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 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=57400&t=57343 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
