Fix the OS error of localsend

Sep 30, 2024#生活笔记865

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Recently, I encountered a System.Net.Sockets.SocketException (10013) error while using localsend to send files, indicating a socket access issue. Initially, I thought it was a permissions problem and tried running it as an administrator, but that didn't help. After researching, I found that the issue was due to unavailable port numbers. To check which ports were excluded, I used the command: `netsh interface ipv4 show excludedportrange protocol=tcp`. I discovered two solutions to fix the problem: **Solution 1:** Change the port number in Localsend's advanced settings to one that isn't excluded. However, this may prevent other devices from detecting it. **Solution 2:** Restart the winnat service, which usually releases the ports. This requires running commands with administrator privileges: 1. `net stop winnat` 2. Check excluded ports again. 3. `net start winnat` 4. Check excluded ports again. This resolved the issue.

Recently, I used localsend to send files, but I encountered the error System.Net.Sockets.SocketException (10013): An attempt was made to access a socket in a way that is not allowed by its access permissions. I thought it was due to insufficient permissions, so I opened it with administrator privileges, but it didn't help.

After searching online, I found that the bug was caused by unavailable port numbers. First, let's check which ports are unavailable.

netsh interface ipv4 show excludedportrange protocol=tcp

Screenshot 2024-09-30 164944.png
Of course, the above image has already been fixed. There are mainly two solutions for the fix.

Solution 1#

Open the advanced settings of Localsend and change the port number to one that is not excluded. The downside is that other devices may not be able to scan it.

Screenshot 2024-09-30 165635.png

Method 2#

Turn off winnat and then turn it back on; this usually releases the ports. Remember to run with administrator privileges.

net stop winnat
netsh interface ipv4 show excludedportrange protocol=tcp
net start winnat
netsh interface ipv4 show excludedportrange protocol=tcp

Screenshot 2024-09-30 170241.png

Hey, it's working now.

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