flow esp out from 127.0.0.1 to 127.0.0.1 peer 127.0.0.1 type require
flow esp in from 127.0.0.1 to 127.0.0.1 peer 127.0.0.1 type require
flow esp out from ::1 to ::1 peer ::1 type require
flow esp in from ::1 to ::1 peer ::1 type require