How to use a Sonicwall firewall with Exchange server

There are a number of ways one can connect an Exchange server to the outside world. my preference is using a firewall, a Sonicwall firewall to be precise, as they just work. And now, with the latest generation of Dell Sonicwalls, the wizards are even easier to run. Let me show you how

On the Public Server type page select mail server and chose the ports needed for your organisation, in my case it was port 25

On the server private network page, insert the name of the server and the internal address of the server

Next type the external address of the firewall

Finally you will reach the summary page, confirm the information in the summary and once you are happy, click apply and the sonicwall will auto configure the rules for you. Your exchange server will now be accessible to send and receive mail.