[90348] in North American Network Operators' Group
private ip addresses from ISP
daemon@ATHENA.MIT.EDU (adrian kok)
Wed May 17 09:48:43 2006
Date: Wed, 17 May 2006 21:48:11 +0800 (CST)
From: adrian kok <adriankok2000@yahoo.com.hk>
To: nanog@nanog.org
Errors-To: owner-nanog@merit.edu
Hi all
Have you had this experience?
Our router is running BGP and connecting to our
upstream provider with /30 network. Our log reveals
that there are private IP addresses reaching our
router's interface that is facing our upstream ISP.
How could this be possible? Should upstream ISP be
blocking private IP address according to standard
configuration? Could the packet be stripped and IP be
converted somehow during the transition? It happens in
many Tier-1 ISP though !
Thank you for your information
