The client is windows 2000 sp3. vanilla smbd 3.0.22 running on CentOS 4.2
After working for a while the server (smbd) closes the tcp connection and printing to the logs "BAD SIG" errors.
I'll attach shortly a level 10 log file and tcpdump output file.
The log file is here:
The tcpdump file is here:
(can't attach - too big).