Hang Cisco ASA Firewall

Unanswered Question
Aug 3rd, 2010

Hello Experts,

Please answer the following queries:

1) Can Cisco ASA 5505 Firewall be Hang?

2) If yes, then what relevant steps are required to diagnose the hardware problems and how can it be rectify. If this problems appears then the failover firewall will be functional.


I have this problem too.
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Jennifer Halim Wed, 08/04/2010 - 02:45

1) Yes, ASA firewall can hang

2) There could be a number of things that can contribute to the firewall being in hung state. A few example would be if the ASA is being attacked, if the ASA is overloaded, if the ASA hits a bug due to specific condition, if memory leaks on the ASA, etc etc.

When the ASA is in hung state, it's important to at least grab a copy of the "show tech" output via console (if console did not hang), then depending on what the actual issue that triggers the hung state, TAC engineer will ask for more output.

Hope that answers your question.


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