BigIP GTM/DNS - no listener?

Question

I recently ran an ihealth report on one of our BigIP GTM servers in preparation for an upgrade from V11.x to 13.  One of the warnings received was that "The BIG-IP GTM configuration is missing a listener object".  I checked and indeed there are no listeners defined.
That being said, the system is working correctly - and has been for a couple of years.  The GTM (and its identical twin at another DC) is authoritative for several of our zones.  It serves a mix of static IPs configured through ZoneRunner and WideIPs.  There are no other (non-F5) DNS servers in the mix.&nbsp;
I've read through (many) articles and documentation on configuring listeners and just can't see what I'm missing.  
&nbsp;
Do I, in fact, need to add a listener to this device which is currently behaving as expected?  If so, what is its purpose?&nbsp;
Thanks&nbsp;

stanislas_piro2 · Answer

May be the Bind server is responding to any DNS request instead of GTM.
to make it work, the Bind option listen-on port 53 { 127.0.0.1; }; may have been changed.
GTM, like all others BigIP products requires a "listener" object to handle traffic.
This listener object is a Virtual server with specific properties. 
A GTM listener create a Virtual server listening  on port 53 (tcp or udp) with a dns profile.

mohammed_m_irfa · Answer

Hello,&nbsp;
Can you please share the file location or path and file name?&nbsp;
options {
    listen-on port 53 {
        127.0.0.1;
        "zrd-acl-000-000";
    };
    listen-on-v6 port 53 {
        ::1;
    };&nbsp;

mohammed_m_irf1 · Answer

Hello,&nbsp;
Can you please share the file location or path and file name?&nbsp;
options {
    listen-on port 53 {
        127.0.0.1;
        "zrd-acl-000-000";
    };
    listen-on-v6 port 53 {
        ::1;
    };&nbsp;

stanislas_piro2 · Answer

You can edit it in webui. Don’t edit configuration files!&nbsp;

stanislas_piro2 · Answer

You can edit it in webui. Don’t edit configuration files!&nbsp;

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