Ed Greshko wrote:
14:48:19.063647 arp who-has 10.9.226.129 tell 70.41.148.1
The above are ARP broadcast packets. ARP stands for Address Resolution
Protocol.
It is a bit strange to see these in your network since ARP broadcast packets
aren't supposed to survive past the subnet they are transmitted on. The
purpose of the ARP request is to get the MAC address of a given IP address.
Taking one line of your output above...
14:48:10.668593 arp who-has 70.41.115.191 tell 70.41.112.1
The source of the ARP message is 70.41.112.1. It is sending out a broadcast
message asking "Who ever has IP address of 70.41.115.191, please respond
with your MAC address".
You aren't seeing the response...but if you had you'd see something like:
07:27:51.893480 arp reply 70.41.115.191 is-at 00:30:6e:c7:63:8f
These packets are coming into your network. They are 42 bytes long. You'd
have to have a whole heck of a lot of these to drive up your network usage.
In any case, they are inbound and not associated with any requests from
your side so it is unlikely that the ISP is counting these as your traffic.
I have seen this kind of thing.
we were using a four-port ADSL switch/router. Ordinarily, one uses it to
manage the Internet connexion, and plugs up to four computers into it.
I think what I tried to do is put it into bridging mode, attach it to
(say) eth0, run rp-ppp (or similar) on eth0 _and_ give eth0 an IP
address so it could talk to other computers on the eth0 network.
I had a reason to run tcpdump and did not like what I saw, so I reverted
to a more conventional configuration.
--
Cheers
John
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