Took network down with wrong access-list

From: Jeongwoo Park (jpark@wams.com)
Date: Thu Nov 14 2002 - 19:02:57 GMT-3

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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