From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Harel <hareldvd@ergolight-sw.com>
Subject: Re: How to block sending mail from local network.
Date: Sun, 08 Feb 2004 11:39:06 +0200
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References: <4024C335.7080705@ergolight-sw.com> <20040207201511.GA2097@zion.homelinux.com>
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To: Sven Schuster <schuster.sven@gmx.de>
Cc: netfilter@lists.netfilter.org

Thanks,

This works great.

Sven Schuster wrote:

>Hi David, 
>
>On Sat, Feb 07, 2004 at 12:51:33PM +0200, David Harel told us:
>  
>
>>Hi all,
>>
>>
>>I tried a command:
>>$IPTABLES -A OUTPUT -p TCP -i $LAN_IFACE -s $LAN_IP_RANGE --dport smtp 
>>-j DROP
>>but it did nothing.
>>    
>>
>
>This will only stop traffic generated on your gateway. To stop traffic
>going _through_ the gateway you will need to put this rule in the
>FORWARD rule instead of OUTPUT, so replace OUTPUT with FORWARD, you
>might try something like this:
>
>$IPTABLES -A FORWARD -p tcp --dprt 25 -i $LAN_IFACE -o $EXT_IFACE \
>	-j REJECT --reject-with tcp-reset
>
>HTH
>
>Sven
>
>  
>
>>What can I do to block those messages sending attempts?
>>
>>-- 
>>Thanks.
>>
>>David Harel,
>>
>>    
>>
>
>  
>

-- 
Thanks.

David Harel,

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