What means "icmplog: destination unreable" ?

[Bernd Harmsen <Bernd.Harmsen@OnlineHome.de>]

Hello,

One of our Debian server is running the "Open Rock Telemetry Box" with
NetSaint and Jail. Jail is reporting the following lines to the syslog,
which I do not understand.

------------------------------------------------
18:02:05 inpu icmplog: destination unreachable from 195.179.172.30 
18:38:03 inpu icmplog: destination unreachable from 195.179.172.30 
18:02:05 inpu icmplog: destination unreachable from 195.179.172.30 
18:38:03 inpu icmplog: destination unreachable from 195.179.172.30
------------------------------------------------

As I understand 195.179.172.30 cannot reach some unknown destination.
But we don't know 192.179.172.30 and we don't know the destination.

Can somebody explain this to me, please.


Thank you 
Bernd