Re: pop3 and dns

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On Tue, May 11, 2004 at 10:37:36AM -0300, Peter Marshall wrote:
> I have an aside question ... Do you need to listen on both tcp and udp port
> 53 for DNS ?  Can you just listen on the UDP one ?  Does it require both ?
> 

udp for normal requests
tcp for zone transfers

A

> Thank you,
> 
> Peter Marshall
> 
> 
> ----- Original Message ----- 
> From: "Fritz Mesedilla" <fritz.mesedilla@xxxxxxxxxxxxxxxxx>
> To: "Netfilter Mailing List (E-mail)" <netfilter@xxxxxxxxxxxxxxxxxxx>
> Sent: Tuesday, May 04, 2004 6:40 AM
> Subject: pop3 and dns
> 
> 
> 
> Greetings!
> I have been looking for the answer to this through google...
> 
> How do I allow POP3 through my iptables rules?
> 
> I have done this...
> $IPTABLES -A FORWARD -p tcp --dport 53 -j ACCEPT
> $IPTABLES -A FORWARD -p udp --dport 53 -j ACCEPT
> 
> $IPTABLES -A FORWARD -p tcp --dport 110 -j ACCEPT
> 
> I included the dns forward rule to allow the internal clients to be able to
> resolve pop3 domain names.
> 
> The problems:
> 1) They still can't resolve domain names.
> 2) POP3 can't seem to pass through going outside from the internal clients.
> 
> Please advise me to what I still need to add. Thanks.
> 
> Cheers,
> 
> fritz <www.mesedilla.com>
> ---
> + Basta Ikaw Lord
> 
> 
> 
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