198.18.0.0 is in the 192.18.0.0/15 block which has been allocated for use in benchmark tests
of network interconnect devices. This range was assigned to minimize the chance of conflict
in a case a testing device were to be accidentally connected to part of the Internet. Packets
with source addresses from this range are not meant to be forwarded across the Internet.
[ RFC2544 ,
RFC2544 ]