Re: Filter by Packet's size

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On Mon, 2008-02-18 at 15:36 +0200, Покотиленко Костик wrote:
> В Пнд, 18/02/2008 в 09:25 -0300, Michael Fernández M пишет:
> > Hi, 
> > 
> > Is there a way to filter a picket by the size of it?, i mean I Would
> > like to filter all the packet hat it size 2 MB.
> > 
> > Is that possible?
> > 
> > Thanks to any answer.
> 
> iptables -m length --length 0:1024
> 

> But let me admit that normal packet length is up to 1500 bytes, in some
> cases up to 65535 bytes. Maybe you didn't correctly face the question?
> 

Yea, i know... but the thing is:

I have a mail server (Postfix), and if I restrict the size of messages
up to 2 MB.. then a user send an email (3 MB) and Postfix receive the
message an then say: "You cannot send this message because of the
size"... and send a notification to the user... so I want to stop the
packets before them arrives to Postfix... and take off this load to the
mail server...  

Now is better explain? 

Regars,...

Michael.-





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