We have a NetWare 6.5 SP8 running BorderManager 3.9.2, latest patches and drivers from HP. For the past 10 days or so, it has been losing all TCP connectivity at seemingly random times, usually once a day. I've had to reboot the server to restore connectivity.
The console displays the following messages, which I have never seen before and cannot find any reference to:


The server itself is still responsive if I go to the rack console and interact with it there, but it loses all TCP connectivity to the internal and external network.

Has anyone seen these error messages before? Could this be some kind of attack?