RE: Trace route query

  Yes, this is not only possible, but even common.

  Unless anti-spoofing rules have been instituted, nothing
cares about the source address of an IP packet.  So traceroute
responses from devices with private addresses may get delivered
to the station sending out the traceroute requests.

  Private addresses will generally be seen in traceroute results
if the packet path crosses a provider who has chosen to use 
private addressing on their internal gateways.

David Gillett


> -----Original Message-----
> From: tyler_hans@yahoo.com [mailto:tyler_hans@yahoo.com] 
> Sent: Friday, September 16, 2005 12:36 PM
> To: firewalls@securityfocus.com
> Subject: Trace route query
>
> Hi, 
>
> I need help with one question which has been troubling me for 
> weeks, I have done some research but did not find anything 
> satisfactory. Request all to see if they can help me in this
>
> Is it possible to have a traceroute which shows internal IP 
> addresses as one of the Hop? If yes, what is the reason for 
> this. Since Internl IP addresses are constricted to an 
> specific organization, does this mean that the traffic is 
> router through the organization.
>
> Something like this (only the IP addresses are present)
>
> 202.23.12.13
> 202.23.12.146
> 203.121.3.32
> ...........
> 192.168.0.10
> 192.168.0.123
> 203.12.93.211
> ..............
> ..............