Re: Tee packets

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.

--

"They that give up essential liberty to obtain temporary safety,
deserve neither liberty nor safety." (Ben Franklin)

"The course of history shows that as a government grows, liberty
decreases." (Thomas Jefferson)




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