We've got a weird problem here in that certain users internet access
suddenly stops and the only way to rectify it is to give them a new ip
address. The users access to our internal network and its various subnets
is unaffected they just seems to get blocked at the proxy, they can't even
ping its private interface and unloading ipflt makes no difference.

Any ideas on this issue would be greatly appreciated!

Matt (CNE)