![]() ![]() This means that for any traffic routed to the interface within an IP address in the range of 192.168.200.0 to 192.168.200.255, WireGuard will encrypt and reroute the traffic over a “real” network interface to the “real” remote address of 203.0.113.2 (at UDP port 51822). ![]() In the original example above, the peer specified for the interface has an AllowedIPs setting of 192.168.200.0/24, and an Endpoint setting of 203.0.113.2:51822. The Endpoint setting for each peer tells WireGuard the “real” IP address and port to which it should ultimately send traffic. When traffic is routed to a virtual WireGuard interface, WireGuard needs to know where to send that traffic on a “real” network. PublicKey = fE/wdxzl0klVp/IR8UcaoGUMjqaWi3jAd7KzHKFS6Ds=ĪllowedIPs = 192.168.200.0/24, 10.0.0.0/24Īs you can see, IP addresses specified by the AllowedIPs setting can be a mix of “real” addresses (like a “real” remote subnet) and virtual addresses (like the other addresses in your WireGuard VPN). Note that you can specify multiple IP addresses (or blocks of addresses) either by separating them with commas in an individual AllowedIPs setting, or you can just specify the AllowedIPs setting multiple times for the same peer: (Or more likely, apply different blocks of the subnet to the AllowedIPs setting of different peers, if the interface has multiple peers.) If we also wanted this interface to be able to route to the 10.0.0.0/24 subnet, regardless of what we set for the interface’s Address setting, we’d have to explicitly add that subnet to the AllowedIPs setting for one of the interface’s peers. In the above example, however, we want to route just a particular subnet to the WireGuard interface - a particular internal site we want to be able to access through a WireGuard tunnel to a peer that’s located in the site - so so we set AllowedIPs for the peer to 192.168.200.0/24 (the block of addresses from 192.168.200.0 to 192.168.200.255). If you wanted to route all a host’s traffic through a WireGuard interface, you’d configure the interface with one peer, and set that peer’s AllowedIPs to be 0.0.0.0/0, ::/0. If you use the wg-quick program (or the WireGuard app on platforms like iOS, Android, etc) to set up a WireGuard interface, this program will also configure the host’s routing table with routes that match the AllowedIPs setting, so that traffic which can be routed to the WireGuard interface will be routed to it. WireGuard will drop any traffic routed to the interface that has a destination address outside of the AllowedIPs configured for the interface’s peers, and will also drop any traffic coming into the host through the interface that has a source address outside of those same AllowedIPs. ![]() But WireGuard doesn’t use this network prefix to govern what is actually routed through the interface - WireGuard instead relies on the AllowedIPs setting, configured separately for each peer to which the interface can connect. ![]()
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