Security Basics mailing list archives
All fragmented packet is harmful?
From: MontyRee <chulmin2 () hotmail com>
Date: Mon, 9 Aug 2010 14:34:01 +0000
Hello, all. I read some documents that there are some cases that filter any fragmented packet at the border router using access-list like below. http://www.cisconation.info/en/US/tech/tk648/tk361/technologies_tech_note09186a0080120f48.shtml ! ip access-list extended ACL-INFRASTRUCTURE-IN ! !--- Deny IP fragments using protocol-specific ACEs to aid in !--- classification of attack traffic ! deny tcp any any fragments deny udp any any fragments deny icmp any any fragments deny ip any any fragments ! !--- Deny all other IP traffic to any network device ! deny ip any <infrastructure-address-space> <mask> ! !--- Permit transit traffic ! permit ip any any So I'm not sure that it will be no problem to filter all fragmented packet or not when my systems are web service. Thanks in advance. ------------------------------------------------------------------------ Securing Apache Web Server with thawte Digital Certificate In this guide we examine the importance of Apache-SSL and who needs an SSL certificate. We look at how SSL works, how it benefits your company and how your customers can tell if a site is secure. You will find out how to test, purchase, install and use a thawte Digital Certificate on your Apache web server. Throughout, best practices for set-up are highlighted to help you ensure efficient ongoing management of your encryption keys and digital certificates. http://www.dinclinx.com/Redirect.aspx?36;4175;25;1371;0;5;946;e13b6be442f727d1 ------------------------------------------------------------------------
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- All fragmented packet is harmful? MontyRee (Aug 09)