ref: 6b5de9ee6738c0f52122978130d4a8a508d75739
parent: f8ddcb23b9dd969875dd4e961591700c79b7d5f7
author: cinap_lenrek <cinap_lenrek@felloff.net>
date: Fri Dec 30 10:09:07 EST 2022
icmp: only forward EchoRequest, Timestamp(request), InfoRequest and AddrMaskRequest