The Ping Hosts Service

FOG 1.5’s ping host service is a TCP-only reachability check, not a real ICMP ping, and it has no configurable port or timeout. 1.6 changes what is actually sent and what the Last Ping and Last Check-In fields mean.

Which version am I on?

Check FOG Configuration → FOG Settings → General → FOG_VERSION in the web UI, or the version string printed at the top of installfog.sh.