If you are hosting any type of server in your network that needs to be accessed outside of the network, like for example a Web Server, E-mail Server or FTP Server, you will want to create a port forwarding rule to point the traffic to the necessary server and allow the traffic through the firewall. This guide will show you how to forward ports using the Public Server Wizard in SonicOS Enhanced.
Using the Public Server Wizard
1. Open a web browser (Chrome or Firefox is preferred) and navigate to your SonicWALL’s Internal IP Address
2. Enter your Username and Password to log into the firewall’s web interface
3. In the top Right corner, locate and click the Wizards button 
4. In the Configuration Wizard window, select Public Server Wizard and click Next
5. Choose the Server Type and click Next
Note: I will detail adding a custom service at the end of this guide
6. Enter the Name and IP Address of the server you are directing traffic toward and fill out a Comment (Optional). Click Next
7. Verify that the public IP Address listed is correct (Defaults to the SonicWALL’s WAN Interface IP) or change it to another accessible public IP and click Next
8. Verify that the information is correct, and click Apply
The wizard will complete able to access the server from outside the internal network by using the public IP address (or A Record if you have one configured).
Adding a Custom Service
1. Open a web browser (Chrome or Firefox is preferred) and navigate to your SonicWALL’s Internal IP Address
2. Enter your Username and Password to log into the firewall’s web interface
3. In the top Right corner, locate and click the Wizards button
4. In the Configuration Wizard window, select Public Server Wizard and click Next
5. In the Server Type field, choose Other and choose Create New Service.. under Services
6. Enter a Name for the custom service, Choose the Protocol (Usually TCP) and Enter the Port. Click OK to add the service
7. The custom service should now be available under Other > Service Name
