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55 lines
2.6 KiB
Markdown
55 lines
2.6 KiB
Markdown
---
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title: Configure the Windows Defender Firewall Log (Windows 10)
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description: Configure the Windows Defender Firewall Log
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ms.assetid: f037113d-506b-44d3-b9c0-0b79d03e7d18
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ms.prod: w10
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ms.mktglfcycl: deploy
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ms.sitesec: library
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ms.pagetype: security
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author: brianlic-msft
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ms.date: 08/17/2017
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---
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# Configure the Windows Defender Firewall with Advanced Security Log
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**Applies to**
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- Windows 10
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- Windows Server 2016
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To configure Windows Defender Firewall with Advanced Security to log dropped packets or successful connections, use the Windows Defender Firewall with Advanced Security node in the Group Policy Management MMC snap-in.
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**Administrative credentials**
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To complete these procedures, you must be a member of the Domain Administrators group, or otherwise be delegated permissions to modify the GPOs.
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In this topic:
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- [To configure the Windows Defender Firewall with Advanced Security log](#to-configure-the-windows-firewall-log)
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## To configure the Windows Defender Firewall with Advanced Security log
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1. Open the Group Policy Management Console to [Windows Defender Firewall with Advanced Security](open-the-group-policy-management-console-to-windows-firewall-with-advanced-security.md).
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2. In the details pane, in the **Overview** section, click **Windows Defender Firewall Properties**.
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3. For each network location type (Domain, Private, Public), perform the following steps.
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1. Click the tab that corresponds to the network location type.
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2. Under **Logging**, click **Customize**.
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3. The default path for the log is **%windir%\\system32\\logfiles\\firewall\\pfirewall.log**. If you want to change this, clear the **Not configured** check box and type the path to the new location, or click **Browse** to select a file location.
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>**Important:** The location you specify must have permissions assigned that permit the Windows Defender Firewall service to write to the log file.
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4. The default maximum file size for the log is 4,096 kilobytes (KB). If you want to change this, clear the **Not configured** check box, and type in the new size in KB, or use the up and down arrows to select a size. The file will not grow beyond this size; when the limit is reached, old log entries are deleted to make room for the newly created ones.
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5. No logging occurs until you set one of following two options:
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- To create a log entry when Windows Defender Firewall drops an incoming network packet, change **Log dropped packets** to **Yes**.
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- To create a log entry when Windows Defender Firewall allows an inbound connection, change **Log successful connections** to **Yes**.
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6. Click **OK** twice.
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