Sign In with your
Trend Micro Account
Need Help?
Need More Help?

Create a technical support case if you need further support.

Unable to block some URLs due to Untrusted Certificate in InterScan Web Security Virtual Appliance (IWSVA) 6.5

    • Updated:
    • 25 Sep 2020
    • Product/Version:
    • Interscan Web Security Virtual Appliance 6.5
    • Platform:
    • N/A
Summary

IWSVA cannot block some URLs that failed on server certificate checking. The URLs that failed the checking will be categorized as “Generic”.

Details
Public

Based on IWSVA scanning flow, it will first do an HTTPS handshake and check the server certificate, then it will try to get URL category from TMUFE server.

If there is a certificate check error, IWSVA will send a certificate check failed page to the client and will not query the category information. As a result, the URL will be categorized as “Generic” and will not be blocked by pre-defined categories under the URL filtering policy.

In order to have the original category of those Generic URLs, add the root CA on active certificates under HTTP > Configuration > Digital Certificates.

For example:

https://sls.update.microsoft.com, there is a certificate warning for root CA "Microsoft Root Certificate Authority 2011" which is not trusted by Chrome and IWSVA. To block this, add the Root CA in Active Certificates.

Premium
Internal
Partner
Rating:
Category:
Configure; Troubleshoot
Solution Id:
000273582
Feedback
Did this article help you?

Thank you for your feedback!

To help us improve the quality of this article, please leave your email here so we can clarify further your feedback, if neccessary:
We will not send you spam or share your email address.

*This form is automated system. General questions, technical, sales, and product-related issues submitted through this form will not be answered.

If you need additional help, you may try to contact the support team. Contact Support

To help us improve the quality of this article, please leave your email here so we can clarify further your feedback, if neccessary:
We will not send you spam or share your email address.

*This form is automated system. General questions, technical, sales, and product-related issues submitted through this form will not be answered.