wiresteward.service

[Unit]
Description=wiresteward agent
After=network-online.target
Requires=network-online.target
[Service]
Restart=on-failure
ExecStartPre=/bin/sh -c 'iptables-save | grep -q -- "-A POSTROUTING -p tcp -m tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu" \
  || iptables -w 60 -t mangle -A POSTROUTING -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu'
ExecStart=/usr/local/bin/wiresteward -agent
[Install]
WantedBy=multi-user.target