Chapter 22 Configuring Connection Settings

Feature History for Connection Settings

Note When Authentication Absolute = 0, HTTPS authentication may not work. If a browser initiates multiple TCP connections to load a web page after HTTPS authentication, the first connection is permitted through, but subsequent connections trigger authentication. As a result, users are continuously presented with an authentication page, even after successful authentication. To work around this, set the authentication absolute timeout to 1 second. This workaround opens a 1-second window of opportunity that might allow non-authenticated users to go through the firewall if they are coming from the same source IP address.

•Authentication inactivity—Modifies the idle time until the authentication cache times out and users have to reauthenticate a new connection. This duration must be shorter than the Translation Slot value.

•Translation Slot—Modifies the idle time until a translation slot is freed. This duration must be at least 1 minute. The default is 3 hours. Enter 0:0:0 to disable the timeout.

•(8.4(3) and later, not including 8.5(1) and 8.6(1)) PAT Translation Slot—Modifies the idle time until a PAT translation slot is freed, between 0:0:30 and 0:5:0. The default is 30 seconds. You may want to increase the timeout if upstream routers reject new connections using a freed PAT port because the previous connection might still be open on the upstream device.

Feature History for Connection Settings

Table 22-1lists each feature change and the platform release in which it was implemented. ASDM is backwards-compatible with multiple platform releases, so the specific ASDM release in which support was added is not listed.

Table 22-1

Feature History for Connection Settings

 

 

 

 

 

 

 

Platform

 

Feature Name

 

Releases

Feature Information

 

 

 

TCP state bypass

8.2(1)

This feature was introduced. The following command was

 

 

 

introduced: set connection advanced-options

 

 

 

tcp-state-bypass.

 

 

 

Connection timeout for all protocols

8.2(2)

The idle timeout was changed to apply to all protocols, not

 

 

 

just TCP.

 

 

 

The following screen was modified: Configuration >

 

 

 

Firewall > Service Policies > Rule Actions > Connection

 

 

 

Settings.

 

 

 

Timeout for connections using a backup static

8.2(5)/8.4(2)

When multiple static routes exist to a network with different

route

 

 

metrics, the ASA uses the one with the best metric at the

 

 

 

time of connection creation. If a better route becomes

 

 

 

available, then this timeout lets connections be closed so a

 

 

 

connection can be reestablished to use the better route. The

 

 

 

default is 0 (the connection never times out). To take

 

 

 

advantage of this feature, change the timeout to a new value.

 

 

 

We modified the following screen: Configuration > Firewall

 

 

 

> Advanced > Global Timeouts.

 

 

 

 

Cisco ASA Series Firewall ASDM Configuration Guide

22-11

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Cisco Systems ASA Services Module Feature History for Connection Settings, Introduced set connection advanced-options
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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.

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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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