SonicWALL Internet Security Appliances - Manual (Page 130)

Network Access Rules Page 131
4. Select the IP protocol type, TCP, UDP or ICMP, from the Protocol list.
5. Click Add. The new service appears in the list on the right side of the browser window.
Tip If multiple entries with the same name are created, they are grouped together as a single service
and can not function as expected.
Enable Logging
You can enable and disable logging of events in the SonicWALL Event Log. For example, if Linux
authentication messages are filling up your log, you can disable logging of Linux authentication.
1. Highlight the name of the desired service in the list.
2. Clear the Enable Logging check box.
3. Click Modify.
Delete a Service
To delete a service, highlight the name in the list, and click Delete Service. If multiple entries with
the same name exist, delete all entries to remove the service.
Rules
The SonicWALL evaluates the source IP address, the destination IP address, and the service type
when determining whether to allow or deny traffic. Custom rules take precedence and override the
SonicWALL default rules.
By default, the SonicWALL blocks all traffic from the Internet to the LAN and allows all traffic from
the LAN to the Internet. Custom rules can be created to modify the default rules. For example, rules
can be created for the following purposes:
•
Allow traffic from the Internet to a mail server on the LAN.
• Restrict users on the LAN from using a specified service, such as QuickTime.
• Allow specified IP addresses on the Internet to access a sensitive server on the LAN.
• Configure bandwidth management for individual services.