> From: Ruairi Roddy [mailto:ruairi.roddy at examiner.ie]
>> If it could packet sniff, send alerts and log when port scans/ping
> probes/other evil ha><or stuff was going on, all the better.
> Anybody got any ideas?
As far as I recall, you can use the ipchains package to log
suspicious-looking packets. It can also make any ports "black holes" by
simply swallowing packets (this mode is either deny or reject, I cant
remember which; the other one sends an ICMP "undeliverable" message).
You could then log to another host using syslog, so if the box *was*
compromised, the logs would be safe (assuming the loghost wasn't
compromised).
VNC is probably over-kill bandwidth-ise. You could get all necessary
infrormation by logging in with SSH or OpenSSH and using command-line tools.
If you needed to use a graphical tool, X would serve well as the display
transport, especially since you can forward encrypted X using SSH.
Paul.
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