What are the security implications of running a Tor relay on a machine behind a firewall?
This is a MS-focused list. Tor is designed by Unix developers, and works best (read: most securely) on Debian. Not Windows.
You should view the archives of or-talk, and try asking there if you can't find the answer in archives. The or-talk list has multiple threads on known attacks to Tor. There is also a tor-relays mailing list at torproject.org, for admins of relays.
Is there a high probability of it being hacked somehow, and what does one do to prevent that?
Nothing special, general OS hardening. But again, Tor is more secure on Unix than Windows. Also, pick a good ISP, and have a lawyer on file. :-(
http://www.torproject.org/docs/tor-doc-relay.html.en https://trac.torproject.org/projects/tor/wiki/TheOnionRouter/OperationalSecurity https://blog.torproject.org/blog/tips-running-exit-node-minimal-harassment https://trac.torproject.org/projects/tor/wiki/TheOnionRouter/TorAbuseTemplates http://www.torproject.org/eff/tor-legal-faq.html.en
Thank you in advance for your time and advice.
HTH.
