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ICMP Flooding vs SMURF Attack
Hi Aamir,
I just don’t know why are you using so many statements, from my understanding this question could be answered with a few lines, someone let me know if I’m wrong:
ip access-list extended SMURF_UDP_FLOODING deny icmp any any echo deny icmp any eny echo-reply deny udp any eq echo any deny udp any any eq echo permit ip any any
Andy
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From: “Aamir Aziz” Reply-To: “Aamir Aziz” To: ccielab@groupstudy.com Subject: ICMP Flooding vs SMURF Attack Date: Sun, 20 Aug 2006 15:08:31 +0400 >Hi there ppl > >I just wanted to clear something, if the tast says that certain router is >experiencing attack via ICMP and UDP flooding does it mean SMURF ATTACK? >and would the following ACL work to mitigate this flooding issue? > >deny icmp any 0.0.0.255 255.255.255.0 echo >deny icmp any 0.0.0.0 255.255.255.0 echo >deny icmp any 0.0.0.255 255.255.255.0 echo-reply deny icmp any 0.0.0.0 >255.255.255.0 echo-reply >deny upd any 0.0.0.255 255.255.255.0 echo >deny upd any 0.0.0.0 255.255.255.0 echo >permit ip any any > >Thanks >Aamir > >_______________________________________________________________________ >Subscription information may be found at: >http://www.groupstudy.com/list/CCIELab.html
