I have a server Nat’d from a public IP to a private IP. Now I can on occasion ping this server from the ‘outside’ on it’s public IP. In fact it has been pinged for quite some time without failing. All of a sudden it will fail to respond. This can go on for hours or seconds. I can see the pings reaching the MT interface in Winbox but no replies from the server are returned. (while it’s failing).
While this is failing I can ping the host from the internal side (private IP) and from the public side via a directly connected box on the same public IP space (usually).
This issue happens will all hosts nat’d as above.
I also notice that in my main routing table that I have a ‘DC’ connection for this host, it has the correct gateway listed and shows itself as the preferred host. i.e., Destination: X.X.123.0/32, Gateway: 0.0.0.0, preferred source X.X.123.166, Distance: 0, Interface X.X.123.X (this is the numeric address of the inferface name just for clarifcation for those reading this as my interface name would not make sense without the accompaning IP).
I am using MT 2.8.11
Anyone have any ideas?