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A sizeable chunk of Firezone's Rust components deal with parsing, manipulating and emitting DNS queries and responses. The API surface of DNS is quite large and to make handling of all corner-cases easier, we depend on the `domain` library to do the heavy-lifting for us. For better or worse, `domain` follows a lazy-parsing approach. Thus, creating a new DNS message doesn't actually verify that it is in fact valid. Within Firezone, we make several assumptions around DNS messages, such as that they will only ever contain a single question. Historically, DNS allows for multiple questions per query but in practise, nobody uses that. Due to how we handle DNS in Firezone, manipulating these messages happens in multiple places. That combined with the lazy-parsing approach from `domain` warrants having our own `dns-types` library that wraps `domain` and provides us with types that offer the interface we need in the rest of the codebase. Resolves: #7019
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:
- Generate a new Gateway token from the "Gateways" section of the admin portal and save it in your secrets manager.
- Ensure the
FIREZONE_TOKEN=<gateway_token>environment variable is set securely in your Gateway's shell environment. The Gateway requires this variable at startup. - Set
FIREZONE_IDto a unique string to identify this gateway in the portal, e.g.export FIREZONE_ID=$(uuidgen). The Gateway requires this variable at startup. - 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.