You will have to do some snooping on the type of traffic to identify the
source.

Please use ethereal and iptraf to analyse the type of traffic, source
port, destination port, transport layer protocol in use (UDP/ TCP/ etc),
link layer (ARP/ RARP etc), application layer protocol in use (NMB etc),
that will provide a hint to the reason and orignator of the traffic.

Some possible reason is NMB master browser selection polls in windogs
machines, too many ARP requests, some other type of broadcasts,
misbehaving h/w, viruses

Some possible solutions, use a switch inplace of a hub, do some subnetting
(physically seperate networks), use smaller subnets for your local lan
(use a number of class C networks inplace of one big class A or class B
network, connect them using multiple interfaces with your gateway, add a
few more nic cards to the gateway if you cant afford a router)


Blocking ports may be considerd but once you know what the problem is.


> Hi all,
>
>    I am using a Fedora Code 3 system as my gateway server. This is
> configured to run NAT. In the last couple of days I feel verry high
> data traffic in the gateway. I disconect my local lan from the gateway
> and confirm that the origin of these packets are from the same gateway
> system.
>
>   Most intresting part of this is, after two or three hours the data
> traffic automatically stops and the very next day it start almost the
> same time.
>
>  Anyone have idea how can identify the process which send these pakets ?
>  Any good antivirus software exist to remove the same ?
>  Any one face these type of problems early ? any solutions ?
>
> --
> Shijithlal L V
> Fischer Systems India
> 224 NILA Technopark
> Trivandrum 695581
> INDIA
>
> Ph:  91 471 2527427
> Cell: 91 9446380196
> email: [EMAIL PROTECTED],[EMAIL PROTECTED]
>
>
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