Centos fix permission error

by mistake I messed up with permissions and now nothing is working i tried various techniques, chmod, bash scripts to update permissions, reset to default of each folder but it didn't worked Problem - I am unable to login into plesk, ssh etc due to file permission error SSH is giving connection refused error as I was having a firewall but i tried manually deleting that still it shows connection refused I have rescue mode access where we can mount server ssd and than change the permissions or run repair