The same way. Both udp and icmp utilize the IP ttl in the same manner. On Wed, 2002-11-13 at 17:20, Mossburg, Geoff (MAN-Corporate) wrote: > Out of curiosity, how would this affect traceroutes using UDP instead of > TCP? > Thanks! > Geoff Mossburg > > -----Original Message----- > From: Peter van Oene [mailto:pvo@;usermail.com] > Sent: Wednesday, November 13, 2002 4:34 PM > To: [EMAIL PROTECTED] > Subject: Re: Hide traceroute [7:57343] > > > On Wed, 2002-11-13 at 05:08, ciscoGo2002 wrote: > > Hello friends, > > > > Suppose that I have a ISP and I would like to hide my > > internal addresses to the external customers. I would > > like to do it without using a firewall and without > > acl's.... Is there any way to do this? Can I disable > > TTL's processing in Cisco routers? > > This is usually done with MPLS based cores. Essentially, the IP TTL is > not modified at egress to relfect the number of MPLS "hops" within the > network which essentially makes the entire MPLS cloud look like one > hop. However, the MPLS TTL is still used with the cloud for loop > mitigation. > > Turning off TTL decrementing would remove the loop mitigation capability > in IP which would result in packets looping endlessly which really isn't > a good thing, and certainly not worth the tradeoff gained by hiding ones > topology ;-) > > Pete > > > > > Thanks! > > > > > > _______________________________________________________________ > > Yahoo! Messenger > > Nueva versisn: Webcam, voz, y mucho mas !Gratis! > > Descargalo ya desde http://messenger.yahoo.es
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