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Certain packets cannot be translated as part of NAT64/46. The RFC says to "Silently drop" those. Currently, we log all errors that happens during the translation and don't follow this guideline. Most of these "silently drop" errors are related to ICMP types that cannot be represented in the other version such as ICMPv6 Neighbor Solicitation. To fix this, we introduce a new error type in the `ip_packet` module: `ImpossibleTranslation`. For convenience reasons, we carry that one through all layers as an `anyhow::Error` and test at the very top of the event-loop, whether the root-cause of the error is such a failed translation. If so, we ignore the error and move on. This isn't as type-safe as it could be but it is much easier to implement. Additionally, the risk of a bug here (i.e. if we stop emitting this error within the IP packet translation layer) is merely that the log will pop up again. Resolves: #7516.
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.