalt/2006/03/27/11001-host-not-found-what-it-was-there-earlier/ changes. >edwalt
Comments (14) Cancel reply Name * Email * Website Jason O'Rourke says: September 7, 2006 at 5:19 pm Buddy, seriously, thank you so much for this information, it helped me heaps. I had a similar error which I had troubleshot for a day and had eventually gained enough info to find this page, and your advice fixed the problem. Same thing, prob appeared after SP2, but I had different error messages. Was causing alot of frustration and I couldn't find help anywhere. ISA logs weren't providing useful data either :o/ Cheers mate! Jason - AU Reply zxevil135 says: March 1, 2008 at 2:11 am vRH8of r u crazzy? I told u! I can't read! Reply zxevil135 says: March 1, 2008 at 2:11 am smO1hF r u crazzy? I told u! I can't read! Reply zxevil135 says: March 1, 2008 at 2:12 am ftytUb r u crazzy? I told u! I can't read! Reply zxevil136 says: March 2, 2008 at 12:24 am VYf1dI r u crazzy? I told u! I can't read! Reply zxevil134 says: March 7, 2008 at 2:00 am QQW3qq r u crazzy? I told u! I can't read, man! Reply zxevil141 says: March 7, 2008 at 5:04 am GO69py r u crazzy? I told u! I can't read! Reply zxevil150 says: March 7, 2008 at 10:50 pm p3ewJy r u crazzy? I to| Address Book | Member List | Search | FAQ | Ticket List | Log Out Error Code 11001: Host not found Users viewing this http://forums.isaserver.org/Error_Code_11001%3A_Host_not_found/m_2002100176/tm.htm topic: none Logged in as: Guest Tree Style Printable Version All Forums http://microsoft.public.isa.narkive.com/wI3N3azs/error-code-11001-host-not-found >> [ISA Server 2004 Firewall] >> General >> Error Code 11001: Host not found Page: [1] Login Message << Older Topic Newer Topic >> Error Code 11001: Host not found - 20.Apr.2010 5:56:56 AM ellisramkumar Posts: 30 Joined: 8.May2007 Status: offline Dear All, We are receive the Following error host not when we are trying to open www.microsoft.com but i can open www.hotmail.com. Error: Technical Information (for support personnel) Error Code 11001: Host not found Background: This error indicates that the gateway could not find the IP address of the website you are trying to access. This is usually due to a DNS-related error. Date: 4/11/2010 9:45:11 AM Server: domain.com Source: DNS error We host not found are Using ISA 2004 Could you please help me this issue Thanks Post #: 1 Featured Links* RE: Error Code 11001: Host not found - 20.Apr.2010 6:30:16 AM Jason Jones Posts: 4663 Joined: 30.Jul.2002 From: United Kingdom Status: offline How is DNS configured within your environment and on the network cards? _____________________________Jason Jones | Forefront MVP | Silversands Ltd My Blogs: http://blog.msedge.org.uk/ and http://blog.msfirewall.org.uk/ (in reply to ellisramkumar) Post #: 2 RE: Error Code 11001: Host not found - 20.Apr.2010 8:04:23 AM ellisramkumar Posts: 30 Joined: 8.May2007 Status: offline Dear Jason Jones, It was like follows: for Internal nic - Local DNS Setting and external nic - ISP DNS Setting, but today only i changed the external DNS setting same like Internal DNS setting as per some expert comment, but no use. Thanks < Message edited by ellisramkumar -- 20.Apr.2010 8:10:20 AM > (in reply to Jason Jones) Post #: 3 RE: Error Code 11001: Host not found - 20.Apr.2010 8:21:32 AM paulo.oliveira Posts: 3472 Joined: 3.Jan.2008 From: Amazon, Brazil Status: offline Hi, you should configure your ISA NICs as following: http://blog.msedge.org.uk/2010/04/recommended-network-card-configuration_14.html Rega
get the following error message:Error Code 11001: Host not foundBackground: This error indicates that the gateway could not find the IPaddress of the website you are trying to access. This is usually due to aDNS-related error.Date: 10/10/2006 14:47:57Server: bekiisa1.ki.comSource: DNS errorError Code 11001: Host not foundSetup:- ISA Server2004 Edge firewall SP2 - Webproxy clients- I think it's not a DNS error, I'm able to resolve the name on our DNSserver.- I've disabled the compression, diffserv, http filter but still the sameerror.Thx. s***@hotmail.com 2006-10-10 19:46:02 UTC PermalinkRaw Message Post by NikCertain websites not accessible e.g.www.nextiraone.bewww.macline.beError Code 11001: Host not foundBackground: This error indicates that the gateway could not find the IPaddress of the website you are trying to access. This is usually due to aDNS-related error.Date: 10/10/2006 14:47:57Server: bekiisa1.ki.comSource: DNS errorError Code 11001: Host not found- ISA Server2004 Edge firewall SP2 - Webproxy clients- I think it's not a DNS error, I'm able to resolve the name on our DNSserver.- I've disabled the compression, diffserv, http filter but still the sameerror.Thx.I would run a couple of checks if i were you:1) Check if the sites are accessible on the ISA box itself. First checkif the names are resolvable.2) Access the sites based on their IP addresses both on the ISA box andclients. Nik 2006-10-18 12:48:21 UTC PermalinkRaw Message I'm able to resolve the names on the ISA server.Strange enough the websites are accessible from a client, why I don'tknow??? But it's working now. When I had the problem I was also able toresolve the names on the ISA.Post by NikCertain websites not accessible e.g.www.nextiraone.bewww.macline.beError Code 11001: Host not foundBackground: This error indicates that the gateway could not find the IPaddress of the website you are trying to access. This is usually due to aDNS-related error.Date: 10/10/2006 14:47:57Server: bekiisa1.ki.comSource: DNS errorError Code 11001: Host not found- ISA Server2004 Edge firewall SP2 - Webproxy clients- I think it's not a DNS error, I'm able to resolve the name on our DNSserver.- I've disabled the compression, diffserv, http filter but still the sameerror.Thx.I would run a couple of checks if i were you:1) Check if the sites are accessible on the ISA box itself. First checkif the names are resolvable.2) Access the sites based on their IP addresses both on the ISA box andclients. "Phillip Windell" <@.> 2006-10-18 14:18:33 UTC PermalinkRaw Message DNS config should not be allowed to become "haphazzard".It needs to be done according to this pattern:1. All machines (ever