The computers/laptops that are associated with the wireless zone of the Sonicwall UTM appliance with SonicOS Enhanced firmware are unable to send print jobs to a printer on the LAN. Similarly wireless devices associated with a SonicPoint(which in turn is connected to one of the TZ/PRO/NSA Firewalls) are unable to send print jobs to a printer on the LAN.

Resolution or Workaround

By default, SonicWALL blocks traffic from Wireless to LAN (click here to see the Default Access Rule), therefore wireless devices will not be able to communicate to the printer on the LAN Zone.

Printers use various ports for receiving a print job from users (Eg: Most of the Printers use Standard Port 9100 (TCP and UDP)),  opening the printer port (Eg: port 9100) from WLAN to LAN Zone resolves the issue.

Follow these steps to Add an Allow rule from WLAN to LAN:

1) Login to the SonicWALL Appliance, go to Firewall > Access Rules.
2) Select Matrix Style Viewing and select WLAN > LAN.
3) Click on Add button and configure the following;  

Action: Allow�
From Zone: WLAN
To Zone: LAN
Service: The custom created port for printing (Usually TCP & UDP port 9100 is used)
Source: Any
Destination: The address object for the printer on the LAN
Users Allowed: All
Schedule: Always on
Comment: Add a comment that gives the purpose of the rule (Eg: Print from WLAN to LAN) 

 Click Here to view an illustration of the rule

4) Click Ok to add this rule

Alternatively attach the printer to a windows server or pc, and use printer sharing.

Note: Please contact your printer manufacturer to know the exact port numbers used by your printer.