//When connected to my LAN
$ ping -s 1500 192.168.100.5
PING 192.168.100.5 (192.168.100.5) 1500(1528) bytes of data.
1508 bytes from 192.168.100.5: icmp_req=19 ttl=64 time=1.00 ms
1508 bytes from 192.168.100.5: icmp_req=20 ttl=64 time=1.05 ms
1508 bytes from 192.168.100.5: icmp_req=21 ttl=64 time=1.03 ms
//When connected via VPN
$ ping -s 1500 192.168.100.5
PING 192.168.100.5 (192.168.100.5) 1500(1528) bytes of data.
From 192.168.102.2 icmp_seq=1 Destination Host Unreachable
From 192.168.102.2 icmp_seq=2 Destination Host Unreachable
From 192.168.102.2 icmp_seq=3 Destination Host Unreachable