Hi,
I am monitoring AXIS IP cameras. Dude (V6.37 admin log on using 386 box) ping is works on about half the cameras ... but fails (ping reply not received (13)) on the other half of the same type of IP cameras.
Command line line ping works on on all cameras. This happening on other devices - so far.
Any suggestions?

If possible try out latest v6.38rc build. We fixed one bug that could cause issues like you described.

I´ve noticed that in some devices that have high delay the default "1000ms" for the ping actually indicate 100ms. for example, for a satellite station with 600 ms of ping I have to set to 7000ms in order to receive an answer other than timeout.