Risk of IP Spoofing mitigation

Where to configure ACL to deny all traffic from the external network that has a source address that must reside on the network internal? Does include public IPs assigned?

Where to filter all outbound traffic that does not address the source of IP addresses for the network?

Network: Router ISP <> perimeter router<>firewall more DMZ<>LAN switch.

You can filter your penetration of the perimter router interface.

Refer to this link

http://www.Cisco.com/en/us/Tech/tk648/tk361/technologies_white_paper09186a00801afc76.shtml

[edit]

using the acl to the perimeter of your router using link example above u should have additional protection before atacker strikes again the firewall.

Firewall a unti-spoofing feature, u must always refer to this other link.

http://www.Cisco.com/en/us/products/ps6120/products_tech_note09186a00809763ea.shtml#spoof

Concerning

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Tags: Cisco Security

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