We experienced a problem with connectivity to our servers at 10:15am today 06/12/2013. Connectivity was restored at 10:25am.
It appears that at 10:15, our gateway firewall blocked access to the network.
We are now running on the backup firewall and investigating the issue with the primary firewall.
We have reloaded the primary firewall and are about to switch from backup to primary, which may produce an outage of 5 – 10 seconds.
The primary firewall was successfully reloaded and brought back on-line, and a test completed for failover from primary to backup firewall.
So we have returned to full resilience.