I need some ideas about how to solve a problem accessing a certain website.
I am the IT staff for a small medical office. Six pc's all running Windows 7 Pro in a peer-to-peer network.
I can remotely login to their system using LogMeIn.
- Occasionally it becomes impossible to access the web site “www.comcast.net”
. The error message received is “server not found”. However, I can successfully access the web site from my home computer. This problem lasts for about 24 hours then mysteriously solves itself.
The firewall is a ZyWALL USG 50. I have checked it and there are no instructions in it to block any website.
So, it is a big mystery to me as to why only 1 web site is blocked on what seems a random basis.
I wonder if it some problem withing the Comcast.net web site which causes problems?
Q1.) What steps would you take to troubleshoot this problem?
Q2.) Since there is no server involved and the firewall is the DNS server, what thoughts do you have about changing the dns ip address so it uses Open DNS?