I setup a limited Tor exit node in my home yesterday by following @grahamking‘s guide for Ubuntu. Presently I’m using Ubuntu 11.10 x64 on a spare laptop. The laptop is HP/Compaq 6510b; not very powerful, but I wanted a low-power solution since it is running 24/7 in my home.
The basic steps
First I configured my A record for torexit.yawnbox.com. Then my static IP/hostname for the laptop (step 7 from this guide).
If I open my torrc file, these are the settings I uncommented or added:
SocksPort 0 # what port to open for local application connections
Log notice file /var/log/tor/notices.log
RelayBandwidthRate 2500 KB # Throttle traffic to 2500KB/s
RelayBandwidthBurst 5000 KB # But allow bursts up to 5000KB/s
ContactInfo Christopher Sheats
DirPort 9030 # what port to advertise for directory connections
ExitPolicy accept *:119 # accept nntp as well as default exit policy
ExitPolicy accept *:22 # ssh
ExitPolicy accept *:465 # smtps (SMTP over SSL)
ExitPolicy accept *:993 # imaps (IMAP over SSL)
ExitPolicy accept *:994 # ircs (IRC over SSL)
ExitPolicy accept *:995 # pop3s (POP3 over SSL)
ExitPolicy reject *:* # no exits allowed
I am only allowing ports that are intended for encrypted traffic. I am not yet allowing the standard IRC ports. Also, since this Tor exit node is in my home, I’m not comfortable with running a completely open node. After I figured out what ports I would be allowing, I configured the iptables firewall accordingly using UFW.
I set the bandwidth at 2,500KB/s with 5,000KB/s burst. By browsing the Ubuntu Sofware Center I managed to find two easy to use bandwidth monitors. One for watching locally and one for watching remotely. In just over 24 hours, I have already sent/received 27 GB of traffic!
Why am I running a Tor exit node from my home?
- I strongly support the notion of our right to read, no matter who is trying to stop us.
- I am paying for a fast Internet service that I don’t fully utilize 24/7
- I want to contribute to the Tor Project, especially after watching Roger Dingledine and Jacob Appelbaum (two “core people“) talk at 28C3 (YouTube video below)