Chapter 8 Configuring a Simple Firewall

Configuration Example

ip nat outside no cdp enable

!

!acl 103 defines traffic allowed from the peer for the IPsec tunnel. access-list 103 permit udp host 200.1.1.1 any eq isakmp access-list 103 permit udp host 200.1.1.1 eq isakmp any access-list 103 permit esp host 200.1.1.1 any

!Allow ICMP for debugging but should be disabled because of security implications. access-list 103 permit icmp any any

access-list 103 deny ip any any ! Prevents Internet-initiated traffic inbound.

!acl 105 matches addresses for the ipsec tunnel to or from the corporate network. access-list 105 permit ip 10.1.1.0 0.0.0.255 192.168.0.0 0.0.255.255

no cdp run

Cisco Secure Router 520 Series Software Configuration Guide

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Cisco Systems 520 series manual Ip nat outside no cdp enable