
'netwatch' runs for weeks on SunOS 5.3 without crashing now...

Much improved logging.

telnet now handles retransmissions better (but not completely), option
negotiation, and monitors the input side of the stream for suspicious
commands.

Report SunRPC lookup requests (via -u switch)

Report tftp traffic (via -u switch)

SMTP monitoring for attempts to mail to/from programs or files, including
such usage in headers like 'Errors-To:'...
