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FYI.Careful when doing translations all to 1. This is called PAT (Port address translation) a form of NAT. I am doing the same thing even though they say it doesn't work well with multimedia applications since PAT differentiates by port.10.10.10.1 ...
the command nat (dmz) 0 x.x.x.128 255.255.255.240 will disable NAT on that interface. The inside users will have no problem hitting the DNS but a conduit statement need be in place for outside since the security ID will be from lower to higher.