I/A Series R2/G3 Web Graphics Blocked or Security Warnings After Java Updates

[Product_Support]

Issue

When accessing I/A Series R2 or G3 station graphics via a web browser, graphics fail to load or repeated Java security warnings appear. Common symptoms include:

• “Application Blocked by Security Settings”

  

• “Your security settings have blocked an application from running with an insecure or expired JRE.”
• Popups warning of security vulnerabilities for each Java applet.

  

• In Firefox: “This plugin has security vulnerabilities. Click here to activate the Java(TM) Platform SE Plugin.”

  

Product Line

TAC IA Series

Environment

• I/A Series R2
• I/A Series G3

Cause

Oracle introduced stricter Java security controls starting with Java 7 Update 11 and further tightened them in Update 51 and later.

• Unsigned or self-signed applets are blocked by default.
• Known vulnerabilities in older Java versions trigger warnings.
• Browser plugins (IE, Firefox) enforce additional security prompts.

Resolution

Several approaches exist depending on site security policy:

Option 1: Use Java Exception Site List (Recommended for Java 7u51+)

1. Open Control Panel → Java → Security.
2. Ensure Security Level is High (or Medium if required).

   

3. Click Edit Site List… → Add.
4. Add URLs for all I/A Series servers and controllers:
   • http://<EnterpriseServer-host-or-IP>
   • http://<UNC-or-JACE-host-or-IP>

     

     

   • Confirm changes and restart browser.

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Option 2: Adjust Java Security Level (Legacy Workaround)

• For Java 7 Update 17 or earlier:
  1. Open Java Control Panel → Security tab.
  2. Set Security Level to Medium or Low (not recommended for high-security environments).

     

  3. Restart browser.

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Option 3: Downgrade Java (Last Resort)

• Testing shows Java 7u9 does not trigger prompts in IE9.
• Downgrade only if site policy allows and system is isolated.

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Option 4: Browser-Specific Workarounds

• Internet Explorer: Click Run on each security prompt.
• Firefox:
  • If warning “This connection is untrusted”, click I Understand the Risks.
  • To suppress plugin warnings (not recommended):
    • Enter about:config in address bar.
    • Set extensions.blocklist.enabled to false.

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Option 5: Clear Java Cache

If graphics fail to load after bypassing warnings:

1. Open Java Control Panel → General tab → Temporary Internet Files → Settings.
2. Uncheck Keep temporary files on my computer.
3. Click OK and restart browser.