Main Menu
  • COMPANY
    • Boundless Cybersecurity
    • Press Releases
    • News
    • Awards
    • Leadership
    • Press Kit
    • Careers
  • PROMOTIONS
    • Customer Loyalty Program
  • MANAGED SERVICES
    • Managed Security Services
    • Security as a Service
    • Professional Services
SonicWall
  • Products
    • Network Security
      • Next Generation FirewallNext-generation firewall for SMB, Enterprise, and Government
      • Security ServicesComprehensive security for your network security solution
      • Network Security ManagerModern Security Management for today’s security landscape
    • Advanced Threat Protection
      • Capture ATPMulti-engine advanced threat detection
      • Capture Security applianceAdvanced Threat Protection for modern threat landscape
    • Access Security
      • Cloud Edge Secure AccessDeploy Zero-Trust Security in minutes
      • Secure Mobile AccessRemote, best-in-class, secure access
      • Wireless Access PointsEasy to manage, fast and secure Wi-FI
      • SwitchesHigh-speed network switching for business connectivity
    • Email Security
      • Email SecurityProtect against today’s advanced email threats
    • Cloud Security
      • Cloud App SecurityVisibility and security for Cloud Apps
      • Cloud Firewall (NSv)Next-generation firewall capabilities in the cloud
    • Endpoint Security
      • Capture ClientStop advanced threats and rollback the damage caused by malware
      • Content Filtering ClientControl access to unwanted and unsecure web content
    • Product Widgets
      • Product Menu Right Image
      • Capture Cloud Platform
        Capture Cloud Platform

        A security ecosystem to harness the power of the cloud

    • Button Widgets
      • Products A-Z
        all products A–Z FREE TRIALS
  • Solutions
    • Industries
      • Distributed Enterprises
      • Retail & Hospitality
      • K-12 Education
      • Higher Education
      • State & Local
      • Federal
      • Healthcare
      • Financial Services
      • Carriers
    • Use Cases
      • Secure SD-Branch
      • Network Segmentation
      • Zero Trust Security
      • Secure SD-WAN
      • Office 365 Security
      • SaaS Security
      • Secure WiFi
    • Solutions Widgets
      • Solutions Content Widgets
        Federal

        Protect Federal Agencies and Networks with scalable, purpose-built cybersecurity solutions

      • Solutions Image Widgets
  • Partners
    • SonicWall Partners
      • Partners Overview
      • Find a Partner
      • Authorized Distributors
      • Technology Partners
    • Partner Resources
      • Become a Partner
      • SonicWall University
      • Training & Certification
    • Partner Widgets
      • Custom HTML : Partners Content WIdgets
        Partner Portal

        Access to deal registration, MDF, sales and marketing tools, training and more

      • Partners Image Widgets
  • Support
    • Support
      • Support Portal
      • Knowledge Base
      • Technical Documentation
      • Community
      • Video Tutorials
      • Product Life Cycle Tables
      • Partner Enabled Services
      • Contact Support
    • Resources
      • Resource Center
      • Free Trials
      • Blog
      • SonicWall University
      • MySonicWall
    • Capture Labs
      • Capture Labs
      • Security Center
      • Security News
      • PSIRT
      • Application Catalog
    • Support Widget
      • Custom HTML : Support Content WIdgets
        Support Portal

        Find answers to your questions by searching across our knowledge base, community, technical documentation and video tutorials

      • Support Image Widgets
  • COMPANY
    • Boundless Cybersecurity
    • Press Releases
    • News
    • Awards
    • Leadership
    • Press Kit
    • Careers
  • PROMOTIONS
    • Customer Loyalty Program
  • MANAGED SERVICES
    • Managed Security Services
    • Security as a Service
    • Professional Services
  • Contact Sales
  • English English English en
  • BLOG
  • CONTACT SALES
  • FREE TRIALS
  • English English English en
SonicWall
  • Products
    • Network Security
      • Next Generation FirewallNext-generation firewall for SMB, Enterprise, and Government
      • Security ServicesComprehensive security for your network security solution
      • Network Security ManagerModern Security Management for today’s security landscape
    • Advanced Threat Protection
      • Capture ATPMulti-engine advanced threat detection
      • Capture Security applianceAdvanced Threat Protection for modern threat landscape
    • Access Security
      • Cloud Edge Secure AccessDeploy Zero-Trust Security in minutes
      • Secure Mobile AccessRemote, best-in-class, secure access
      • Wireless Access PointsEasy to manage, fast and secure Wi-FI
      • SwitchesHigh-speed network switching for business connectivity
    • Email Security
      • Email SecurityProtect against today’s advanced email threats
    • Cloud Security
      • Cloud App SecurityVisibility and security for Cloud Apps
      • Cloud Firewall (NSv)Next-generation firewall capabilities in the cloud
    • Endpoint Security
      • Capture ClientStop advanced threats and rollback the damage caused by malware
      • Content Filtering ClientControl access to unwanted and unsecure web content
    • Product Widgets
      • Product Menu Right Image
      • Capture Cloud Platform
        Capture Cloud Platform

        A security ecosystem to harness the power of the cloud

    • Button Widgets
      • Products A-Z
        all products A–Z FREE TRIALS
  • Solutions
    • Industries
      • Distributed Enterprises
      • Retail & Hospitality
      • K-12 Education
      • Higher Education
      • State & Local
      • Federal
      • Healthcare
      • Financial Services
      • Carriers
    • Use Cases
      • Secure SD-Branch
      • Network Segmentation
      • Zero Trust Security
      • Secure SD-WAN
      • Office 365 Security
      • SaaS Security
      • Secure WiFi
    • Solutions Widgets
      • Solutions Content Widgets
        Federal

        Protect Federal Agencies and Networks with scalable, purpose-built cybersecurity solutions

      • Solutions Image Widgets
  • Partners
    • SonicWall Partners
      • Partners Overview
      • Find a Partner
      • Authorized Distributors
      • Technology Partners
    • Partner Resources
      • Become a Partner
      • SonicWall University
      • Training & Certification
    • Partner Widgets
      • Custom HTML : Partners Content WIdgets
        Partner Portal

        Access to deal registration, MDF, sales and marketing tools, training and more

      • Partners Image Widgets
  • Support
    • Support
      • Support Portal
      • Knowledge Base
      • Technical Documentation
      • Community
      • Video Tutorials
      • Product Life Cycle Tables
      • Partner Enabled Services
      • Contact Support
    • Resources
      • Resource Center
      • Free Trials
      • Blog
      • SonicWall University
      • MySonicWall
    • Capture Labs
      • Capture Labs
      • Security Center
      • Security News
      • PSIRT
      • Application Catalog
    • Support Widget
      • Custom HTML : Support Content WIdgets
        Support Portal

        Find answers to your questions by searching across our knowledge base, community, technical documentation and video tutorials

      • Support Image Widgets
  • COMPANY
    • Boundless Cybersecurity
    • Press Releases
    • News
    • Awards
    • Leadership
    • Press Kit
    • Careers
  • PROMOTIONS
    • Customer Loyalty Program
  • MANAGED SERVICES
    • Managed Security Services
    • Security as a Service
    • Professional Services
  • Contact Sales
  • Menu

Issues with Connectivity to a Cable Modem

10/14/2021 1,200 People found this article helpful 122,443 Views

    Download
    Print
    Share
    • LinkedIn
    • Twitter
    • Facebook
    • Email
    • Copy URL The link has been copied to clipboard

    Description

    Issues with Connectivity to a Cable Modem

    Resolution

    Resolution for SonicOS 6.5

    This release includes significant user interface changes and many new features that are different from the SonicOS 6.2 and earlier firmware. The below resolution is for customers using SonicOS 6.5 firmware.

     

     

     

    Issues with Connectivity to a Cable Modem

    This is only if you’re having issues with the SonicWall acquiring an IP or connectivity when using a cable ISP.

    If your ISP is setup for DHCP, plug a computer into the cable modem and pull DHCP.  Do an Ipconfig on the laptop and record all the information the laptop pulled.  Then unplug the modem, including the coaxial cable and let it sit there for 15 – 30 minutes.  While the modem is unplugged configure the SonicWall as a static IP with the information pulled from the laptop.  Then once this is done unplug the SonicWall.

    Plug the cable modem in, power 1st then coaxial.  Once the device is 100% up connect the SonicWall to the modem and turn on. Test connectivity.  If you have connectivity, go ahead and change the WAN as DHCP. 

     If your ISP is setup for static, unplug the cable modem, coaxial and power for 30 minutes (this is to ensure the ARP cache at the cable company’s end is flushed).  While this device is down, configure the SonicWall’s WAN IP according to the ISP’s information they provided to you.  Once the SonicWall is configured unplug the SonicWall.  Once ½ hour has passed plug the cable modem in, power 1st then coaxial.  Once the device is 100% up connect the SonicWall to the modem and turn on. Test connectivity. 

    Lastly you can copy MAC address of the laptop and spoof it on the WAN port.

    On Standard you would do this by going to Manage | Network | Settings. Open the edit screen for the WAN interface and go to the advanced tab. You can mention that on the Override MAC address field. 

    Image

    *Note:

    When testing connectivity from the SonicWall go to Investigate |System Diagnostics | Diagnostic tools pull down to ping. 

    Ping an IP outside of the network and ping google.com this will test DNS versus connectivity issues.

     

    Image

     

     

     

    Resolution for SonicOS 6.2 and Below

    The below resolution is for customers using SonicOS 6.2 and earlier firmware. For firewalls that are generation 6 and newer we suggest to upgrade to the latest general release of SonicOS 6.5 firmware.

     

     

     

     

     

    Issues with Connectivity to a Cable Modem

    This is only if you’re having issues with the SonicWall acquiring an IP or connectivity when using a cable ISP.

    If your ISP is setup for DHCP, plug a computer into the cable modem and pull DHCP.  Do an Ipconfig on the laptop and record all the information the laptop pulled.  Then unplug the modem, including the coaxial cable and let it sit there for 15 – 30 minutes.  While the modem is unplugged configure the SonicWall as a static IP with the information pulled from the laptop.  Then once this is done unplug the SonicWall.

    Plug the cable modem in, power 1st then coaxial.  Once the device is 100% up connect the SonicWall to the modem and turn on. Test connectivity.  If you have connectivity, go ahead and change the WAN as DHCP. 

     If your ISP is setup for static, unplug the cable modem, coaxial and power for 30 minutes (this is to ensure the ARP cache at the cable company’s end is flushed).  While this device is down, configure the SonicWall’s WAN IP according to the ISP’s information they provided to you.  Once the SonicWall is configured unplug the SonicWall.  Once ½ hour has passed plug the cable modem in, power 1st then coaxial.  Once the device is 100% up connect the SonicWall to the modem and turn on. Test connectivity. 

    Lastly you can copy MAC address of the laptop and spoof it on the WAN port.

    On the management interface, you would do this by going to Network | Interfaces . Open the edit screen for the WAN interface and go to the advanced tab. You can mention that on the Override MAC address field. 

    Image

     

     

    *Note:

    When testing connectivity from the SonicWall go to System | Diagnostics | Diagnostic tools pull down to ping. 

    Ping an IP outside of the network and ping google.com this will test DNS versus connectivity issues.

    Image

     

    Related Articles

    • Configuring and troubleshooting SonicWALL Switches
    • How can I get alerted if a WAN link goes down in a WAN fail-over scenario?
    • Configuring and troubleshooting High Availability

    Categories

    • Firewalls > SonicWall NSA Series > Networking
    • Firewalls > SonicWall SuperMassive 9000 Series > Networking
    • Firewalls > SonicWall SuperMassive E10000 Series > Networking
    • Firewalls > TZ Series > Networking

    Not Finding Your Answers?

    ASK THE COMMUNITY

    Was This Article Helpful?

    YESNO

    Article Helpful Form

    Article Not Helpful Form

    Company
    • Careers
    • News
    • Leadership
    • Awards
    • Press Kit
    • Contact Us
    Popular resources
    • Communities
    • Blog
    • SonicWall Capture Labs

    Stay In Touch

    • By submitting this form, you agree to our Terms of Use and acknowledge our Privacy Statement. You can unsubscribe at any time from the Preference Center.
    • This field is for validation purposes and should be left unchanged.
    • Facebook
    • Twitter
    • Linkedin
    • Youtube
    • Instagram

    © 2022 SonicWall. All Rights Reserved.

    • Legal
    • Privacy
    • English
      Scroll to top
      Trace:dd05288e52973a5809ba22c373a5ba22-70