We like Cisco network equipment, but like any hardware vendor, they do have the occasional problem. In October, Cisco released this Field Notice:
https://www.cisco.com/c/en/us/support/docs/field-notices/642/fn64228.html
The affected units are not eligible for free replacement, unless the unit has an active SmartNet contract.
To find out if your Cisco ASA firewall is affected, see if the VID ends in:
ASA5506: “V03” or earlier
ASA5506H: “V03” or earlier
ASA5506W: “V05” or earlier
ASA5508: “V04” or earlier
ASA5516: “V04” or earlier
You can check this by looking at the bottom of the unit.
We’ve seen some failures of this type already, so if you have a possibly affected device, it should be replaced ASAP to avoid disruption of your business network and VPN.
Gorge Tech Services can assist you with identifying and, if necessary, replacing your firewall.