How to troubleshoot port assignment issue when activating license? – Support | JetBrains

Problem:

Encountering issues with license activation where an error states:

Problem description:Could not create an HTTP request handler to accept the authorization callback on any of these ports: 62,345-62,364. This can happen when the ports are used by other applications or there is another authorization process in progress.

Cause :

This error means that the IDE cannot start an http request handler on specified ports, where it will listen for server's answers.

Most common causes and solutions:

Other software is using the same ports
Antivirus/VPN/firewall settings prevent IDE from starting a listener on those ports.
System security settings prevent IDE from starting a listener on those ports.
IDE or user lack system permissions to listen to mentioned ports.
Windows reserves the range for Hyper-V, WSL2, Docker Desktop, or Virtualization-Based Security (VBS). In that case, netstat will not show a holder.
Windows Mobile hotspot is enabled and causes Can't login to JB Account when Mobile hotspot is enabled: 'Could not create an HTTP request handler'.

The port range (62345–62364) is fixed and cannot currently be changed. Making it configurable is tracked in Make the license-activation OAuth callback port range configurable.

Possible solutions

IDE and/or machine restart tend to do the trick in most cases.
Disable or reconfigure security applications/Firewall to allow connections to these ports.
Run the corresponding OS command to check if there is an existing process occupying the port. Note the PID (Process ID). Open Task Manager, go to the "Details" tab, and locate the process corresponding to the PID to identify the application.
```
#windows
netstat -ano | findstr /R "6234[5-9] 6235[0-9] 6236[0-4]"

# for *nix/macOS systems 
sudo lsof -i :62345-62364
```
On Windows, if netstat reports nothing but the bind still fails, check whether the range is reserved by the OS (Hyper-V, WSL2, Docker Desktop, VBS):
```
netsh int ipv4 show excludedportrange protocol=tcp
```
If 62345-62364 falls inside an excluded range, disable the relevant feature or shift the IDE's range via step 4 below, then reboot. Sysinternals TcpView can also surface holders that netstat misses.
Check the range for dynamic (ephemeral) TCP ports for IPv4 connections using the command prompt:
```
netsh int ipv4 show dynamicport tcp
```
Adjust the range if necessary. Reset the Windows Sockets (Winsock):
```
netsh int ipv4 set dynamicport tcp start=49152 num=16383
netsh winsock reset
```
Make sure Windows Setting App | Network & internet > Mobile hotspot is disabled.

For a durable workaround that avoids the callback port entirely, sign in to JetBrains Toolbox first, then launch the IDE from Toolbox (install it through Toolbox if you haven't already — an existing Toolbox install does not need reinstalling). Toolbox passes the auth token to the IDE, so no callback port is opened and this error cannot occur.
Collect IDE logs via Help | Collect Logs and Diagnostic Data. Lines like #LicenseManager - Authorization redirect handler startup: port=...; java.net.BindException in idea.log confirm which exact ports fail to bind and help further triage.
If the problem persists, try to reboot the system or try the offline activation method outlined in this article as a temporary solution.