Tee packets

[Stephen Clark]

Miroslav Lachman wrote:

>Stephen Clark wrote:
>
>  
>
>>Hello List,
>>
>>We have a monitoring app that receives udp packets from units in the 
>>field. We are in
>>the process of increasing the number of units we have reporting and are 
>>seeing some
>>performance issues with our current hardware. I would like be able to 
>>somehow route a
>>copy of each packet to another machine so I can test out different 
>>hardware configurations
>>to see how performance is affected.
>>
>>Any ideas on the best way to do this?
>>    
>>
>
>If you are using PF as your firewall, you can use dup-to (man pf.conf)
>
>"The dup-to option creates a duplicate of the packet and routes it
>like route-to.  The original packet gets routed as it normally would."
>
>Miroslav Lachman
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>
>  
>
Thanks for the response - I am not using pf - this on freebsd 4.10.
I did solve the problem by using ipfw - tee option and wrote a quickie
userspace app
to change the destination address.

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