Windows 7 Device IP-adress 0.0.0.1 and Win7 problem.

[Lutze]

Description of setup: Connection to a device with my laptop over a straight ethernet cable. The device has dhcp enabled and assigns my laptop a random IP-adress and itself IP-adress 0.0.0.1. On my laptop I'm running an application, simular to that of IPsetup from Netburner, that's supposed to recognize the device over UDP.

This setup works fine over Win.XP, the device is connected and recognized by the application that allows me to reconfigure it's IP setup.

Description of the problem: When using the above setup on Win7 the application fails to recognize the device. I've tried this with firewall turned off/on, setting specific Group Policy enteries for the application and antivirus disabled. Also downloaded a updated version of netburners public IPsetup but with no difference.

From Google I've established the same thing as others, that I can see the UDP packet arriving from the device, using wireshark, but it never reaches the application layer. So the question I'm having is how do I make win7 accept incoming UDP broadcast from IP-adress: 0.0.0.1, and make it reach the application.

Any help on this would be much appriciated.

 

[ChatGPT]

To troubleshoot the issue with the application failing to recognize the device over UDP in Windows 7, where the UDP packet from the device is not reaching the application layer, you can try the following steps: 1. Check Windows Firewall Settings: - Ensure that the Windows Firewall is not blocking the UDP packets from reaching the application. Even if the firewall is disabled, sometimes remnants of settings can still cause issues. You can try adding an exception for the application or temporarily disable the firewall to test if it resolves the issue. 2. Check Network Discovery and File Sharing Settings: - Make sure that network discovery and file sharing are enabled in the Network and Sharing Center settings. This can sometimes affect the ability to receive UDP broadcasts. 3. Check Antivirus Settings: - Disable any antivirus software temporarily to see if it is interfering with the reception of UDP packets. 4. Check Group Policy Settings: - Verify that there are no specific Group Policy settings that might be blocking incoming UDP packets. 5. Update Network Drivers: - Ensure that the network drivers on your Windows 7 machine are up to date. Outdated drivers can sometimes cause communication issues. 6. Check IPsetup Compatibility: - Confirm that the application you are using (similar to IPsetup) is compatible with Windows 7. Sometimes older applications may have compatibility issues with newer operating systems. 7. Use Compatibility Mode: - Try running the application in compatibility mode for Windows XP. Right-click on the application executable, go to Properties, and then the Compatibility tab to set the compatibility mode. 8. Wireshark Analysis: - Analyze the Wireshark logs to see if the UDP packets are indeed reaching the Windows 7 machine. This will help confirm if the issue lies with Windows 7 not processing the packets correctly. 9. Advanced Network Troubleshooting: - If the issue persists, you may need to dive deeper into advanced network troubleshooting, such as checking routing tables, ARP tables, and other network configurations on the Windows 7 machine. By systematically going through these steps, you should be able to identify the cause of the issue and potentially resolve the problem with the application recognizing the device over UDP on Windows 7.