Chapter 4 Configuring Network Object NAT (ASA 8.3 and Later)

Configuring Network Object NAT

•Click the browse button, and create a new address from the Browse Translated Addr dialog box.

Typically, you configure the same number of mapped addresses as real addresses for a one-to-one mapping. You can, however, have a mismatched number of addresses. For more information, see the “Static NAT” section on page 3-3.

Step 7 (Optional) For NAT46, check Use one-to-one address translation. For NAT 46, specify one-to-one to translate the first IPv4 address to the first IPv6 address, the second to the second, and so on. Without this option, the IPv4-embedded method is used. For a one-to-one translation, you must use this keyword.

Step 8 (Optional) Click Advanced, and configure the following options in the Advanced NAT Settings dialog box.

•Translate DNS replies for rule—Translates the IP address in DNS replies. Be sure DNS inspection is enabled (it is enabled by default). See the “DNS and NAT” section on page 3-31for more information.

•Disable Proxy ARP on egress interface—Disables proxy ARP for incoming packets to the mapped IP addresses. See the “Mapped Addresses and Routing” section on page 3-22for more information.

•(Required for Transparent Firewall Mode) Interface:

–Source Interface—Specifies the real interface where this NAT rule applies. By default, the rule applies to all interfaces.

–Destination Interface—Specifies the mapped interface where this NAT rule applies. By default, the rule applies to all interfaces.

•Service:

–Protocol—Configures static NAT-with-port-translation. Choose tcp or udp.

–Real Port—You can type either a port number or a well-known port name (such as “ftp”).

–Mapped Port—You can type either a port number or a well-known port name (such as “ftp”). When you are finished, click OK. You return to the Add/Edit Network Object dialog box.

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ASA Services Module, ASA 5555-X, ASA 5545-X, ASA 5585-X, ASA 5580 specifications

Cisco Systems has long been a leader in the field of network security, and its Adaptive Security Appliance (ASA) series is a testament to this expertise. Within the ASA lineup, models such as the ASA 5505, ASA 5580, ASA 5585-X, ASA 5545-X, and ASA 5555-X stand out for their unique features, capabilities, and technological advancements.

The Cisco ASA 5505 is designed for small businesses or branch offices. It provides essential security features such as firewall protection, flexible VPN capabilities, and intrusion prevention. The ASA 5505 supports a user-friendly interface, allowing for straightforward management. Its built-in threat detection and prevention tools provide a layered defense, and with scalability in mind, it can accommodate various expansion options as organizational needs grow.

Moving up the line, the ASA 5580 delivers greater throughput and advanced security features. This model is suited for medium to large enterprises that require robust protection against increasingly sophisticated threats. Its multi-core architecture allows it to manage high volumes of traffic seamlessly while maintaining excellent performance levels. The ASA 5580 also supports application-layer security and customizable access policies, making it highly adaptable to diverse security environments.

The ASA 5585-X further enhances Cisco's security offerings with advanced malware protection and extensive security intelligence capabilities. It incorporates next-generation firewall features, including context-aware security, and supports advanced threat detection technologies. This model is ideal for large enterprises or data centers that prioritize security while ensuring uninterrupted network performance and availability.

For enterprises requiring a balance of performance and security, the ASA 5545-X presents a compelling option. This model features scalable performance metrics, high availability, and integrated advanced threat protection. Coupled with advanced endpoint protection and detailed monitoring capabilities, the ASA 5545-X enables organizations to manage their security posture effectively.

Lastly, the ASA 5555-X blends cutting-edge technologies with strong security infrastructures. It boasts high throughput and the ability to execute deep packet inspections. Its sophisticated architecture supports threat intelligence feeds that provide real-time security updates, making it a powerful tool against modern threats.

Each of these Cisco ASA models brings specific advantages to varied environments. Their integrative capabilities enable businesses to enhance their security postures while benefiting from seamless scalability and management. As cybersecurity threats evolve, these advanced appliances play a vital role in protecting valuable digital assets.
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