Re: Cisco Traceroute and UDP src port range.

Hi,

On Fri, May 1, 2009 at 9:46 PM, Sergey Khalavchuk
<ratio+groupstudy_at_invalid.org.ua> wrote:
> two or three days ago i was asked to filter outgoing traceroute packets.
> matching on source UDP port is like a solution (if you know what ports
> are used) :)

What about traceroute (tracert.exe) from a Windows box? :-)

It uses ICMP (type 8, echo) -- three packets per probe (to get
min/max/avg) with incrementing TTL values, instead of UDP.

I suppose just about any IP-based protocol could be used to trace a
path, since TTL is a field in the IP header.

cheers,
Dale

Blogs and organic groups at http://www.ccie.net
Received on Fri May 01 2009 - 22:23:52 ART