I have some issues while using some applet in my application. It's showing that i have untrusted applet, that my jar files are not allowed to be run, showing that they are also using an old version of java (I'm using java 1.7).
Do you have any solution, like maybe using a third-pary certificate ?
Anyway, thanks for your help.
Check if this helps. You will see more details here
Setting the Security levels through the Java Control Panel
In the Java Control Panel, click on the Security tab.
Select the desired Security level.
Click Apply.
Click OK to save changes made to the Java Control Panel.
Security levels in the Java Control Panel
Very High
This is the most restrictive security level setting. All the applications that are signed with a valid certificate and include the Permissions attribute in the manifest for the main JAR file are allowed to run with security prompts. All other applications are blocked.
High
This is the minimum recommended (and default) security level setting. Applications that are signed with a valid or expired certificate and include the Permissions attribute in the manifest for the main JAR file are allowed to run with security prompts. Applications are also allowed to run with security prompts when the revocation status of the certificate cannot be checked. All other applications are blocked.
Medium (removed from Java 8 Update 20 and later versions)
Only unsigned applications that request all permissions are blocked. All other applications are allowed to run with security prompts. Selecting the Medium security level is not recommended and will make your computer more vulnerable should you run a malicious application.
The part of "Resolution" in that website said.
"Since the issue is being reported by the Java software or the Java plugin in the browser, there is nothing we can do to directly resolve the issue.
There are several workarounds possible, depending on how the site deals with browser security issues.
The most secure approach is to allow the applet to be run each time you are prompted.
If using Internet Explorer, click the [Run] button on the security warning popup window.
If using Firefox, two actions may be needed. First if the warning "This connection is untrusted" is displayed, click the "I Understand the Risks""
Related
I am trying to run a small applet in my Chrome window, but am getting the error message.
I do see all the replies telling me to change my security to medium, but that option does not exist in version 8. So far several hours of googling and asking help from classmates has brought no progress.
Can anyone suggest something please?
Medium was removed in Java 8u20:
Medium (removed from Java 8 Update 20 and later versions)
Only unsigned applications that request all permissions are blocked. All other applications are allowed to run with security prompts. Selecting the Medium security level is not recommended and will make your computer more vulnerable should you run a malicious application.
Keep in mind, this only applies to unsigned applets that request all permissions.
What to do
To run these applets, you now must add the site to the exception list under the Security tab when you access your Java settings from the Control Panel.
If the applet is not on a website, you must use the applet viewer, which allows you to run applets outside of a browser
I'm trying to play Java applets from bodo.com
but whenever I click on one of the games, I get a pop-up that says:
Application blocked by security settings
Name: "game"
Location: http://www.bodo.com
Your security settings have blocked an application from running with an
out-of-date or expired version of java.
I don't understand this because I have the latest version of Java installed.
I just had this problem myself. To solve this I went to the Windows Control Panel -> Programs -> Java. There you go to Security and press Edit Site List..., click Add and there you type in the location (http://www.bodo.com) and press OK.
If you still have problem you can try changing the Security Level to Medium and this you also manage under the Security tab in Java Control Panel.
For me, the exception site list helped when the applet is not signed or certified.
For out of date error, I need to change the security level to medium.
And make sure you close all the browser windows and start fresh after you made the changes.
The instruction here shows how to change security level: JCP security help on Java.com
I am running a Java applet in the browser. However, each browser displays a warning of
"This applet may not be trusted... etc."
and the user is allowed to click Run Anyway or Cancel. This is built in to the browsers / Java configuration. (If the user is running on a security level > Medium, the applet is simply blocked.)
Is there a way for me to sign the applet in such a way that no dialogs appear? Or will they still appear even if the applet is "trusted"?
No, you cannot.
It is no longer generally considered safe to run Java in the browser. The Java plugin has implemented a number of security measures that will display a spectrum of different security warnings depending on the user's current Java security level and the signed status of the applet, but no settings will disable the warnings entirely (short of settings which block the applet from loading at all). Additionally, some web browsers and operating systems have begun to apply their own, separate restrictions to Java applets. For instance, Google Chrome will display a warning bar before attempting to load the Java plugin, and Mac OS X does not install Java at all by default.
If you have any choice in the matter, avoid writing Java applets. Like many other older web technologies, like Shockwave and Quicktime, they are part of the past, not the future.
I have made web application that uses java applets, from today when i open the application java show me a sign that says:
"the execution of applications from unknown publishers will be block because are potentially unsafe and presents a segurity risk"
and asks me to accept the risk and confirm if I want to run it.
The applet is self-signed and the java version is 7u25
why is showing me this now?
How I can do to get back to normal?
What can I do?
As a security measure, the Java plugin is disabled by default in recent versions of Firefox, but you can enable the plugin under Add-ons > Plugins. Consider doing so temporarily for trusted applets.
I am trying to run my applet in a browser, chrome/IE but I get the following message:
Your security settings have blocked a local application from running
Due to Oracle, changing security level in java control panel from high to medium will solve the issue, but it does not. I have even tried the low level, and custom level too enabling all applications to run without any prompt. I have also changed the advanced setting to allow unsigned applets to run.
It does not work in any way.
Any help is appreciated.
Do the following
Go to IE
Tools -> Internet Options
Go to the Advanced Tab
Under Java(Sun) Select the check box saying 'Use JRE ... for applet' (requires restart)
Select Apply/Ok. Restart IE and try loading the applet again.
You can either make sure that the applet is signed by a valid cert, and it is not a self-signed cert. Or if you just want to bypass the warning, you can add the domain address to Exception Site List.
Java Control Panel -> Security tab -> Exception Site List
and also you may also try to add the website to the Trusted Zone in your IE if you are sure that the website is safe. In Trusted Zone, there are fewer restrictions to block you from running applet and running the out-of-date ActiveX.