I have 2 ACS 4.0 servers that are in production. Every 4 to 5 weeks user are suddenly unable to authenticate using EAP-TLS. When I check the failed attempts log the error message is "external user not found". I reboot the servers and everything is fine for another few weeks. Any ideas on why this happens would be appreciated. Thanks.
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...