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

Create a technical support case if you need further support.

Deep Security Manager firewall fails to block outbound UDP traffic

    • Updated:
    • 10 May 2019
    • Product/Version:
    • Deep Security 10.0
    • Deep Security 10.1
    • Deep Security 10.2
    • Deep Security 10.3
    • Deep Security 11.0
    • Deep Security 11.1
    • Deep Security 11.2
    • Deep Security 11.3
    • Platform:
    • N/A N/A
Summary

After applying a test rule to block all outbound UDP traffic, the host-based firewall within Deep Security Manager (DSM) is not blocking the UDP traffic as expected.

Details
Public

The scenario occurs because the Deny outbound rule has been hard-coded open, thus the firewall will not be able to block the outbound UDP traffic. This is created by design, as it can be hazardous and may completely isolate machines of the network if applied improperly with other rules.

If it is necessary to block outbound UDP traffic, you can create an incoming Deny rule to block the reply from the DNS server.

For more information about the Deep Security firewall, refer to the following links:

Premium
Internal
Rating:
Category:
Troubleshoot
Solution Id:
1122625
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.