On 2020-02-01 06:16, Samuel Sieb wrote:
An ARP lookup is only done on sending, not receiving.
Humm.... That appears to be incorrect.
I have 3 systems on a LAN.
192.168.122.1 meimei (also the gateway) 192.168.122.2 frk 192.168.122.152 f31k
I ssh into frk and f31k from meimei and I see....
[egreshko@frk ~]$ arp Address HWtype HWaddress Flags Mask Iface _gateway ether 52:54:00:9a:e8:49 C enp1s0
[egreshko@f31k ~]$ arp Address HWtype HWaddress Flags Mask Iface _gateway ether 52:54:00:9a:e8:49 C enp1s0
Then I attempt ssh from frk to f31k. I say attempt since I have password authentication disabled and f31k doesn't have the needed authorized_keys.
[egreshko@frk ~]$ arp Address HWtype HWaddress Flags Mask Iface f31k ether 52:54:00:9b:21:c1 C enp1s0 _gateway ether 52:54:00:9a:e8:49 C enp1s0
[egreshko@f31k ~]$ arp Address HWtype HWaddress Flags Mask Iface _gateway ether 52:54:00:9a:e8:49 C enp1s0 frk ether 52:54:00:f8:08:79 C enp1s0