Finally got root. If you are not one of the networking guys it could be a suffer… In this forum there are a lot of good hints, if you put it together, you can get root. Try not to over-complicate things, you only need to change one simple thing in one of the configuration files. On a free server it could be really tough and time consuming to achieve your goals because of the constant resets and edits.
Thanks @snowscan this machine reminds me to one of the hardest machines at OSCP course… It taught me new things and I need to learn basic network stuffs…