Black Manticore

Damaged version of Sonicwall NetExtender on Windows 7

edited by on January 31st 2017, at 08:55

When installing Sonicwall NetExtender 8.0.241 or later on Windows 7, you may get the following error:

"Damaged version of net extender detected on your system. Please re download net extender"

The reason for this error is you probably are missing Windows Update KB3033929, which adds SHA256 support into Windows. Because SHA256 certificates are now the new norm, the latest Sonicwall certificates also use this hashing algorithm. Without the update, Windows 7 and Server 2008R2 do not have support for SHA256.

You can resolve the issue by installing the update, then reinstalling NetExtender:

Download and install KB3033929.

Uninstall Sonicwall NetExtender (via Control Panel).

Delete ...

windows, sonicwall, netextender

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Add a second IP address on the LAN interface (no VLAN) on Sonicwall

edited by on May 18th 2016, at 16:09

You can add a secondary IP address on any interface (e.g.) without using VLAN tagging. This is useful if you have more than one subnet on your LAN, have no VLANs but want both subnets to be routable, without using an additional physical interface.

Create a static ARP entry for the gateway address of the additional subnet on the interface. Select the interface on which the subnet will be on. Enable Publish ARP. This will also automatically fill in the MAC address of the selected interface.

Create an address object for the additional subnet.

Add a static route for the additional subnet:Source: ANY

Destination: the address object you created in the previous step.

Service: ANY

Gateway: 0.0 ...

sonicwall, dell

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Configure basic SNMP on Sonicwall

edited by on November 9th 2015, at 10:54

You can quickly and easily enable SNMP on a Sonicwall for monitoring purposes. The instructions below are for SonicOS Enhanced, and has been tested on a NSA 2600 (although configuration should be similar on other models).

Log on to the Sonicwall through the web interface.

In the menu on the left, navigate to System → SNMP.

Check the Enable SNMP check box and click Accept.

Click the Configure button and verify/change the Get Community Name. By default, it is set to public. If you made changes, click OK.

By default, SNMP does not listen on any interface, so what's left is to enable it on one or more interfaces, depending on which interfaces, SNMP is required. Navigate to Network &r ...

firewall, sonicwall, monitoring

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Configuring port forwarding on Dell Sonicwall

edited by on April 28th 2015, at 15:24

This article is a quick reminder (for myself) on how to properly configure port forwarding on a Dell Sonicwall firewall.

First, create the address and services objects you need for the port forwarding. In case of multiple addresses or services, create a group and add all objects in that group.

Address object for a local server

Service group with multiple services

Predefined objects, such as the WAN IP are already present and do not have to be created again. Also, the advantage of using these predefined objects is that they are dynamic: e.g. if the WAN IP changes, the policies and rules that use this object will not have to be changed.

Once the objects are in place, they can be refer ...

computer, hardware, network, firewall, sonicwall, dell

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Configure message size limit on a Sonicwall E-mail Security Appliance (ESA)

edited by on February 17th 2015, at 13:36

https://support.software.dell.com/kb/sw6136

computer, software, network, sonicwall, dell, esa

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DynDNS.com on Sonicwall

edited by on February 3rd 2015, at 10:24

Last year, around May, DynDNS.com has changed their root certificates, causing Dynamic DNS using DynDNS.com no longer to work properly. The error (Network Error) is displayed immediately after adding the account to your Sonicwall.

The easiest solution is to upgrade to the latest firmware:

For 5.8, this is at least 5.8.4.0;
For 5.9, this is anything after June 2014.

Dell Support also offers an alternative, although this only works with more recent 5.9 versions:

https://support.software.dell.com/kb/sw11246

computer, firewall, sonicwall, dell, networking

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Dell Sonicwall and PPPoE connections

edited by on May 29th 2013, at 12:36

Important for PPPoE connections on a Dell Sonicwall: with the current firmwares, the MTU is not automatically lowered to 1492 when using PPPoE as your WAN interface type. By default, it remains on 1500, so you need to manually adjust it to 1492.

This can be done by going in to the interface properties → Advanced, where you'll find a field to set the MTU.

computer, network, firewall, sonicwall

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