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How to restrict SSLVPN access to the SonicWall firewall based on Source WAN IP's?

07/15/2021 5 People found this article helpful 188,025 Views

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    Description

    This KB article depicts instructions on how to restrict SSLVPN connection to the SonicWall firewall appliance so that the device allows only authorized users to connect via SSLVPN. The SSLVPN users are limited for connection based on source Public IP addresses.

    Resolution

    Step 1 - SonicWall diag page setting change for auto-added access rules edit

    Step 2 - Creating Address Objects and Address Group(s)

    Step 3 - Updating the default SSLVPN access rule with the address objects created 


    Step 1 - SonicWall diag page setting change for auto-added access rules edit


    1. Login to the firewall and visit the diag page by replacing the keyword main in URL with diag (For ex: https://ipaddress/diag.html) and hit enter.

    2. Click on Internal Settings and search for the section Firewall Settings.

    3. Enable the checkbox Enable the ability to remove and fully edit auto-added access rules.

    Image


    4. Click on Accept to save the configuration.

    5. Click on CLOSE to visit SonicWall's conventional GUI.


    NOTE: Unfortunately, Gen 5 and Gen 5.5 firewall models are not embedded with the diag page option "Enable the ability to remove and fully edit auto-added access rules" to tweak the default rules/policies. Hence, Gen 5 and 5.5 firewall models do not follow this KB article. The embedded feature is available only from Gen 6 firewalls.


    Step 2 - Creating Address Objects and Address Group(s)


    6. Navigate to MANAGE | Objects | Address Objects page in the GUI.

    7. In the Address Objects tab, click Add.

    Image


    8. In the Address Object creation pop-up window, specify the Name, Zone Assignment, Type and IP Address details. (The address objects are created for the WAN IP addresses of the SSLVPN users)

    9. Click ADD.

    Image             Image

    10. Put the address objects together in an Address Group by navigating to Address Groups tab and click on Add. 

    Image

    11. In the Address Group creation pop-up window, specify the Name of the group, enforce the address objects from LHS to RHS and click OK.

    Image


    Step 3 - Updating the default SSLVPN access rule with the address objects created


    12. Navigate to Rules | Access Rules page and visit WAN to WAN rules section.

    13. Click on the Configure option of the default SSLVPN access rule as shown below.

    Image


    14. To modify the access rule, in the General tab, change the Source field to the address objects/group containing the preferred public IP addresses of SSLVPN users and click OK.

    Image


    15. The Default SSLVPN WAN access rule looks as below with source being specific.

    Image

    Related Articles

    • Bandwidth usage and tracking in SonicWall
    • How to force an update of the Security Services Signatures from the Firewall GUI
    • Configure Guest VLAN in the TZ firewall, for guest users to access Internet only.

    Categories

    • Firewalls > TZ Series
    • Firewalls > SonicWall SuperMassive 9000 Series
    • Firewalls > NSsp Series
    • Firewalls > NSa Series
    • Firewalls > NSv Series

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