Hi Lonk,

No I specifically set the proxy server for Firefox. Its not using the system settings choice in Firefox.

I am not sure how having the FQDN instead of just the host name would affect things. the proxy server is set to that the clients look up the host name of the server, and the dns server points to the proxy server which has the same domain name as the windows network. However I just used the host name in Firefox not the entire FQDN which should not be necessary as its in the Dns server.

I could try putting the domain name in the local intranet zone and see if this makes any difference. However as all my clients are on windows 7, I will just upgrade IE to version 11 and this will fix the issue. But I could try your settings out if I get the ISP services for one client who are still using windows xp (shudder)!

Thanks for the feedback.