1. Enable Automatic Software Updates
One of the most important things to keep your relay secure is to install security updates timely and ideally automatically so you can not forget about it.
Follow the instructions to enable automatic software updates for your operating system.
2. Setup pkg_add
Modern versions of the NetBSD operating system can be set to use pkgin, which is a piece of software aimed to be like apt or yum for managing pkgsrc binary packages. We are not convering its setup here, and opt to use plain pkg_add instead.
# echo "PKG_PATH=http://cdn.netbsd.org/pub/pkgsrc/packages/NetBSD/$(uname -m)/$(uname -r)/All" > /etc/pkg_install.conf
3. Install Tor
# pkg_add tor
4. Install obfs4proxy
# pkg_add install obfs4proxy
5. Edit your Tor config file, usually located at /usr/pkg/etc/tor/torrc and replace its content with:
BridgeRelay 1
# Replace "TODO1" with a Tor port of your choice.
# This port must be externally reachable.
# Avoid port 9001 because it's commonly associated with Tor and censors may be scanning the Internet for this port.
ORPort TODO1
ServerTransportPlugin obfs4 exec /usr/pkg/bin/obfs4proxy
# Replace "TODO2" with an obfs4 port of your choice.
# This port must be externally reachable and must be different from the one specified for ORPort.
# Avoid port 9001 because it's commonly associated with Tor and censors may be scanning the Internet for this port.
ServerTransportListenAddr obfs4 0.0.0.0:TODO2
# Local communication port between Tor and obfs4. Always set this to "auto".
# "Ext" means "extended", not "external". Don't try to set a specific port number, nor listen on 0.0.0.0.
ExtORPort auto
# Replace "<address@email.com>" with your email address so we can contact you if there are problems with your bridge.
# This is optional but encouraged.
ContactInfo <address@email.com>
# Pick a nickname that you like for your bridge. This is optional.
Nickname PickANickname
Don't forget to change the ORPort, ServerTransportListenAddr, ContactInfo, and Nickname options.
- Note that both Tor's OR port and its obfs4 port must be reachable. If your bridge is behind a firewall or NAT, make sure to open both ports. You can use our reachability test to see if your obfs4 port is reachable from the Internet.
6. Start Tor
# ln -sf /usr/pkg/share/examples/rc.d/tor /etc/rc.d/tor
# echo "tor=YES" >> /etc/rc.conf
# /etc/rc.d/tor start
7. Monitor your logs
To confirm your bridge is running with no issues, you should see something like this (usually in /var/log/tor/log or /var/log/syslog):
[notice] Your Tor server's identity key fingerprint is '<NICKNAME> <FINGERPRINT>'
[notice] Your Tor bridge's hashed identity key fingerprint is '<NICKNAME> <HASHED FINGERPRINT>'
[notice] Registered server transport 'obfs4' at '[::]:46396'
[notice] Tor has successfully opened a circuit. Looks like client functionality is working.
[notice] Bootstrapped 100%: Done
[notice] Now checking whether ORPort <redacted>:3818 is reachable... (this may take up to 20 minutes -- look for log messages indicating success)
[notice] Self-testing indicates your ORPort is reachable from the outside. Excellent. Publishing server descriptor.
8. Final Notes
If you are having trouble setting up your bridge, have a look at our help section.
If your bridge is now running, check out the post-install notes.