I am have been having problem with pfsense becoming unresponsive and not allowing traffic to pass-through (most of the time established connection will continue to work, i.e. I have a site 2 site connection running and that will still be functional) or access to the web interface. I have 4 pfsense servers (all the VMs running on ESXi 5.0) configured in 2 CARP pairs. 1 set is configured as a firewall / router and the other set is configures as a layer three switch. Both pairs are having the same problem and there is no consistency as to when the problem will happen. Some times it is after a day or two other times it will be after 10 to 14 days. The server will respond to ping and this event is not trigging a CARP fail-over. The console via vSphere is still operational during this time and I have tried to reboot the server with option 5 "Reboot system" but the server will hang and never shutdown. I have to use VM -> Power -> Reset in the vSphereclient to restart the server. Once the server comes back online it will be operating normally again. I started this setup with 2.0.1 (no CARP) and am now currently running 2.1 (with CARP). The problem started after the upgrade from 2.0.1 to 2.0.2. I implemented CARP after the upgrade to 2.0.2.
I am currently experiencing this problem with my layer three cluster.
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