netbeans IDE 8.1 "Unable to connect to the Plugin Portal because of Connection reset"

Question

Can't install any plugin in netbeans ide 8.1.

I get the following error:

Unable to connect to the Plugin Portal because of Connection reset

Check your proxy settings or try again later. The server may be unavailable at the moment. You may also want to make sure that your firewall is not blocking network traffic.

Or when run Check for updates:

Unable to connect to the Plugin Portal because of Connection reset

Already tried:

1. Turn off the fire wall
2. Add the option "-J-Djava.net.preferIPv4Stack=true" to the netbeans_default_options in "\NetBeans 8.1\etc\netbeans.conf"
3. Run netbeans as System Administrator

What can i do? Please help

Answer 1

Click on Tools -> Options in the General tab select the No Proxy radio button if you are not using any Proxy Settings for your Computer. This might be the problem.

Answer 2

Goto to Tools -> Plugins -> Settings

Edit the link of Plugin Portal to the correct URL as per your Netbeans installation from the following link:

https://cwiki.apache.org/confluence/display/NETBEANS/Where+to+download+plugins+for+NetBeans+10.0+and+earlier

For Netbeans 8.1 it is: http://plugins.archive.librebeans.org/catalogue/8.1/catalog.xml