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40 lines
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Bash

#!/bin/bash -e
default_routev4=$(ip route list | grep -F 'default')
interface=$(echo "$default_routev4" | perl -pe 's#^.* dev (\w+) .*$#$1#')
macaddress=$(ip address show dev "$interface" | grep -F 'link/ether' | perl -pe 's#^.*link/ether ([a-z0-9:]*) brd .+$#$1#')
addresses=$(ip address show dev "$interface" scope global)
gatewayv4=$(echo "$default_routev4" | perl -pe 's#^.* via ([\d.]+) .*$#$1#')
addressv4=$(echo "$addresses" | grep -F 'inet ' | perl -pe 's#^.* inet ([\d.]+).*#$1#')
addressv6=$(echo "$addresses" | grep -F 'inet6 ' | perl -pe 's#^.* inet6 ([a-z0-9:]+)::[a-z0-9]+.*$#$1#')
echo "[Match]
MACAddress=$macaddress
[Network]
Gateway=$gatewayv4
Gateway=fe80::1
Address=116.202.199.132/32
Address=116.202.199.133/32
Address=116.202.199.134/32
Address=116.202.199.143/32
Address=176.9.141.113/32
Address=176.9.141.119/32
Address=176.9.141.124/32
Address=176.9.141.125/32
Address=5.9.203.242/32
Address=5.9.203.246/32
Address=5.9.203.247/32
[Address]
Address=${addressv4}/32
Peer=${gatewayv4}/32
[Address]
Address=${addressv6}::1337/64" > "/etc/systemd/network/internet.network"