One of my customers have had a 5.1 server with BM36 running for a
couple of
years without problem. A mounth ago, the server was upgraded to NW6
with
SP3. From that point, this server has kept us busy...

Symptoms:
After clearing the cache and restart of server, it works with expected
speed
for a day or two. But after a while, the download of web pages freezes
and
won't download all objects. Pressing F5 to refresh, helps most of thetimes...

At first, I was convinced that it had something to do with proxy
config. But
then I tried disable filtering, which made the server behave normal
again.

The server is configured with dynamic NAT on public NIC, 4 traditional

volumes of 8GB each (128 dirs) and the latest proxy.cfg from Craig's
site.
tcp delayed ack = off.

There's a PC on the LAN that's running Citrix client to a host outside
the
BM server, and the session keeps disconnecting all the time. But if I
unload
and reload FILTSRV.NLM, the Citrix session is stable again for a day
or two
again.

Since the beginning of this problem, we've tried everything...

BM is upgraded to 3.7 with b4sp3, filters have been migrated.

Any ideas?