[TriLUG] traceroute works, ping and tcp services don't get through

[Alexey Toptygin]

On Fri, 18 May 2012, Joseph Mack NA3T wrote:

> On Fri, 18 May 2012, Michael Hrivnak wrote:
>
>> It may be helpful to better understand what traceroute is doing when client 
>> runs traceroute to server.
>
> yes ;-)
>
>> Packets from client to server are UDP and sent to ports that are unlikely 
>> to have an actual service listening on the destination.
>
> hmm. I thought they were type ICMP, which is a type of UDP I guess.

ICMP is not a type of UDP. It's its own protocol.

 			Alexey