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ASA 5520 issues with encrypted traffic

I have a few ipsec-vpns on cisco asa 5520 (2 in failover claster). In theese tunnels some rules no longer work. ASA stop encrypt outgoing trafic on some rules inside_network-outside_network.

Version of system - asa831-k8. And I can't upgrade it, couse Legislation in Russia

How can I fix this problem?

  • VPN
VIP Purple

Re: ASA 5520 issues with encrypted traffic

8.3(1) was the probably worst ASA-version ever with the most bugs on this platform. So I assume that the only solution is to upgrade.
As a workaround, regular reboots could help also. These are nearly non-disruptive in a failover cluster. For that reboot the standby unit, after that do a failover to the standby unit and reboot the former active unit. If that doesn't help (I had these situations log time ago) reboot both units at the same time.

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