Showing results for 
Search instead for 
Did you mean: 
David White
Cisco Employee
Cisco Employee


Update - Service Decommissioning

Please Note - the Cisco IOS Content Filtering service has been decommissioned as of January 1st, 2014.  Please see the End of Life notice posted here for more information:



Overview of Cisco IOS Content Filtering

The  Subscription-based Cisco IOS Content Filtering feature interacts with  the Trend Micro URL filtering service so that HTTP requests can be  allowed or blocked, and logged, based on a content filtering policy. The  content filtering policy specifies how to handle items such as web  categories, reputations (or security ratings), trusted domains,  untrusted domains, and keywords. URLs are cached on the router, so that  subsequent requests for the same URL do not require a lookup request,  thus improving performance.


For more information about the Cisco IOS Content Filtering solution, please see the IOS Content Filtering document (DOC-8028)



On September 4, 2013 the Identity certificate was changed on the Trend Micro server that the Cisco IOS device talks to.  Since the new identity certificate is signed by a different Certificate Authority (CA), all users of the Cisco IOS Content Filtering feature must replace the CA certificate installed on the Cisco IOS device with the new CA certificate listed below, for the content filtering feature to continue working after Septemeber 4, 2013.



Affected users (which is all users who are using the Cisco IOS Content Filtering Feature), must log into their Cisco IOS device and update the CA Certificate for the Trend Micro server.  In the below example, the trustpoint name is trendmicro, however it may be different on your specific device.  You may however just copy and paste in the commands below (in configuration mode) to install the new CA certificate.


Step 1 - Remove Existing (old) CA Certificate


Issue the command no crypto pki trustpoint trendmicro (where trendmicro is the current name of your trustpoint).  You will be prompted to ensure you want to delete the existing trustpoint, choose Yes.




router(config)#no crypto pki trustpoint trendmicro

% Removing an enrolled trustpoint will destroy all certificates

received from the related Certificate Authority.


Are you sure you want to do this? [yes/no]: yes

% Be sure to ask the CA administrator to revoke your certificates.



Step 2 - Installing new CA certificate



crypto pki trustpoint trendmicro

revocation-check none

enrollment terminal

crypto pki authenticate trendmicro








After pasting in the above commands, you should see the following output, and the Cisco IOS device will prompt you to accept the new certificate.  Please make sure you answer yes at the prompt.




Trustpoint 'trendmicro' is a subordinate CA and holds a non self signed cert
Certificate has the following attributes:
       Fingerprint MD5: 52F268ED F9148A9F 59384DDF A4131E2D
      Fingerprint SHA1: 0AD58B34 4C169343 D107713D BEE0DCCA 261F1EE4


% Do you accept this certificate? [yes/no]: yes

Trustpoint CA certificate accepted

% Certificate successfully imported



Once the CA certificate has been installed, the Cisco IOS Content Filtering feature will resume working.




Certificate Installation Verification

To verify that the new CA certificate has been installed properly, issue the command:  show crypto pki certificates


Trend Micro Communication Verification

To verify that the Cisco IOS device is able to successfully communicate with the Trend Micro server issue the following commands:


   trm register


   show ip trm subscription status



You forcing the Cisco IOS device to register with Trend Micro, you should see that the status is Active in the output of show ip trm subscription status.


router# show ip trm subscription status 

       Package Name:  Security & Productivity


             Status:  Active

Status Update Time:  12:30:25 UTC Wed Oct 3 2013

    Expiration-Date:  Tue Mar 11 07:00:00 2014

    Last Req Status:  Processed response successfully

Last Req Sent Time:  10:22:11 UTC Wed Oct 3 2013


Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community:

Quick Links