Piyush,
the answer to your question is YES. you better implement this fix before 
your router gets attacked. the access list implementation consists in 
blocking protocols 53(swipe), 55 (IP Mobility), 77 (Sun ND), and 103 (PIM) 
from cloging up you interface queues. the advisory was pretty straight 
forward.


>From: "Mr piyush shah" 
>Reply-To: "Mr piyush shah" 
>To: [EMAIL PROTECTED]
>Subject: Cisco Security Advisory: Cisco IOS Interface Blocked by IPv4 
>[7:73470]
>Date: Mon, 4 Aug 2003 11:50:57 GMT
>
>Dear all
>Recently there was an article on Cisco Security
>Advisory which stated that all Cisco routers/switches
>having IOS as their operating system,their Interfaces
>will be blocked by IPv4 Packets.In this regard,i have
>a querry.
>Is it that all the router having IOS will be blocked
>or certain specific IOS ?
>Also they have given fixes at the bottom of that
>article which states about access-list,do one need to
>go ahead with implementation of these Acess-lists?
>Kindly help.
>Thanks in advance.
>
>  Piyush
>
>
>
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