Hide DNS Software Version on Sentora 1.0.3

[wormsunited]

Hi there,

It seems i am not able to Hide the Hide DNS Software Version in Sentora using named.conf on Bind. I added successfully the entry's as follows:

PHP Code:

// /etc/named.conf
options {
  // Hide bind version
  version "unknown";
}; 


Then i restarted the service:

PHP Code:

service named restart 


All was ok i checked the version too using this code:

PHP Code:

dig +short @ns1.example.com version.bind txt chaos 


In this case i got a return value of "unknown", problem is that it does not hide it. Now, this is a security problem since a new vulnerability maybe can be found in DNS software and script kiddies are scanning the Internet to exploit unpatched systems.

It's a best practice to hide software version on your DNS servers, although this is not a real protection it just makes a little harder to find your servers via scanning.

Any ideas why this is not working?
Thanks in advance