Re: Port-forwarding Perfomance

[Rudi Starcevic <tech@wildcash.com>]

Hi,

Still having trouble with port-forwarding performance.

As much as I look I can't find anything wrong.

I have one Linux 66.283.12.21 box and one Windows box 192.168.0.10

I can download a file of the linux box at around 140K/s

That very same file on the Windows machine is around 15K/s using DNAT 
and Masq/Forwarding.

I'm very disappointed and did not expect to see anything like this, I 
had more like 10% in mind ...

The linux box is not under heavy load and there is only 431 connections 
being tracked.

Hmm .. I must have a problem else where, it just too hard to believe 
those download rate numbers.


Jose Maria Lopez Hernandez wrote:

>El mié, 23-02-2005 a las 17:33 -0800, Rudi Starcevic escribió:
>  
>
>>Hi,
>>
>>I have www port-forwarding setup and running OK.
>>
>>However I wonder if they way I have configured it is not the most 
>>optimal for speed and performance.
>>
>>I have a default policy of DROP with a total of about 30 rules.
>>
>>These rules below do my www port-forwarding, can you see if there is a 
>>better way to do this ?
>>
>># ENABLE FORWARDING / NAT / MASQUERADING
>>echo "1" > /proc/sys/net/ipv4/ip_forward
>>
>># NAT Forwarding Setup
>>$IPTABLES --table nat --append POSTROUTING --out-interface $ETH0 -j 
>>MASQUERADE
>>    
>>
>
>The only thing I can say about your rules it's that if you
>know the firewall IP it's much better to use SNAT than
>MASQUERADE, because you gain some speed with it.
>
>  
>
>>$IPTABLES -A FORWARD -i $ETH1 -j ACCEPT
>>$IPTABLES -A FORWARD -i $ETH0 -j ACCEPT
>>$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
>>
>># http Port-Forwarding setup
>>$IPTABLES -t nat -A PREROUTING -i $ETH0 -p tcp --dport 80 -d $MEDIA1_IP 
>>-j DNAT --to $MEDIA1_LO:80
>>    
>>
>
>The rule it's OK, I don't know how you can do it better to achieve
>more speed.
>
>  
>
>>Many thanks,
>>Kind regards
>>Rudi
>>    
>>
>
>Regards.
>
>  
>



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