What should I do if there are vnc too many security failures in the connection?
Why is my VNC connection failing? What's the reason of so many security errors? I was surfing the internet and came across the VNC website that said - VNC® Connect is the latest version of our remote access software for personal and commercial use. It consists of a VNC® Server app for the computer you want to control, which must be licensed, and a VNC® Viewer app that you are free to download to all the devices you want to control from.
The information at this link for vnc too many security failure - https://help.realvnc.com/hc/en-us suggests to me that it was an attempt at intrusion. To succeed in establishing a VNC session a legitimate user must wait. In practice waiting a few minutes is necessary before a successful VNC session is allowed once again. There is no need to re-establish the ssh tunnel.
Answer (1)
If you encounter the "Too many security failures" message when trying to connect to a VNC server, it usually indicates that there have been multiple failed attempts to authenticate with the server. Here are some steps you can take to resolve this issue:
1. Wait for the Lockout to Expire
Some VNC servers impose a temporary lockout after a certain number of failed authentication attempts. Waiting for a while (usually a few minutes) can sometimes resolve the issue.
2. Restart the VNC Server
Restarting the VNC server can reset the failed attempt counter. The method to restart the VNC server depends on the specific server software and the operating system you are using.
On Linux (example for TigerVNC):sudo systemctl restart vncserver@
On Windows:
Open the Services management console (services.msc), locate the VNC server service, and restart it.
3. Check VNC Server Configuration
Ensure that the VNC server is configured to allow connections from your client. Check the authentication settings and make sure the correct password is set.
4. Clear Authentication Failures on the VNC Client
If your VNC client has cached failed authentication attempts, clearing this cache might help. Restarting the client application can sometimes resolve this.
5. Update VNC Software
Ensure that both the VNC server and client software are up to date. Sometimes, updates include fixes for issues related to security and authentication.
6. Verify Network and Firewall Settings
Ensure that there are no network issues or firewall settings that might be causing problems with the connection.
7. Check for IP Restrictions
Some VNC servers can be configured to block connections from certain IP addresses after multiple failed attempts. Check the server settings to ensure your IP is not blocked.
Example Scenario on Linux with TigerVNC:
Assume you have TigerVNC server running on display number :1. To restart the server, you would run:
sudo systemctl restart vncserver@:1Example Scenario on Windows with TightVNC:Open the Services management console (services.msc). Find the "TightVNC Server" service.Right-click on it and select "Restart".Additional Steps for Persistent Issues:
Check Logs: Review the VNC server logs for more details on the authentication failures. This can give you insight into what might be causing the issue.
Change Password: Consider changing the VNC server password to ensure that there are no issues with the current password.
By following these steps, you should be able to resolve the "Too many security failures" issue and establish a successful connection to your VNC server.