I am with a problem in one of the firewalls of my company.
- Almost everyday the firewall stop working and I need to restart it because I lose the remote access; - This is a ASA 5505 with 7.2.4 firmware; - There is a configuration default that I use in all firewalls of my company, including others with the same model, firmware e type of traffic, but just this firewall presents it issue; - We changed the firewall for another with the same model and 8.2.1 firmware; - We changed the power supply and power cable; - The temperature and energy meters are ok; - When the problem occurs, no logs are sent to Syslog Server; - Using the console interface, we checked the interface status (protocol up) and statistics (no errors, but no traffic, too), logging (no logs), routing table (right and complete), arp table (complete and I believe that is right), cpu (less than 10%) and memory (less than 50%). - We changed the 5505 for a 5510 with ASA 8.2.1; - This firewall has three interfaces (inside, dmz and outside): - Yesterday, we had a problem and we did the following procedures: - We disconnected the cable from the inside interface, the problem persisted; - We reconnected the cable to the inside interface; - We disconnected the cable from the outside interface, the problem persisted; - We reconnected the cable to the inside interface; - We disconnected the cable from the dmz interface, the firewall returned to work; - We reconnected the cable to the dmz interface, it continues working - We changed the switch connected to dmz interface; - Today, we had a new problem, but this time, the problem was resolved when we disconnected and reconnected the cable from the outside interface.
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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...