PIX 515e firewall problem

[ChrisHallJJ]

I have 100 mobile users accessing my server thru a pix 515e firewall and randomly after a few month of use (with no other issues) all users on the mobile group can no longer access the system. Non-mobile users however, assigned to a different group can still access the system.
Our technical support has recommended to cold boot the pix. They believe the NAT table is getting full. This solution does work but is a temporary fix rather than a solution. Does anyone have any other ideas as to what may be causing the problem or have any other recommendations for preventing it from happening in the future? This has happened at least three times in the last 12 months.
Thanks in advance,
Chris

 

[ChrisHallJJ]

Does anyone have any ideas on this????
Thanks, Chris

 

[andrewis]

instead of a cold boot try a "clear xlate"

 

[ChrisHallJJ]

The cold boot WILL work to reallow access (and possibly the "clear xlate" would too), but this is a fix after the fact.... I am trying to determine what is causing the condition to happen in the first place.
Does anyone know what would cause the pix to start preventing the mobile users from accessing the system after about 3-4 months of access?