On 24.05.2017 19:47, Michael Fox - N6MEF wrote:
If the gateway doesn't use RIP, then it may also not open that port in its firewall. So it may either drop the packets silently or return ICMP unreachables. Right? If so, then the most we can say about this situation is that the site is not accepting RIP, not that something is "probably wrong". Or am I missing something?
Sorry to ask but what has accepting RIP to do with the gateway IP? RIP is encapsulated into IPIP, so no firewall will ever care about that. And no sane firewall setup will accept RIP on its WAN. From both the gateway's point of view it's just protocol 4, nothing else.