Hi all. The problem I am reporting is not very clearly evident to me. I have a virtualization setup where in I had configured in 4 virtual machines (which serve 4 different websites) available to internet via a Reverse Proxy on the Host OS (bare metal) I use Ubuntu 10.04 64 bit server edition and kvm for this setup.
We have not changed any of the server configurations from past 6 months since things were working properly without any problem on this server. The sites are available to people as http://site1.myserver.com <-- No problem http://site1.myserver.com/app1 <-- Gives problem till weekend there was no problem http://site4.myserver.com <--Is also giving problem till this Sunday 9 Jan there were no problem. Here are the error messages which I see in Apache logs Mon Jan 10 17:07:05 2011] [error] [client 172.21.100.250] proxy: DNS lookup failure for: site4.myserver.com returned by / [Mon Jan 10 17:07:06 2011] [error] [client 172.21.100.250] proxy: DNS lookup failure for: site4.myserver.com returned by / and for site1.myserver.com/app1 also I get same error [Mon Jan 10 17:06:01 2011] [error] [client 172.21.100.250] proxy: DNS lookup failure for: site1.myserver.com returned by /app1/ [Mon Jan 10 17:06:01 2011] [error] [client 172.21.100.250] proxy: DNS lookup failure for: site1.myserver.com returned by /app1/ [Mon Jan 10 17:06:02 2011] [error] [client 172.21.100.250] proxy: DNS lookup failure for: site1.myserver.com returned by /app1/ How ever when some one tries to access http://site1.myserver.com there is no error at all. Also if I access http://site5.somebody_server.com (which is same as http://site4.myserver.com pointing to same public IP) but on some body elses server then there is no problem at all and the site is very clearly visible. Let me know what more should I look for I have no clue of this problem. Because these error messages which I just report in this thread were not at all present until today morning. -- -- ubuntu-server mailing list ubuntu-server@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-server More info: https://wiki.ubuntu.com/ServerTeam
