Re: block ethernet IPv4 traffic

Linux Advanced Routing and Traffic Control

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> Anton Glinkov wrote:
>
>> On Mon, July 19, 2004 15:25, Ed Wildgoose said:
>>
>>>
>>>>the bridge thing is not possible.. the network is too big.. 300
>>>>machines..
>>>>with over 30 switches (only one of them is manageable) :(
>>>>Basically I want to deny ethertype 0800 (IPv4) packets for that LAN.
>>>>The only solution I thought of was to have a linux machine in this LAN
>>>>that has all the possible IP addresses set on its interface.
>>>>
>>>>
>>>
>>>Look, we can't help you until you explain the problem
>>>
>>>WHY is it not possible to have a bridge?  This only requires two network
>>>cards?
>>
>>
>> I want to block the traffic between _ANY_ 2 of the machines in the
>> network.
>
> How about giving them a netmask of /32 instead of /24 (or whatever you
> have) so that they only see themselves in the same network and then
> giving them a static route to the default gw (since it is outside of the
> /32).
>
> Then you can block all inter-client traffic at that single default
> gateway (or one hop "in front" of it, seen from the clients)
>

I don't have access to those machines :-)
they use internet via different ehternet protocol (PPPoE)


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