Skip to Content

[Solved] Workaround to Fix VPN Application blocked by Java Security Error

Problem: ‘Application blocked by Java Security’ error dialog box prompt when attempt to connect VPN.

Application blocked by Java Security

Content Summary

Solution 1: Add websites to exception list in Java
Solution 2: Clear Java cache
Solution 3: Flush DNS
Solution 4: Clear web browser cache
Solution 5: Reinstall VPN Software
Solution 6: Install Windows updates
Solution 7: Reinstall Java
Reference

Solution 1: Add websites to exception list in Java

Step 1: Go to Start > type Java control panel and press Enter key.

Step 2: Go to Security tab. If Security Level is set to Very High then reduce it to High.

Step 3: Click on Edit Site List button.

Step 4: Click Add to type in the site URL.

Step 5: In the highlighted line, type the URL and then click OK button.

Step 6: After launching web browser and attempting the URL, Do you trust prompt will come up, tick Always trust boxes and then click OK.

Solution 2: Clear Java cache

Step 1: Go to Start > type Java control panel and press Enter key.

Step 2: Navigate to General tab, and click Settings under the temporary internet files section.

Step 3: Click Delete Files on the temporary files settings dialog box

Step 4: Click OK on the Delete Files and Applications prompt and follow the prompts.

Solution 3: Flush DNS

Step 1: Go to Start > Type cmd.

Step 2: Type ipconfig /flushdns and press Enter.

Solution 4: Clear web browser cache

Step 1: Launch web browser e.g. Microsoft Edge

Step 2: Press Ctrl + Shift + Delete to access Clear recent history dialog.

Step 3: Under Time range to clear drop-down menu, select Everything.

Step 4: Make sure to check Cache box. Click on Clear Now.
Note: Ctrl + Shift + Delete can also be used to clear cache on other web browsers.

Solution 5: Reinstall VPN Software

Solution 6: Install Windows updates

Step 1: Go to Start > type windows update in the search box and then click on Windows Update to proceed.

Step 2: Check for updates and install the available updates.

Step 3: Restart PC after the update is completed.

Solution 7: Reinstall Java

Reference

What should I do when I see a security prompt from Java?
Why are Java applications blocked by your security settings with the latest Java?

Alex Lim is a certified IT Technical Support Architect with over 15 years of experience in designing, implementing, and troubleshooting complex IT systems and networks. He has worked for leading IT companies, such as Microsoft, IBM, and Cisco, providing technical support and solutions to clients across various industries and sectors. Alex has a bachelor’s degree in computer science from the National University of Singapore and a master’s degree in information security from the Massachusetts Institute of Technology. He is also the author of several best-selling books on IT technical support, such as The IT Technical Support Handbook and Troubleshooting IT Systems and Networks. Alex lives in Bandar, Johore, Malaysia with his wife and two chilrdren. You can reach him at [email protected] or follow him on Website | Twitter | Facebook

    Ads Blocker Image Powered by Code Help Pro

    Your Support Matters...

    We run an independent site that is committed to delivering valuable content, but it comes with its challenges. Many of our readers use ad blockers, causing our advertising revenue to decline. Unlike some websites, we have not implemented paywalls to restrict access. Your support can make a significant difference. If you find this website useful and choose to support us, it would greatly secure our future. We appreciate your help. If you are currently using an ad blocker, please consider disabling it for our site. Thank you for your understanding and support.