Can someone explain the various arp things
Hi,
I'm trying to do ip accounting, where user access is controlled by MAC.
ok , so I've got an accouting rule in the iptables by IP, as I don't appear to be able to mark by mac inbound AND outbound.
So I'm using arp to translate ip to MAC, and upload the statistics.
now arp -a appears to take a few seconds on each run.
Whats the difference between
cat /proc/net/arp
arp
arp -a
what's all the stuff about referesh cache etc ?
Does arp -a send out requests , and give you current status of connected MACs ?
Thanks
Ian
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