hello ,,,
regarding to your question i suppose that if you install the e-smith server as a gateway server it shoule work fine locally but certain settings and script to apply if you want to publish it globally,,,,,main thing is your permanent connection to the internet,,second thing is you have to let your ISP or TELCO know what your running with ,,,,,this applies if you have a DNS name already ,,,it think you have to consult your ISP or TELCO about this as they are the ones who will help your system work fine....
bye
chris