Help needed finding cause of kernel crash (?)

I am having problems with a server running a custom built 2.4.20 kernel. It is crashing every other day and I can't find any logs telling me what is going on at the crash moment. The symptoms are: 1. About once per week all networking services but ping stop working requiring us to ask our ISP for

Help needed tracking possible hardware related crash

I don't have any hopes a quick solution but would appreciate tips on how to track down the problem described below. I suspect it is a hardware problem but I don't seem to find any logs telling me what is going on at the crash moment. The symptoms are: 1. About once per week all networking services