May 2017
Beginner
552 pages
28h 47m
English
Content preview from Linux Shell Scripting Cookbook - Third Edition
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Tracing recent IP connections and the ARP table
The ip neighbor command reports known relationships between the IP address, device, and hardware MAC address. It reports whether the relationship was reestablished recently or has gone stale:
$> ip neighbor 192.168.1.1 dev eth0 lladdr 2c:30:33:c9:af:3e STALE 192.168.1.4 dev eth0 lladdr 00:0a:e6:11:c7:dd STALE 172.16.183.138 dev vmnet8 lladdr 00:50:56:20:3d:6c STALE 192.168.1.2 dev eth0 lladdr 6c:f0:49:cd:45:ff REACHABLE
The output of the ip neighbor command shows that there has been no recent activity between either this system and the default gateway, or this system and the host at 192.168.1.4. It also shows that there has been no recent activity in the virtual machines and the host at