RE: IEWB - RS -Lab 2 Task 9.4 - ICMP filtering

From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Tue Nov 14 2006 - 20:43:12 ART


It would if the traffic leaving was ICMP but since traceroute is sending
out UDP packets the router doesn't evaluate it as ICMP.

HTH,
 
Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
bdennis@internetworkexpert.com
 
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
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-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Adhu Ajit
Sent: Tuesday, November 14, 2006 2:01 PM
To: ccielab@groupstudy.com
Subject: IEWB - RS -Lab 2 Task 9.4 - ICMP filtering

The solution for this question was a bit different from what I thought
would be the solution.
   
  I dont quite understand why the two lines:
   
  permit icmp any any time-exceeded
  permit icmp any any port-unreachable
   
  have been inserted before the line:
   
  evaluate ICMP
   
  Should'nt "evaluate ICMP" statement take care of all ICMP responses
coming back due to traffic orignated form the inside network ?
   
  Anyone care to comment ?
   
  Thanks in advance.
   

 
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