Building new Firewall for 20~30K users @ 1Gbps
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 I don't believe vSphere is free. I know pfsense offers an install instance you can easily install into a VM environment. But the actual VM software itself I don't believe is free. 
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 http://www.vmware.com/products/vsphere-hypervisor/ 
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 Learn something new everyday lol! If that's the case then all you'll have is hardware at that point and from there you can maybe setup pfsesnse in a load balance type setup. 
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 On another note I've found what I'm going to install on my new server I'm going to buy. 
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 And that is? 
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 ESXi 5.X free hypervisor :) 
 At least this is how I imagine what he ment :)
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 Yep!! I already use it at work for 2 or 3 test machines and since it's free and I have licenses for all the server OSes may as well take advantage of it. :) 
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 Good deal. 
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 This has got me wondering now how pfsense can be integrated into this with a load balancing type configuration. That would be an ideal solution. 
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 There are tons of links here and there on the subject of pfsense / cluster / carp / load balance. Etc Etc. I haven't tested any of them, but they should work in VM just fine if they work in physical machines. 
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 Ha I need to search more but you're right if they work in physical they should work in virtual and better actually.