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. Bootstrap pkg

DragonFlyBSD's daily snapshots and releases (starting with 3.4) come with pkg already installed. Upgrades from earlier releases, however, will not have it. If pkg is missing on the system for any reason, it can be quickly bootstrapped without having to build it from source or even having DPorts installed:

# cd /usr
# make pkg-bootstrap
# rehash
# pkg-static install -y pkg
# rehash
2.1. Recommended steps to setup pkg

Here, it will be similar to what we have on a FreeBSD system, and we are going to use HTTPS to fetch our packages, and updates - so here we also need an extra package to help us out; ca_root_nss.

# pkg install ca_root_nss

For fresh installations, the file /usr/local/etc/pkg/repos/df-latest.conf.sample is copied to /usr/local/etc/pkg/repos/df-latest. The files ending in the ".sample" extension are ignored; pkg(8) only reads files that end in ".conf" and it will read as many as it finds.

DragonflyBSD has 2 packages repositories:

  • Avalon (mirror-master.dragonflybsd.org);
  • Wolfpond (pkg.wolfpond.org).

We can simply edit the URL used to point to the repositories on /usr/local/etc/pkg/repos/df-latest and that's it! Remember to use pkg+https:// for Avalon.

After applying all these changes, we update the packages list again and try to check if there's already a new update to apply:

# pkg update -f
# pkg upgrade -y -f

3. Install Tor

Here we can choose to install the latest stable version (recommended):

# pkg install tor

Or install an alpha release:

# pkg install tor-devel

4. Install obfs4proxy

# pkg install obfs4proxy-tor

5. Edit your Tor config file, usually located at /usr/local/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/local/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

# echo "tor_setuid=YES" >> /etc/rc.conf`
# echo "tor_enable=YES" >> /etc/rc.conf`
# service 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.