[aklug] Re: ping

In Linux you can use 'traceroute -I' to use ICMP instead of UDP.

-----Original Message-----
From: aklug-bounce@aklug.org [mailto:aklug-bounce@aklug.org] On Behalf Of
Shane R. Spencer
Sent: Tuesday, April 13, 2010 8:48 AM
To: Arthur Corliss
Cc: Scott A. Johnson; aklug@aklug.org
Subject: [aklug] Re: ping

Arthur Corliss wrote:
> On Mon, 12 Apr 2010, Scott A. Johnson wrote:
>
>> Not talking about ping. There is a difference between ICMP listening
>> for echo reply (ping) and measuring the TTL decreasing to figure out
>> which hosts your data is being routed through (traceroute). Has to do
>> with the different control pit set in the packet that determines which
>> kind of ICMP diagnostic you're sending/listening for.
>
> FYI: UNIX traceroute doesn't use ICMP for traceroutes, it uses UDP.
> Windows uses ICMP. Don't know what you're doing your traceroute from, but
> it might be a factor.
>

I thought it was the other way around but tcpdump says otherwise.
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Received on Tue Apr 13 09:03:54 2010