Thank you very much. 192.168.255.254 was deliberately picked to be a private-sector address that my router would black-hole, but this example will work with *any* unreachable IP.
Here is an example with an unreachable public IP: $ # unreachable public IP correctly times out $ ping -c 1 --timeout 5 149.14.210.192 PING 149.14.210.192 (149.14.210.192): 56 data bytes --- 149.14.210.192 ping statistics --- 1 packets transmitted, 0 packets received, 100% packet loss $ $ # same unreachable public IP shows a response when another working instance of ping is live $ ping -c 1 --timeout 5 149.14.210.192 & ping -c 1 1.1.1.1 [1] 68536 PING 1.1.1.1 (1.1.1.1): 56 data bytes PING 149.14.210.192 (149.14.210.192): 56 data bytes 64 bytes from 1.1.1.1: icmp_seq=0 ttl=55 time=106.868 ms --- 149.14.210.192 ping statistics --- 1 packets transmitted, 1 packets received, 0% packet loss round-trip min/avg/max/stddev = 106.868/106.868/106.868/0.000 ms 64 bytes from 1.1.1.1: icmp_seq=0 ttl=55 time=106.869 ms --- 1.1.1.1 ping statistics --- 1 packets transmitted, 1 packets received, 0% packet loss round-trip min/avg/max/stddev = 106.869/106.869/106.869/0.000 ms [1]+ Done ping -c 1 --timeout 5 149.14.210.192 $ Hope this helps, please let me know how else I can assist. best, Sirio ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Wednesday, December 8th, 2021 at 6:45 PM, Alfred M. Szmidt <a...@gnu.org> wrote: > Where is 192.168.255.254 routed on Darwin? > > I.e., what does say: > > ping -c 1 192.168.255.254 > > Or traceroute.