We have a PIX firewall 515 E (no failover) with a simple configuration of allowing only web traffic from inside. PIX is with three ethernet interfaces and the DMZ is used rarely for specific requirements. A www server is hosted with authentication through aaa for incoming users in the inside.
For the last one week, PIX hangs every late evening. No traffic passes through the pix and we cannot ping any devices from pix as well. There are a lot of 'no buffers' counts seen in all the interfaces of PIX. CPU usage is about 21%.
Can anyone help in identifying whether this could be a hardware issue?
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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...