wg-handshake-watcher.sh

#!/usr/bin/env sh

wg_filter="wg0 wg1" # EDITME

current_time=$(date +%s)
wg show all dump | awk '{if ($5 != "off") print $1,$6}' | while read -r each_dump; do
    interface=$(echo $each_dump | cut -d' ' -f1)
    last_handshake=$(echo $each_dump | cut -d' ' -f2)
    if echo $wg_filter | grep -q $interface; then
        if [ $((current_time - last_handshake)) -gt 240 ]; then
            wg set $interface listen-port 0
        fi
    fi
done < <(wg show all dump | awk '{if ($5 != "off") print $1,$6}')