Download CCNP Security Firewall 642-617 Quick Ref. by A. Mason PDF

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Extra resources for CCNP Security Firewall 642-617 Quick Ref.

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On the ASA, NAT is required when traffic is flowing from a lower-security interface to a higher-security interface. For example, the outside interface has a security level of 0, and the inside interface has a security level of 100. Therefore, NAT is required for hosts on the outside to communicate with hosts on the inside. NAT is not required by default for traffic flowing from a higher-security interface to a lower-security interface. 0. You can enable this setting by issuing the nat-control command, which then forces the use of NAT on all interfaces in all directions.

Please see page 110 for more details. [ 39 ] CCNP Security Firewall 642-617 Quick Reference Section 3 ASA Access Control Now that you have connectivity to the ASA and have configured basic networking settings on the ASA, you can start to look at making the ASA operate as a true firewall. This section covers the services offered by the ASA such as Network Address Translation (NAT) and Access Lists that make up the main foundation of protection offered by the Cisco ASA. Network Address Translation Network Address Translation (NAT) is a key concept and technology used by the ASA.

Step 2: Configure the Domain Name. Step 3: Generate the RSA keys. Step 4: Configure the local authentication. Step 5: Configure SSH on the specific interface. SSH configuration is similar to Telnet configuration. To configure SSH, navigate to Device Management > Management Access > ASDM/HTTPS/Telnet/SSH. As you did with Telnet, specify an interface, IP address, and subnet mask for the network that you want to grant SSH access to. You can use SSH on the outside interface without requiring IPsec because SSH supports strong authentication and encryption.

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