Cisco ASA 5510

I have a Cisco ASA 5510 on the perimeter of a network that is getting a lot of garbage traffic pointed at several servers that face the Public Internet.  The requests for several websites are coming from hundreds of different IPs but all contain a specifc text string in them.  Is there a way on this ASA to configure an Access-list to deny traffic containing a specific string?  thanks
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Jeffrey FlohrHelpdesk ManagerCommented:
Access control lists (ACLs) enable you to permit or deny packets based on source and destination IP address,
IP protocol information, or TCP or UDP protocol information. I'm not aware of whether you can set up an ACL for specific string sets.
SIDESHOWBLAHAuthor Commented:
Reading more online and it looks like an Inspection policy-map may be what I am looking for, allows deep packet inspection.  But I do not see a way to look for specific content yet.
Benjamin Van DitmarsSr Network EngineerCommented:
check this site. you need to use some regular expressions to make this type of acl

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