Re: Took network down with wrong access-list

From: cdmurray@statestreet.com
Date: Thu Nov 14 2002 - 19:51:12 GMT-3


When you say took the connection down I take it you mean "access" wise.
(If the physical link went down then that's another problem that needs to
be researched for bugs
or reported to TAC)

Your access-list consists of only deny statements (your statement and the
implicit deny at the end)
and this is assuming access-list 100 doesn't have other entries not
mentioned in your e-mail.
Include the permit statements after your deny statement (permit ip any any
or be specific
for hosts/networks) - good luck with the client

Regards,
Christine Murray
Ph: 612-93236124
cdmurray@statestreet.com

                                                                                                           
                      Jeongwoo Park
                      <jpark@wams.com> To: "'ccielab@groupstudy.com'"
                      Sent by: <ccielab@groupstudy.com>
                      nobody@groupstudy cc:
                      .com Subject: Took network down with wrong access-list
                                                                                                           
                                                                                                           
                      11/15/2002 09:02
                      AM
                      Please respond to
                      Jeongwoo Park
                                                                                                           
                                                                                                           

Hi all.
I like to share what I did this morning to take an internet connection down
for one of customers' companies.

Internet_router#

Interface s0
Ip access-group 100 in
.
.
.
access-list 100 deny icmp any host 172.16.1.10 echo

I was tring to set up access-list in a way that no one can ping one of
their
servers in their network.
This config took their internet connection down.
I immediately removed it, and it came back normal.

What did I wrong?

Thanks,

JP

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