util for testing forwarded ports through wireguard vpn
this script creates a temporary linuxserver/wireguard container, installs socat, and then listens on a specified port. you can then connect remotely to test if your vpn is actually forwarding the port.
i use this to test bittorrent connectability – you get way more peers if your bt client can listen. note that your vpn provider needs to actually support port forwarding, and you have to set that up first for your specific port. i suggest choosing a random port between 10000 and 65353. you want this port to be unique to you for your vpn endpoint.
git clone https://github.com/ftc2/wireguard-port-test.gitwg_listen.sh CONF PORT [FILTER]
listen inside of wireguard to test if a forwarded port is working
args:
CONF: path to wireguard config file (prepend with './' for relative path)
PORT: listening port
FILTER: optional IP range to filter (e.g. 'your_real_ip/32')
useful if you're getting a lot of spammy traffic on the port,
and you can't see your test connection
i've seen problems with using the same wireguard conf multiple times simultaneously, so i suggest shutting down wireguard elsewhere during testing
pretend your real ip is 142.250.190.110
$ ./wg_listen.sh ./torguard.sanfrancisco.conf 12345 142.250.190.110/32
...
**************************************************
LISTENING ON VPN: 167.99.163.123:12345/tcp
**************************************************
try connecting remotely with a command like:
nc -v 167.99.163.123 12345
or better yet (socat is a superior tool!):
socat TCP:167.99.163.123:12345 -
and then on either end, you can type stuff in and
hit enter. you should see it echoed on both ends
like a chat.
**************************************************
+ eval socat TCP-LISTEN:12345,reuseaddr,keepalive,fork,range=142.250.190.110/32 -
++ socat TCP-LISTEN:12345,reuseaddr,keepalive,fork,range=142.250.190.110/32 -
hey
hows it going
then, in another term:
$ socat TCP:167.99.163.123:12345 -
hey
hows it going
kill the container if it hangs:
docker kill wireguard-port-test