# <public-local-host/addr>,<public-local-port>
# <public-remote-host/addr>,<public-remote-port>
# <private-local-addr>,<private-remote-addr>,<mtu>,<proto>
# <public-local-host/addr>,<public-local-port>
# <public-remote-host/addr>,<public-remote-port>
# <private-local-addr>,<private-remote-addr>,<mtu>,<proto>