I was wondering if there is a good method for logging all attempts to connect to a port on my computer. Basically, I was looking for something that logged the port and ip and the destination port of attempted connections.
I'm running Mandrake 9.1
Presumably a 2.4.x kernel then.
iptables itself (the kernel's built-in firewalling) will do this; LOG is a predefined target that does not terminate (in the way that ACCEPT, REJECT, and DENY do) but does log each matching packet before passing it on to the next rule in the chain.
The man page for iptables will at least get you started. If you need help with specifics after reading it, don't hesitate to ask here.
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