Files
firezone/rust/gateway
Thomas Eizinger de7d3bff89 fix(connlib): re-resolve portal host on WS hiccup (#10817)
Currently, the DNS records for the portal's hostname are only resolved
during startup. When the WebSocket connection fails, we try to reconnect
but only with the IPs that we have previously resolved. If the local IP
stack changed since then or the hostname now points to different IPs, we
will run into the reconnect-timeout configured in `phoenix-channel`.

To fix this, we re-resolve the portal's hostname every time the
WebSocket connection fails. For the Gateway, this is easy as we can
simply reuse the already existing `TokioResolver` provided by hickory.
For the Client, we need to write our own DNS client on top of our socket
factory abstraction to ensure we don't create a routing loop with the
resulting DNS queries. To simplify things, we only send DNS queries over
UDP. Those are not guaranteed to succeed but given that we do this on
every "hiccup", we already have a retry mechanism. We use the currently
configured upstream DNS servers for this.

Resolves: #10238
2025-11-11 03:24:36 +00:00
..

gateway

This crate houses the Firezone gateway.

Building

You can build the gateway using: cargo build --release --bin firezone-gateway

You should then find a binary in target/release/firezone-gateway.

Running

The Firezone Gateway supports Linux only. To run the Gateway binary on your Linux host:

  1. Generate a new Gateway token from the "Gateways" section of the admin portal and save it in your secrets manager.
  2. Provide the token to the Gateway using one of these methods:
    • Set the FIREZONE_TOKEN=<gateway_token> environment variable
    • Set a systemd credential named FIREZONE_TOKEN.
  3. Set FIREZONE_ID to a unique string to identify this gateway in the portal, e.g. export FIREZONE_ID=$(head -c 32 /dev/urandom | sha256sum | cut -d' ' -f1). The Gateway requires this variable at startup. We recommend this to be a 64 character hex string.
  4. Now, you can start the Gateway with:
firezone-gateway

If you're running as a non-root user, you'll need the CAP_NET_ADMIN capability to open /dev/net/tun. You can add this to the gateway binary with:

sudo setcap 'cap_net_admin+eip' /path/to/firezone-gateway

Ports

The gateway requires no open ports. Connections automatically traverse NAT with STUN/TURN via the relay.