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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

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Forward packets Wireguard to local subnet, with Nftables. (programming.dev)

submitted 1 week ago* (last edited 1 week ago) by SpongeB0B@programming.dev to c/linux@lemmy.ml

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Hi,

I would like to forward packets that come from a wireguard connection to a local subnet

environment

Client: connected to server trough wireguard IP 192.168.X.2
server: connected to Client trough wireguard IP 192.168.X.1 and 192.168.Y.1 ( it's not systemd free ¯\(ツ)/¯ )
aMachine: on the same subnet as server IP 192.168.Y.2

on the server I've done

#I don't know if this is necessary ?
echo "net.ipv4.ip_forward=1" >> /etc/sysctl.conf
sysctl --system

I've added the following rule to the nftables config on server but it seem the packet get lost ?

#added inside existing table `table ip Tip {}`
chain chPreRoute {
type nat hook prerouting priority 0; policy accept;
iif wg0 icmp type echo-request dnat to 192.168.Y.2
}

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[–] Euro@lemmy.ml 2 points 1 week ago

I wanted to do the exact same thing and found this extremely helpful blog post.

It works with iptables, and not nftables though, I don't know enough about iptables and networking to translate it to nftables.

(web archive link because the blogger is migrating their blogs, and this one is currently unavailable on their site)