Security Basics mailing list archives
Re: getting routes from internet facing routers
From: martin <martiniscool () gmail com>
Date: Tue, 21 Jul 2009 08:17:38 +0100
Thanks for the reply Chris. Having re-read my original e-mail I see I woreded it really badly :-( The part from my original mail I'm actually interested in is this line:
I've also heard that it's possible to get routes from a router/firewall facing the public domain without having to login to it
In other words, that potential hackers can start to build a diagram of my network by sending crafted packets to my internet facing router and seeing what private IP routes (ie 10.0.0.0, 192.168 etc etc) routes lie inside. I've googled this and found nothing. Do you (or anybody else) have any ideas how to get these routes out when you don't have access to the router ? Is it by using ICMP ? Also, is it possible to "extract" routes from an internet facing router regardless of what routing protocol it's running, or even if it's running just static routing ? Hope I've explained myself better this time ? M 2009/7/21 Chris <cweindel () gmail com>:
If you're routing with BGP, you can filter it by blocking port 179. all ICMP does it block those types of packets - it won't help you block advertised routes. of course, the ultimate externally facing router is in front of a firewall / in a DMZ... C
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- getting routes from internet facing routers martin (Jul 20)
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- Re: getting routes from internet facing routers Shreyas Zare (Jul 21)
- Re: getting routes from internet facing routers martin (Jul 22)
- Re: getting routes from internet facing routers Jeffrey Walton (Jul 22)
- Re: getting routes from internet facing routers Shreyas Zare (Jul 22)
- Re: getting routes from internet facing routers martin (Jul 21)
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- getting routes from internet facing routers martin (Jul 27)
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