WHM root login invalid, SSH root login works

[mysql_connect]

I just took over the administration of a new (VPS) WHM server, logging in by SSH as root works just fine, I have superuser access, etc but WHM always says "invlaid login".
I have disabled cphulk (it was disabled anyways).

/etc/redhat-release:CentOS release 6.8 (Final)
/usr/local/cpanel/version:11.58.0.34
/var/cpanel/envtype:kvm
CPANEL=release
Server version: Apache/2.2.31 (Unix)
Server built:  Feb  2 2016 02:57:59
Cpanel::Easy::Apache v3.32.9 rev9999
PHP 5.5.31 (cli) (built: Feb  2 2016 03:09:24)
Copyright (c) 1997-2015 The PHP Group
Zend Engine v2.5.0, Copyright (c) 1998-2015 Zend Technologies
  with the ionCube PHP Loader v4.7.5, Copyright (c) 2002-2014, by ionCube Ltd., and
  with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2015, by Zend Technologies
  with Zend Guard Loader v3.3, Copyright (c) 1998-2014, by Zend Technologies
mysql  Ver 14.14 Distrib 5.6.33, for Linux (x86_64) using  EditLine wrapper

 

[cPanelMichael]

Hello,

Could you let us know the output from /usr/local/cpanel/logs/login_log when authentication fails?

Also, just in-case, make sure you are using ports 2087/2086 for WHM, and not 2082/2083.

Thank you.