Installation of certificate for Java Runtime
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Update: as of 3 May 2019, a new certificate installation software was released, the new software automatically installs the certificate also in JAVA running environment.
JAVA running environment
The Java Runtime does not use the OS certificate store, but instead maintains it's own trusted certificate store. In order for Java based programs (e. g. Eclipse IDE) to be able to access secure sites, it is necessary to separately install a certificate into the Java certificate store.
Download the NetFree Security certificate from. http://netfree.link/netfree-ca.crt
Then run the following command in an elevated command prompt:
keytool -import -trustcacerts -alias netfree-ca -file netfree-ca.crt -keystore "%JAVA_HOME%"/jre/lib/security/cacerts -storepass changeit
"keytool" is located in the next location:
C:\Program Files\Java\jdk<Your JDK version>\bin
Sometimes JAVA-based software installs a JAVA private run environment within the program files in Program Files instead of using an already installed environment (for example, all intelij software (which includes android studio)). In this case it is necessary to import the NetFree certificate for each software separately.
To import the certificate, you must first the file that stores the certificates files. Usually the JAVA environment is installed in the program files folder in a subfolder named java or jre. Inside the subfolder there will be a path named:
lib\security\ and inside it a file named
Find the path to the cacerts file in the specific software installation, and use this path with the command mentioned above.
The security certificate can be imported using graphical software called KeyStore Explorer, the software is downloadable from here.
Instructions for use:
The software usually needs to be run as a administrater.
In the welcome window, click on the highlighted area:
In the window that opens, choose the cacerts file, which is in the location described above.
A password request will now appear:
The default password is
changeit (I have not yet found anyone who hears instructions and actually changes it by default...)
Now the file is open and we will see a list of existing certificates . Click "Import Trusted Certificates":
And select the NetFree certificate file. (can be downloaded from here).
In the next window, click "OK".
And thats it !
- The Security certificate must be stored in the same folder as keytool, otherwise in the command you must change the parameter "netfree-ca.crt" to the full path of the certificate.