TufinOS 2.x is based on CentOS 6.x. For this version support has reached its EOL (End of Life), so no more support for CentOS 6.10 and below is provided, not even security patches. Therefore Tufin has published TufinOS 3.x, based on CentOS 7 that will be supported until June 30th, 2024.
Besides this, if you want to upgrade to TOS 20-2 you need to upgrade TufinOS also.
So please prepare this upgrade carefully. Some information about it can be found on Tufin's web site, later on we will also provide some information.