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MiLK_MaN's avatar
MiLK_MaN
Icon for Nimbostratus rankNimbostratus
Apr 28, 2014

I've really only ever seen two levels, that being a network firewall out the front and then the WAF just behind it. This is usually done because the network firewall is the gateway to all IP traffic into a network, and the WAF is typically procured purely for HTTP based protection.

 

Without going into your network design thoroughly, I can't comment on the three levels of firewalling.