Essential Credential Reset

Description

Overview

This document contains three main sections containment, remediation and monitoring. Containment reduces the risk of an exposed firewall configuration being leveraged to gain access to the network. Remediation is the process of reconfiguring potentially exposed secrets and passwords. Monitoring will identify potential threat activity.

This article outlines the essential steps required to reset the credentials of commonly used features in SonicOS which may be configured to be accessible via the internet. These remediation steps include links to other resources such as KB articles and Admin Guides with step-by-step directions for resetting various passwords, shared secrets, encryption keys, and TOTP bindings across SonicOS.

Begin with the Containment section below.  Once containment is complete, you can proceed to the Remediation IF/THEN section to determine the recommended steps based on the features enabled on the target firewall.

Containment

Disable or restrict access to services from WAN

  • Disable or restrict access to HTTP/HTTPS & SSH Management over the WAN.
  • Disable or restrict access to SSL VPN, IPSEC VPN, and SNMP until the actions below have been completed.
  • Disable or restrict inbound WAN access to internal services allowed via NAT/Access Rules.

It is very important that containment is done before moving on to the remediation steps.

Disabling or restricting access to the SSLVPN Service and Web/SSH Management over the WAN to known addresses helps to ensure that an attacker is unable to regain access to compromised user accounts after forcing a password change and/or resetting TOTP bindings. Additionally, due to the dependencies associated with changing passwords and shared secrets, it is also important to update the password in other relevant locations. Such locations may include, but are not limited to, the remote IPSec Gateways/peer VPN endpoints, LDAP/RADIUS servers, wireless clients, dynamic DNS providers, etc.

SonicOS 6.5.5.1 and 7.3.0 also contain enhancements that allow an administrator to restrict a user account’s access until the password has been changed, ensuring that users change their password from within the perimeter if desired. In the absence of this feature, disabling or restricting access from the WAN is the most effective course of action.

Disabling or restricting inbound access from the WAN to internal services can prevent any threat actor from regaining access to any potentially compromised systems.

NOTE: If managing via GMS, restricted inbound HTTPS may be required.  Proceed to the next section, Restricting access to HTTP/HTTPS/SSH Management, for details.

 

Disabling Access

Disabling access to HTTP/HTTPS/SSH Management

  1. Navigate to NETWORK | System | Interfaces.
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  2. Edit each WAN interface. Disable the HTTPS/SSH Management options. Click OK.
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Restricting access to HTTP/HTTPS/SSH Management

Alternatively, you can limit access to only known/trusted IP addresses if you are unable to disable management over the WAN completely. Refer to the KB article titled How can I enable or disable SonicWall firewall management access? for step-by-step instructions on restricting management access.

 

Disabling access to SSLVPN

  1. Navigate to NETWORK | SSL VPN | Server Settings.
  2. Under the SSL VPN STATUS ON ZONES header, disable the service on the WAN Zone.
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Restricting access to SSLVPN

Alternatively, you can limit access to SSLVPN services to only known/trusted IP addresses if you are unable to disable SSLVPN completely. Refer to the KB article titled How to Disable Virtual Office Portal Access for step-by-step instructions on restricting SSLVPN access.

 

Disabling access to IPSec VPN

  1. Navigate to NETWORK | IPSec VPN | Rules and Settings. Click on the Settings tab. Disable the Enable VPN option. Click OK.
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Restricting access to IPSec VPN

Alternatively, you can limit IPSec VPN access to only known/trusted IP addresses if you are unable to disable IPSec VPN completely. Refer to the KB article titled How to restrict who can connect through GVC for step-by-step instructions on restricting access.

 

Disabling or restricting access to internal servers

Below are the brief steps. Refer to the KB titled How can I enable port forwarding and allow access to a server through the SonicWall? (Creating the necessary Firewall Access Rules) for more information.

  1. Navigate to POLICY | Rules and Policies | Access Rules.
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  2. Filter the rules or use the search field to find rules that allow inbound access from the WAN zone or any WAN interfaces to internal servers.
  3. Edit each applicable rule, disable the rule, then click Save. Alternatively, select each applicable rule and click Disable. Alternatively, the source address can be set to an Address Group object containing the known/trusted addresses that would be allowed through the rule.
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Disabling SNMP

  1. Navigate to DEVICE | Settings | SNMP.
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  2. On the SNMP tab, disable the Enable SNMP option. Click Accept. Refer to the SonicOS 7 Admin Guide (Enabling and Configuring SNMP Access) for more information.

 

Remediation

Remediation Overview

The following checklist provides a structured approach to ensure all relevant passwords, keys, and secrets are updated consistently. Performing these steps helps maintain security and protect the integrity of your SonicWall environment. The critical items are listed first. All other credentials should be updated at your convenience. Please note that the passwords, shared secrets, and encryption keys configured in SonicOS may also need to be updated elsewhere, such as with the ISP, Dynamic DNS provider, email provider, remote IPSec VPN peer, or LDAP/RADIUS server, just to name a few. Failure to do so can cause Internet and/or VPN outages or disruption to certain services such as authentication, log/alert forwarding, etc.

You may have received communication from SonicWall regarding a new preferences file to import into your firewall. The modified preferences file provided by SonicWall was created from the latest preferences file found in cloud storage. If the latest preferences file does not represent your desired settings, please do not use the file. Instead, please follow the documented instructions for manual remediation. For information on remediation using the provided preferences file, please refer to the Remediation through updated preferences file KB article.

 

Service

Remediation Step Description

Critical

Dependency

Comments

Local Users

Reset and update passwords of all Local Users.

🚩

 

Force all local users to set a new strong password. Resources and brief steps are available in the remediation instructions.

Users TOTP

 

Reset TOTP on all users.

🚩

 

Re-enroll TOTP for all users. Users will need to re-bind their authenticator app. Resources and brief steps are available in the remediation instructions.

Users

Update the password used for binding LDAP and/or shared secrets for RADIUS/TACACS+ Authentication.

 

Authentication Methods:

 

🚩

Update password on LDAP, RADIUS, or TACACS+ server(s)

Update the bind account password in LDAP, then update the LDAP server entry in SonicOS. Likewise, update the RADIUS/TACACS+ shared secret on the server and SonicOS. Resources and brief steps are available in the remediation instructions.

IPSec VPN

Update the shared secret in all IPSec site-to-site and GroupVPN policies.

🚩

The shared secret must also be updated on the Remote IPSec Gateways/Peer VPN endpoints

Replace old IPSec VPN pre-shared keys with new values. Do this for all IPSec VPN policies. To minimize disruption impact, ensure that the secret has been shared with the administrator of the remote VPN endpoints. For site-to-site VPNs, the shared key needs to be updated on the remote VPN peer. For GroupVPN, the pre-shared key may need to be shared with IPSec clients if “Simple client provisioning” is disabled in the GroupVPN policy. Resources and brief steps are available in the remediation instructions.

L2TP/PPPoE/PPTP

Update the passwords used for any L2TP/PPPoE/PPTP WAN interfaces.

🚩

Update password with ISP(s)

Refresh credentials used for WAN interface authentication. Should be done in coordination with the ISP account change to minimize disruption. Resources and brief steps are available in the remediation instructions.

CSE

Follow instructions to reset Cloud Secure edge connector Authentication 

🚩

Update CSE API Key 

Follow the instructions to reset the API token used by the CSE connector.

Advanced Routing

Update passwords used for routing protocols such as RIP, OSPFv2, and BGP.

🚩 

Update the passwords on the associated L3 switches, routers, etc.

Update the passwords associated with any advanced routing configuration. This should be done in coordination with the changes on the peer devices to minimize disruption. Refer to the following resources for more information:

AWSAPI

Update the AWS keys used for Logging and VPN integration.

 

Update on AWS Console

Generate new IAM access keys and update them in the SonicWall settings.

Refer to this KB article and the SonicOS 7.0 Admin Guide (AWS Configuration) for more information.

SNMP

Update the password for any SNMPv3 user entries.

 

SNMP monitoring host(s)

Reset SNMPv3 user credentials to maintain monitoring security. The passwords will also need to be updated on the SNMP monitoring hosts to restore SNMP access. Resources and brief steps are available in the remediation instructions.

WWAN

Update the passwords used for any cellular WWAN connections.

 

Update password with ISP(s)

Refresh WWAN account credentials used for backup WAN connections. Should be done in coordination with the ISP account change to minimize disruption. Resources and brief steps are available in the remediation instructions.

DDNS

Reset Dynamic DNS provider account password on the provider’s website. Update the DDNS entry in SonicOS.

 

Update account password with DDNS provider(s)

Update the password of each DDNS account at the provider’s website. On the firewall, update the password for each DDNS entry. This should be done in coordination with the dynamic DNS account change to minimize disruption to DDNS name resolution.

Refer to the KB titled How To Configure Dynamic DNS for a particular Interface for more information.

Clearpass

Reset passwords to Network Access Control (NAC) Clearpass servers.

 

Update password on NAC server(s)

This should be done in coordination with the change to the NAC servers to minimize disruption to the NAC servers. Refer to the KB titled How to add a Clearpass server on a SonicWall firewall for more information.

Email Logs

Reset the password to email accounts used for Log Automation.

 

Update password with email provider

Update email credentials used for log/alert forwarding and OTP emails. This should be done in coordination with the email account update to minimize disruption to email delivery. Refer to this KB article and the SonicOS 7.1 Admin Guide (FTP Log Automation) for more information.

FTP/Web Passwords

Reset the password to any FTP/HTTPS* servers used for Log automation, Packet Monitor, Settings and TSR scheduled reports, Dynamic External Address Objects/Groups, and Dynamic Botnet List Server. *The Dynamic Botnet List Server supports FTP and HTTPS credentials.

 

Update password on FTP/HTTPS server(s) used with the listed features of SonicOS

Reset FTP/HTTPS credentials for automated tasks and reports. These areas include Log automation, Packet Monitor, Settings and TSR scheduled reports, Dynamic External Address Objects/Groups, and Dynamic Botnet List Server. The Dynamic Botnet List Server supports FTP and HTTPS credentials.

 

Refer to the following resources for more information:

Extended Switches

Reset the password for any Dell/SonicWall-integrated external switches managed by the firewall.

 

 

Update management passwords for integrated switches. Refer to this KB article for more information.

Wireless

Update the shared keys for the Internal Wireless interface, Access Points & Profiles, and Virtual Access Points & Profiles.

 

Wireless clients

Rotate WPA/WPA2/WPA3 passphrases and profile keys. Wireless clients will need to update their connection profile. IoT devices may require a manual profile update. Resources and brief steps are available in the remediation instructions.

SonicPoint/SonicWave

Reset SonicPoint/SonicWave L3 SSLVPN Management password.

 

Update password on the managing SSLVPN server

Update the password used for SSLVPN management on SonicPoint/SonicWave. This should be done in coordination with the change on the SSLVPN server the access points connect to for L3 management. Refer to the SonicOS 7.0 Admin Guide (Access Point Provisioning Profiles) for more information.

SonicPoint/SonicWave

Reset SonicPoint/SonicWave Administrator password.

 

 

Update the password used to access individual SonicPoint/SonicWave access points. Refer to the SonicOS 7.0 Admin Guide (Access Point Provisioning Profiles) for more information.

SonicPoint/SonicWave

Reset SonicPoint/SonicWave/Internal Wireless RADIUS server shared secrets for Remote MAC Access Control and WPA/WPA2/WPA3/EAP authentication.

 

Update the shared secret on the RADIUS server

Rotate RADIUS secrets used for wireless authentication and Remote MAC Access Control. This should be done in coordination with the change on the RADIUS server to minimize disruption. Refer to the following resources for more information:

RADIUS

Reset the RADIUS server shared secrets used on wireless-type Zone objects.

 

Update the shared secret on the RADIUS clients and LDAP password on the LDAP server

Rotate RADIUS secrets and LDAP Identity password in the “Local RADIUS Server” feature in Wireless-type Zone objects. This should be done in coordination with the change on RADIUS clients and the LDAP server. Refer to the SonicOS 7.0 Admin Guide (About Local RADIUS Servers) for more information.

Guest Services

Reset the shared secret used by the Guest Services External Guest Authentication feature, if Message Authentication is enabled.

 

Update the shared secret on the web server

Rotate secrets for guest authentication services if Message Authentication is enabled. This should be done in coordination with the change on the web server that is integrated for External Guest Authentication. Refer to the following KB articles and Admin Guide links for more information:

SSO

Reset shared secrets used by SSO features such as SSO Agent, Terminal Services Agent (TSA), SSO RADIUS Accounting clients, 3rd Party SSO API.

 

Update the shared secret on each SSO/TSA server, RA client, and 3rd party SSO API client

Update secrets across all SSO components. This should be done in coordination with the change on each SSO Agent, Terminal Services Agent, RADIUS Accounting Client, and/or 3rd party SSO API client. Refer to the following KB articles for more information:

Accounting

Reset RADIUS/TACACS+ shared secrets used for Accounting server entries.

 

Update the shared secret on the RADIUS/TACACS+ server(s)

Update authentication secrets for accounting servers. This should be done in coordination with the change on the RADIUS/TACACS+ server(s). Refer to the following resources for more information:

SMTP/POP Appflow

Reset the password for the SMTP/POP email account used for AppFlow SFR report emails.

 

Update password with email provider

Update credentials for AppFlow SFR email reporting. This should be done in coordination with the change at the email provider. Refer to the SonicOS 7.0 Admin Guide (SFR Mailing) for more information.

NTP

Reset the password for any custom NTP servers.

 

Update password on NTP server(s)

Update authentication credentials for custom NTP servers. This should be done in coordination with the change on the NTP server(s). Refer to this KB article and the SonicOS 7.0 Admin Guide (Editing an NTP Server Entry) for more information.

Signature Proxy

Reset the password for the proxy server used to download signature updates.

 

Update password on the proxy server

Rotate the password for the proxy server used to download SonicWall signature updates. This should be done in coordination with the change on the proxy server to minimize disruptions to signature downloads. Refer to the KB titled Signature Downloads Through a Proxy Server for more information.

SSLVPN

Reset password in all SSLVPN Bookmarks

 

 

Reset the password associated with each SSLVPN Bookmark created by any user. Refer to the SonicOS 7 Admin Guide for more information.

GMS - Legacy

Update the GMS management encryption keys. Applicable when using “IPSec Management Tunnel” for GMS management.

 

Update keys in GMS

Update GMS management tunnel encryption keys. Only applicable when the management mode is set to IPSec Management Tunnel. Resources and brief steps are available in the remediation instructions.

Follow the instructions to create a new certificate.

 

 

 

Replace the re-signing CA in Firewall, download the new CA, push trust to clients, and then decommission the old CA. 

 

SonicWall provides an online tool to assist in identifying services listed above that require remediation action. Follow the instructions provided in the tool here. (Note UPE Mode is not supported) 

To manually review a Remediation Playbook is also available with provides a checklist of IF/THEN actions covering the table above in detail. 

Detailed Remediation Steps

Users

 

Reset any passwords and TOTP that are saved on the firewall, including the following, as applicable.

Local Users - including accounts with (SonicOS) admin privileges.
 

Below are the brief steps. Refer to the KB articles above for screenshots and more information.

 

  1. Log into the SonicWall appliance, navigate to Device | Users | Local Users & Groups.
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  2. Reset the password and remove the TOTP binding from each user.
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LDAP, TACACS+ and RADIUS servers – including any configured for SSO, Wireless interface and WLAN zone

Below are the brief steps. Refer to the above resources for more information.

 

  1. Update the LDAP bind account password and/or RADIUS/TACACS+ shared secret on the LDAP, RADIUS, or TACACS server(s).
  2. Navigate to DEVICE | Users | Settings.
    Image 

 

  1. Click the Configure button for LDAP, RADIUS, or TACACS+ (whichever applies to your environment).
     
LDAP Authentication
  1. On the LDAP Servers tab, edit each Primary and Secondary LDAP server entries and update the password.
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  1. Replica/Backup entries do not have a configurable password.
  2. On the LDAP Relay tab, update the RADIUS shared secret if this feature is enabled/in use. Refer to the SonicOS 7.0 Admin Guide (LDAP Relay) for more info.
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RADIUS Authentication

  1. On the Settings/RADIUS Servers tab, edit each RADIUS server entry and update the shared key.
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TACACS+ Authentication
  1. On the Settings/TACACS Servers tab, edit each RADIUS server entry and update the shared key.
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IPSec VPN

IPSec VPN pre-shared keys – including, if applicable, those used for GMS

Below are the brief steps. Refer to the above resources for more information.

Note: The shared secrets must be updated on both sides/IPSec Gateways of the VPN tunnel.

  1. Navigate to NETWORK | IPSec VPN | Rules and Settings.
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  2. Edit each policy and update the shared secret. Click Save. The shared secret will need to be updated on the remote IPSec Gateway.
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  1. Update the encryption keys for the GMS IPSec Management Tunnel Mode, if applicable.
    1. Navigate to DEVICE | Settings | Administration.
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  1. Click Configure under the Advanced Management section. Update the encryption keys. Click OK.
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  2. Refer to the SonicOS 7.0 Admin Guide (Enabling GMS Management) for more information.
     

Network Interfaces/WAN Connectivity

Interface L2TP/PPPoE/PPTP password(s) and WWAN

Below are the brief steps. Refer to the above resources for more information.

  1. Update your L2TP/PPPoE/PPTP password with your provider.
  2. Navigate to Network | System | Interfaces.
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  1. Edit the WAN or WWAN interface. Update the password and click OK.
  2. If you use cellular WWAN with SonicWall Access Points, navigate to DEVICE | Access Points | Settings.
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  1. Edit each applicable Access Point Provisioning Profile. On the 3G/4G/LTE WWAN tab, update the password. Click OK.
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Wireless

Wireless - Wi-Fi WAP/WAP2/WPA3/EAP pre-shared keys

  1. Pre-shared keys can be configured for SonicWall internal wireless, SonicPoint/SonicWave Access Points, and Virtual Access Points. Refer to the following resources for more information.

Advanced Management

SNMP - SNMP Engine ID

  1. Navigate to DEVICE | Settings | SNMP | User/Group.
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  1. Expand the default “* No Group *” entry and any custom groups. Edit each user entry and update its password. Click OK. Refer to the following resources for more information:
    1. Configuring SNMPv3 Engine IDs in SonicOSX
    2. Configuring SNMPv3 in SonicOS (5.9/6.1 & above)
    3. SonicOS 7.0 Admin Guide (Configuring SNMPv3 Engine IDs)

Cloud Secure Edge connector

  1. Go to MySonicWall, locate the firewall connector, and Remove Association
    1. Log in to MySonicWall
    2. Go to the Products page and select the Tenant from the drop-down menu to which your device is registered.
    3. If you have the serial number and do not remember the Tenant, please select “All Tenants” from the drop down and search for the serial number to identify the Tenant Name.
      Image
    4. Once you have the Tenant, you can follow step (b) above to list all products under the Tenant.
    5. This will list all the products in this tenant.
    6. Select the serial number for the product name: SonicWall Cloud Secure Edge.
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    7. Under the Product Details page, you can select the “Firewall Connection” link under “Associated Products” section.
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    8. This will list all the connectors linked to this Cloud Secure Edge tenant.
    9. Click on the trash icon against the connector you would like to dissociate.
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  2. Wait 10 minutes.
  3. Go to firewall. Toggle Enable Cloud Secure Edge Connectivity to Off. Click on Accept.
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  4. Toggle Enable Cloud Secure Edge Connectivity to On. Click on Accept.

Advanced Routing

NOTE: Not all auth tokens used in the advanced routing configuration are encrypted in the firewall configuration file. Therefore, it is imperative that you rotate the credentials used in advanced routing where possible.

Update the passwords associated with any advanced routing configuration. This should be done in coordination with the changes on the peer devices to minimize disruption. Refer to the following resources for more information:

DPI-SSL  

When DPI SSL is enabled and a threat actor gains access to the local network, it may be possible to use information contained in a DPI-SSL parameter to implement MITM attack on connections handled by DPI-SSL module.  

Therefore the following remediation steps are required 

  1. Log into the firewall and access the internal setting page. 

  1. Disable the “Use 2048 bit length spoof cert key in DPI-SSL" as show below 
    Group 1, Grouped object

  2. You will need to click “Accept” at the top of the “internal settings page” after which you will be prompted to reboot as below. Click “Restart Now” 

  3. When the firewall has completed a reboot cycle, log into the firewall and access the internal setting page. 
  4. You will then need to re-enable the “Use 2048 bit length spoof cert key in DPI-SSL" as shown above. 
  5. Again you will need to click the “Accept” at the top of the “internal settings page” after which you will be prompted. Click “Restart Now”. 

Creating New Golden Image Backup/Re-export Preferences

Re-export the preferences file and create a new system backup

SonicWall recommends exporting a new preferences file and creating a new system backup after reconfiguring all relevant credentials. Store the preferences file locally for safekeeping. Below are the brief steps. Refer to the KB titled How can I save a backup settings file from a SonicWall firewall? for more information.

  1. Navigate to DEVICE | Settings | Firmware and Settings
  2. Click Import/Export Configuration. Click Export Configuration. Click Export on the Export Configuration overlay. Save the file locally.
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Monitoring using SonicOS Web UI

Logging

Review logs and recent configuration changes for unusual activity

  1. Navigate to MONITOR | Logs | System Logs.
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  1. Use the available filters to review the events. Optionally, export the log to CSV for additional filtering within your spreadsheet application of choice.
    1. Filtering SonicWall event logs in SonicOS
    2. Modifying the log settings and levels
    3. SonicOS 7.0 Admin Guide (System Logs)
    4. Monitoring SSLVPN User Logins
    5. Configure Syslog to increase logging window

 

  1. Navigate to MONITOR | Logs | Auditing Logs.
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  1. Review the log for unusual or unexpected changes.
    1. Optionally, export the log to CSV format for additional filtering within a spreadsheet application.

Monitoring using NSM 

Monitoring using NSM requires that the Firewall have an NSM Advanced license. The logs will be available based on the NSM Advanced log retention days of 7, 30, 90, or 365 days 

NSM Manager View 

In the NSM Manager view, System Logs are aggregated from all firewalls managed in the tenant for a maximum of the last 30 days and limited to the last 8000 records. 

Logging 

Review logs and recent configuration changes for unusual activity 

  1. Navigate to MONITOR | Logs | System Logs 

  1. Use the available filters to review the events. Optionally, export the log to CSV for additional filtering within your spreadsheet application of choice. 

  1. Filter SonicWall event logs from firewalls in NSM 

 

 

e.g. Filtering based on Category 

A screenshot of a computerAI-generated content may be incorrect.

  1. Modifying the log settings and levels 

Templates can be used to modify the log settings and levels for more than one firewall.  

  • Navigate to Home | Templates  

  • Create a new Template 

A screenshot of a computerAI-generated content may be incorrect. 

 

  • Navigate to Device | Log | Settings 

  • Change the log settings and levels for each event type 

A screenshot of a computerAI-generated content may be incorrect. 

  • Apply the Template to firewalls 

A screenshot of a testAI-generated content may be incorrect. 

  • Commit and deploy the changes 

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  1. Monitoring SSL VPN User Logins 

  1. Navigate to Monitor | VPN Activity Report | Dashboard 

  1. The dashboard provides a comprehensive view of all SSL VPN activities. 

  1. Navigate to Monitor | VPN Activity Report | Users for details on VPN Users. 

  1. Navigate to Monitor | VPN Activity Report | VPN Logs for all SSL VPN related logs 

A screenshot of a computerAI-generated content may be incorrect. 

  1. Review the log for unusual or unexpected changes. Optionally, export the log to CSV format for additional filtering within a spreadsheet application. 

 

NSM Firewall View 

In the NSM Firewall view of a firewall, System Logs are available per the NSM license applied to the firewall and limited to the last 8000 records. For example, if the firewall has a 7-day Advanced license, the system events will be available for the last 7 days. 

The NSM Firewall view is identical to the SonicOS WebUI. To view and modify system logs and system event configurations, follow the steps in the section: 

“Monitoring using SonicOS Web UI” 

 
To launch NSM Firewall View, navigate to Home | Firewalls | Inventory.  Click on the firewall’s friendly name to launch the firewall’s Firewall View. 

A screenshot of a computerAI-generated content may be incorrect. 

A screenshot of a computerAI-generated content may be incorrect. 

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