Constant activity on router / cable modem - ARP???

Constant activity on router / cable modem - ARP???

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Subject Author Date
Constant activity on router / cable modem - ARP??? retkaa 12-23-2005
Posted by Bill M. on December 23, 2005, 11:12 am
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wrote:

>I've seen the same thing on some of Comcrap's setups. They have some
>system(s) pumping out constant ARP (Address Resolution Protocol)
>messages to potential messages. For example, you'll see 216.100.100.1,
>216.100.100.2... Frankly, I think that they're looking for invalid
>connected systems. Even though your router should be set to ignore
>ping requests,

ARP and ping are completely different.

>it will always respond to ARPs.

If it didn't, you wouldn't be connected to the network. For ARP
requests that don't match the mask, about the only 'response' is to
flash the LED. Big whoop. There are no packets being sent in response
to ARP's that don't match the mask.

>I complained about it
>to Comcrap and they simply denied that the messages exist.

Why complain about something that doesn't cause any trouble?

--
Bill

home networking made easy, greater protection, less stress, introducing nm 5.0, 728x90
Posted by Bit Twister on December 23, 2005, 12:19 pm
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On Fri, 23 Dec 2005 16:12:53 GMT, Bill M wrote:

> If it didn't, you wouldn't be connected to the network. For ARP
> requests that don't match the mask, about the only 'response' is to
> flash the LED. Big whoop. There are no packets being sent in response
> to ARP's that don't match the mask.
>
> Why complain about something that doesn't cause any trouble?

Well, I had the Motorola sb4xxx something modem, I was
getting about 10 arps every second. It tended to create lots of
firewall entries in the system log until I told the firewall to drop
them and not log. Also the send/recieve led was usless because it was
always running.

Why should I have to waste my cpu processing power on all the freaking arps
when I did not have to.

Now that I have installed a Motorola SURFboard sb5120, no freaking arp
requests. Leds now act normally.


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other useful resources:
The Federal Communications Commission (FCC)
Telecommunications Industry Association
Electronic and Software Security Products and Services
International Telecommunication Union

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