Have you thought of examining the TCP timestamp field? Not necessarily for accurate uptime, but a way to determine if the hosts are the same.
Or some of the other fingerprinting methods? nmap has options for uptime and other fingerprinting : https://nmap.org/book/osdetect-usage.html Of course, all this assumes the hosts are connected directly without any load balancing or some sort of firewall/proxy that fiddles with the packet data... cheers, Jamie _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"