Masscan: Could not determine default gateway – нет информации о шлюзе.

When using masscan tool for network scanning, you may encounter an issue where the default gateway information cannot be determined. This can be a frustrating situation, especially when trying to scan specific parts of a network. In this article, we will explore why this issue may occur and how to troubleshoot it.

Reasons for Missing Gateway Information

• Incorrect network configuration
• Network connectivity issues
• Firewall restrictions

One common reason for masscan failing to determine the default gateway is due to incorrect network configuration. Ensure that your network settings are properly configured and that the gateway address is correctly set.

Network connectivity issues can also prevent masscan from identifying the default gateway. Check your network connection and make sure that you have internet access before running the scan.

Firewall restrictions may also play a role in hiding gateway information from masscan. If your firewall is blocking certain traffic or ports, it may be preventing the tool from accessing the necessary gateway information.

Troubleshooting Steps

1. Check network configuration settings
2. Verify network connectivity
3. Review firewall rules

Start by verifying that your network configuration settings are accurate. Double-check the gateway address and subnet mask to ensure they are correct.

Next, confirm that your device has a stable network connection. Troubleshoot any connectivity issues before running masscan to prevent any potential disruptions in the scan.

If you suspect that firewall restrictions are causing the issue, review your firewall rules and make any necessary adjustments to allow masscan to function properly.

Conclusion

In conclusion, when masscan cannot determine the default gateway, it may be due to network configuration errors, connectivity issues, or firewall restrictions. By following the troubleshooting steps outlined in this article, you can address the issue and successfully run network scans using masscan.