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iptables and tor
Has anyone given any thought as to what firewall rules to use on a linux
system running a tor server? Besides the usual attacks against the
system itself, I'm particularly concerned with possible attacks against
the tor network itslef which could be circumvented by proper firewall
rules --- something like using the TCP options to "mark" tor packets so
they can be tracked or similar hacks. I haven't investigated deeply, so
my concerns may be misplaced --- perhaps the packets are sufficiently
scrubbed when they are relayed by the routers's ssl connections and no
further scrubbing by iptables is needed to enhance anonymity.
Can anyone comment?
Anthony G. Basile, Ph.D.
Director of Information Technology,
320 Porter Ave.
Buffalo NY, 14201