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| Subject: | Re: Trace route query |
|---|---|
| Date: | Tue, 20 Sep 2005 09:50:01 +0200 |
Le vendredi 16 septembre 2005 à 19:36 +0000, tyler_hans@yahoo.com a écrit :
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.
Yes it is possible. The reason is that thoses addresses are the routers ones. Suppose you are an ISP and you use RFC1918 addressing for your internal links. If you don't filter, someone tracerouting your network will see RFC1918 addresses because your routers use them. On the other hand, it does not mean that theses addresses are routed outside the organisation. They're juste used as source for paquets you receive, and routing most of the time only depends on destination. So there's no big deal in receiving an ICMP frag needed destined to your public address, but sourced from a RFC1918 one. -- http://sid.rstack.org/ PGP KeyID: 157E98EE FingerPrint: FA62226DA9E72FA8AECAA240008B480E157E98EE
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