We are using Anyconnect SSL vpn in our setup. But as the number of session are increasing, it starts dropping at the firewall. When we debugged the asp drops it shows
Attaching the log for reference. Check the connection between 188.8.131.52 > 184.108.40.206 > port 443
CTM returned error: ( as per information available on Cisco ) This counter will increment when the appliance attempts to perform a crypto operation on a packet and the crypto operation fails. This is not a normal condition and could indicate possible software or hardware problems with the appliance.
How many such drops do you have, look at "show asp drop". You could also hit some bugs, like this one for example. What software version are you using on the ASA? I would recommend to upgrade to 9.8.4 (latest interim version) or 9.12.3 (latest interim version), reload and see if you still get such messages.
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