Dell SonicWALL GX250 Manual page 88

Note: If you want to enable the rule at different times depending on the day of the
week, you will need to make additional rules for each time period.
Note: Although custom rules may be created that allow inbound IP traffic, the
SonicWALL does not disable protection from Denial of Service attacks, such as the SYN
Flood and Ping of Death attacks.
7. In the User Idle Timeout section, define a value in minutes for the network con-
nection to timeout if a connection becomes inactive. If a connection to a remote
server remains idle for more than five minutes, the SonicWALL closes the connec-
tion. Without this timeout, Internet connections could stay open indefinitely, cre-
ating potential security holes.
8. To allow fragmented data packets over the connection, check the Allow Frag-
mented Packets box.
9. Click Update to add the rule to Current Network Access Rules list.
Current Network Access Rules List
All of your Network Access Rules are listed in the Current Network Access Rules
table. The rules are listed from most to least specific. The rules at the top of Current
Network Access Rules list take precedence over rules at the bottom of the list.
Edit a Rule
To edit a rule, click the Note Pad icon on the right side of the browser window. A new
Web browser window appears, displaying the current configuration of the rule. Make
the desired changes and click Update to update the rule. The modified rule is
displayed in the list of Current Network Access Rules.
Delete a Rule
To delete a rule, click the Trash Can icon at the right side of the browser window. A
dialog box appears with the message "Do you want to remove this rule?". Click OK.
Once the SonicWALL has been updated, a message confirming the update is displayed
at the bottom of the browser window.
Enable/Disable a Rule
To disable a rule without permanently removing it, uncheck the Enable checkbox to
the right of the rule. To enable a disabled rule, check the Enable checkbox. The
configuration is updated automatically, and a message confirming the update is
displayed at the bottom of the browser window.
Restore the Default Network Access Rules
If the SonicWALL Network Access Rules have been modified or deleted, you can
restore the Default Rules. The Default Rules prevent malicious intrusions and
attacks, block all inbound IP traffic and allow all outbound IP traffic. Click Restore
Rules to Defaults to reset the Network Access Rules. Once the SonicWALL has
Page 88 NETWORK ACCESS RULES