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
--
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