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9 ways to Fix WAN Connection Error – Best Guide

A Wide Area Network (WAN) is critical component of an organization’s network infrastructure. A WAN connection error can cause significant disruption in business operations, leading to lost productivity and revenue.

Understanding WAN Connection Error

Wide Area Network (WAN) connection errors occur when modem or router is unable to establish connection to internet. A WAN is network that spans large geographic area, typically consisting of multiple local area networks (LANs) connected over long distance. WANs are used to connect devices and networks that are geographically dispersed, such as offices in different locations.

When a WAN connection error occurs, all devices connected to network lose internet connectivity, which result in lost productivity and frustration. Understanding causes of WAN connection errors and how to troubleshoot is essential for restoring connectivity to network.

WAN connection errors can be caused by physical connection issues, network configuration errors, firewall settings, firmware issues, MTU size issues, ISP issues, and VPN issues. Troubleshooting WAN connection errors involves checking physical connections, restarting devices, checking network configuration, updating firmware, adjusting firewall settings, changing MTU size, checking ISP, using VPN, or resetting devices. The appropriate troubleshooting method will depend on specific cause of error.

By understanding nature of WAN connection errors and their causes, you can take necessary steps to troubleshoot and prevent them from occurring in future. Maintaining a reliable and secure WAN connection is critical for ensuring smooth functioning of your business or organization.

How to Fix WAN Connection Error

To troubleshoot a WAN connection error, you need to identify specific cause of problem. Common troubleshooting methods include checking physical connections, restarting devices, checking network configuration, updating firmware, adjusting firewall settings, changing MTU size, checking ISP, using VPN, or resetting devices. The appropriate method will depend on underlying cause of error. By systematically testing and ruling out possible causes, you can determine the root cause of error and take necessary steps to restore connectivity to your network.

Check Physical Connections

Step1 : ensure all cables are securely connected to appropriate ports and devices.

Step2 : Verify modem and router are powered on and functioning correctly.

Step3 : If any cables are loose or damaged, replace immediately.

First step in troubleshooting WAN connection error is to check physical connections. Ensure all cables are securely connected to appropriate ports and devices. Verify modem and router are powered on and functioning correctly. If any cables are loose / damaged, replace immediately.

Restart Devices

1: Turn off modem and router.

2: Wait for 30 seconds.

3: Turn modem and router back on.

If checking physical connections does not resolve WAN connection error, try restarting devices. Turn off modem and router, wait for 30 seconds, and then turn them back on. This process can help clear any temporary glitches that may be causing the error.

Check Network Configuration

Step 1: Access router’s configuration page through web browser.

Step 2: Verify IP address, subnet mask, default gateway, and DNS settings.

Step 3: Compare settings to recommended settings provided by Internet Service Provider (ISP).

Step 4: If any of settings are incorrect, update them accordingly.

Ensure that network configuration settings are correct. Check the IP address, subnet mask, default gateway, and DNS settings. If any of these settings are incorrect, the WAN connection error may occur. To verify the settings, access router’s configuration page through web browser and compare settings to recommended settings provided by Internet Service Provider (ISP).

Update Firmware

Step1 : Check for any available firmware updates for modem and router.

Step2 : Download and install latest firmware updates.

Outdated firmware can cause WAN connection errors. Check for any available firmware updates for modem and router and update if available. given Process can fix bugs or issues causing error.

Disable Firewall

Step1 : Temporarily disable firewall.

Step2 : Check if WAN connection error is resolved.

Step3 : If error resolved, adjust firewall settings to allow WAN connection.

Firewalls can sometimes block WAN connections, causing error. Temporarily disable the firewall and check if error persists. If error is resolved, adjust firewall settings to allow WAN connection.

Change MTU Size

Step 1: Access router’s configuration page through web browser.

Step 2: Locate MTU size setting.

Step 3: Change MTU size to recommended setting provided by ISP.

Step 4: If the error persists, try lower MTU size.

The Maximum Transmission Unit (MTU) size can affect the WAN connection. A smaller MTU size can lead to fragmented packets, causing the connection to slow down or fail. Change the MTU size to recommended setting provided by ISP or try lower setting to see if it resolves error.

Check ISP

Step 1: Contact ISP to ensure that there are no outages / maintenance work in progress.

Step 2: Ask ISP to run diagnostic test on connection to determine if there are any issues.

Sometimes, WAN connection errors occur due to issues with ISP. Check with ISP to ensure there are no outages / maintenance work in progress. Ask ISP to run diagnostic test on connection to determine if there is any issues.

Use VPN

Step1 : Download and install VPN client.

Step2 : Connect to WAN through VPN client.

Step3 : Check WAN connection error is resolved.

A Virtual Private Network (VPN) can help resolve WAN connection errors. A VPN can provide a secure connection and bypass any network restrictions or firewalls that may be causing error. Try connecting to WAN through VPN and see if the error is resolved.

Reset Devices

Step 1: Follow manufacturer’s instructions on how to reset device.

Step 2: Reconfigure device’s settings and configurations.

Step 3: If the error persists, contact the ISP for further assistance.

If none of above steps resolve WAN connection error, try resetting devices to their factory settings. This process will erase all current settings and configurations, including any customizations. Follow manufacturer’s instructions on how to reset device, and reconfigure settings.

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Common Causes of WAN Connection Errors

Physical Connection Issues: One of most common reasons for WAN connection errors is physical connection issues. If cables connecting modem and router are loose, damaged, or not plugged in correctly, it can result in connectivity issues.

Network Configuration Errors: Incorrect network configuration settings can also lead to WAN connection errors. For example, if IP address, subnet mask, default gateway, or DNS settings are not configured correctly, it can prevent modem from connecting to internet.

Firewall Settings: Firewall settings can also cause WAN connection errors. If firewall is blocking traffic from WAN / is not configured to allow traffic from WAN, it can result in connectivity issues.

Firmware Issues: Outdated firmware on modem or router can also cause WAN connection errors. Firmware updates are released periodically to fix bugs and improve performance of device. Failure to update firmware can lead to connectivity issues.

MTU Size: MTU size is maximum transmission unit size, which determines maximum size of packets that can be transmitted over network. If MTU size is too large / too small, it cause WAN connection errors.

ISP Issues: WAN connection errors can occur due to issues with internet service provider (ISP). Outages, maintenance work, or network congestion can prevent modem from connecting to internet.

VPN Issues: Using a virtual private network (VPN) can also cause WAN connection errors. VPNs create a secure tunnel between device and the internet, which can interfere with modem’s ability to connect to internet.

How to Prevent WAN Connection Errors

Ensure that all physical connections are secure and in good condition.
Keep network configurations up to date and properly configured.
Update firmware on modems and routers regularly to address bugs and vulnerabilities.
Adjust firewall settings to allow WAN traffic.
Use correct Maximum Transmission Unit (MTU) size.
Choose reliable Internet Service Provider (ISP) and ensure that your service plan is appropriate for needs.
Use a high-quality modem and router to ensure stable and reliable connectivity.
Regularly test your network for vulnerabilities and security risks.
Implement appropriate security protocols such as Virtual Private Network (VPN) to ensure secure remote access.

FAQ’s

What is WAN connection error?

A WAN connection error is issue that prevents modem or router from connecting to internet through wide area network (WAN). This can result in loss of internet connectivity for all devices connected to network.

What are common causes of WAN connection errors?

physical connection issues, network configuration errors, firewall settings, firmware issues, MTU size issues, ISP issues, and VPN issues.

How can I troubleshoot WAN connection error?

To troubleshoot a WAN connection error, you can check physical connections, restart devices, check network configuration, update firmware, disable firewall, change MTU size, check ISP, use VPN, or reset devices. Appropriate troubleshooting method will depend on the specific cause of the error.

How can I prevent WAN connection errors?

To prevent WAN connection errors, ensure that all physical connections are secure and in good condition, keep network configurations up to date, update firmware regularly, adjust firewall settings to allow WAN traffic, and use correct MTU size. You can also choose reliable ISP and use high-quality modem and router.

Do I need to contact my ISP if I am experiencing WAN connection error?

If troubleshooting methods do not resolve issue, you may need to contact your ISP to investigate cause of the error. The ISP can run diagnostic tests and provide support to resolve issue.

Conclusion

WAN connection errors can be frustrating and disruptive. However, by following above steps, can troubleshoot and resolve error. Always ensure you have correct configuration settings and firmware updates for devices. If error persists, contact your ISP for further assistance. Stable WAN connection is essential for business operations and productivity.

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