Based on the information you give it crashes 2 or 3 times a day. If it
would be related to high data load would it not crash sooner ?
The Mensys FTP server runs for weeks and also gets high amounts of data
to process. The same for the Mensys file server that works with Netbios
over TCP/IP.
Judging by the fact that your machines does not crash that quickly I
would suggest you the following:
Look at netstat -s, does the amount of sockets continue to rise ?
Look at the figures of netstat -m for MBUFS
Netstat -n
Most likely your system traps because the IP stack is running out of
resources. I will be in contact via private email today.