Understanding Strange Source Destination IP Address Entries in Win10 Firewall Log

In this article, we will delve into the world of Windows 10 Firewall logs, specifically focusing on understanding strange source and destination IP address entries. We will cover key concepts, provide context, and offer solutions to common concerns.

What are Source and Destination IP Addresses?

In computer networking, an IP (Internet Protocol) address is a unique identifier for devices on a network. The source IP address is the address of the device sending a packet, while the destination IP address is the address of the device receiving the packet. Understanding these addresses is crucial for network troubleshooting and security.

Strange Source Destination IP Address Entries in Win 10 Firewall Log

When reviewing Windows 10 Firewall logs, you may encounter strange source and destination IP addresses. These can be caused by various factors, such as misconfigured network settings or malicious activities. Let's explore some possible scenarios:

Question: Will a computer's IP (e.g. 192.168.1.69) appear as the source IP in its firewall log for packets sent?

Yes, a computer's IP address will appear as the source IP in its firewall log when packets are sent. However, if you see other source IP addresses, it could indicate a problem.

Question: Should I be concerned if my router is receiving a lot of random DoS attacks?

If your router is constantly receiving random Denial of Service (DoS) attacks, it's a sign of a security issue. We recommend taking the following steps:

1. Update your router's firmware
2. Change the default admin credentials
3. Use a strong, unique network name (SSID)
4. Enable and configure your router's firewall
5. Consider using a VPN or other security measures

Interpreting Win 10 Firewall Logs

To interpret strange source and destination IP addresses in your Windows 10 Firewall log, follow these steps:

1. Open the Event Viewer (eventvwr.msc)
2. Navigate to "Windows Logs" > "Security"
3. Look for Firewall events (filter by "Microsoft-Windows-Firewall" provider)
4. Check the "Action" field for allowed or blocked packets
5. Examine the "Source IP Address" and "Destination IP Address" fields

Understanding strange source and destination IP addresses in your Windows 10 Firewall log is essential for maintaining network security and troubleshooting. By following the steps outlined in this article, you can interpret your firewall log, identify potential issues, and take appropriate action.

References

• Book: "Windows Server 2016 Networking and Security" by Mitch Tulloch and Michael Noel
• Article: "How to Read Windows Firewall Logs" by LifeWire (https://www.lifewire.com/read-windows-firewall-logs-818122)
• Online Resource: "Windows Firewall Logs" by Microsoft (https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-firewall/windows-firewall-log)