Some of what is in here will work for you:

http://blog.datajelly.com/2007/12/using-apache-for-ssl-offloading-and.html

Notice the 'addoutputfilter DEFLATE' lines.

Not as fast as varnish, but it'll do in a pinch.

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it will be in front of varnish

i also need it to not be based on domains, just pass everything through

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Modify Pound? Adding gzip support sounds pretty straight forward.

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Then I'll just modify varnish :) nginx or apache does it, so I will try either.

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