Cisco Systems ASA 5585-X Manual De Usuario

 lists each feature change and the platform release in which it was implemented.

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 command was modified: set connection 
timeout

Timeout for connections using a backup static 
route

8.2(5)/8.4(2)

When multiple static routes exist to a network with different 
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 command: timeout 
floating-conn.

Configurable timeout for PAT xlate

8.4(3)

When a PAT xlate times out (by default after 30 seconds), 
and the ASA reuses the port for a new translation, some 
upstream routers might reject the new connection because 
the previous connection might still be open on the upstream 
device. The PAT xlate timeout is now configurable, to a 
value between 30 seconds and 5 minutes.

We introduced the following command: timeout pat-xlate.