Have had NBM 3.8 servers running for 3 or more years.
5 servers involved.
All worked perfectly until the weekend. Nothing changed here.

The problem is the proxy.
Can get to some sites OK, others not at all.
Have cleared the cache and the DNS cache and rebooted.

I have static addressed on PC and created NAT exceptions for it for http
and https. It can reach all of the problem sites.

Also have a SuperLumin proxy server running for 2 months which will
replace the NBM server. Currently it is NAT'd thru the NBM server and
has been working perfectly until the weekend. It now has the same problems.

Have been in constant contact with our ISP. They say that our traffic
does not go thru any devices that have had recent changes.

Any ideas?