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wg-ip is a tool to assign ip addresses derived from the public keys to wireguard interfaces.

How to

I personally just run wg-ip apply dev wg0 after adding the peers and bringing the interface up. In my automation scripts, I obtain the private ip address of a given node by using wg-ip gen <node-pubkey>.

Portability

wg-ip is written to be portable across shells. It should run fine on openwrt (if not, it's a bug).

Advanced usage

Usage: wg-ip [-4|-6|--subnet <subnet>][--asnet <length>] [gen <pubkey>|[dev <device> ]apply|[dev <device> ]dryrun]
Subnet used:
    -4
        sets the subnet to 10.0.0.0/8
    -6
        sets the subnet to fd1a:6126:2887::/48
    --subnet <subnet>
        sets an arbitrary (ipv4 or ipv6) subnet
When the subnet is specified several times, only the last
occurrence applies. By default -6 is enabled.
Device used:
    dev <device>:
        specify the device to which the commands apply.
    When the device option is used several times, only the last
    occurrence applies. If no device is specified, commands are
    applied to the first entry returned by 'wg show interfaces'
Commands:
    --help
        show this message
    --test
        run the embedded test suite
    gen <pubkey>:
        generate an ip from the pubkey, in the specified subnet.
        when the --asnet option is used, the generated ip is cut to
        length to generate a subnet prefix instead of a whole ip.
    dryrun:
        generate an ip from the pubkey of the specified interface (see
        "device used"), as well as for all the peers of that same
        interface, in the specified subnet (see "subnet used"). Create
        commands to add this ip to the interface, as well as commands
        to modify allowed_ips for each peer. The commands are simply
        displayed, not applied.
    apply:
        actually run the commands displayed by 'dryrun'
When several commands are specified, only the last one is
executed. Executing '' without argument is the same as running
' dryrun'
Example:
     dev wg0 apply

Original post

See https://lists.zx2c4.com/pipermail/wireguard/2018-April/002593.html

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automatic ip addresses for wireguard peers

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