On 4/28/2016 2:02 AM, Andreas Benzler wrote: > what is wrong with the default sshd server. > > after retry to connect sshd - key changed from known hosts???? I've installed centos a LOT of times, versions 5, 6, and 7, and never had any issues with the built in sshd service, and a variety of clients, including other linux ssh, putty and securecrt on windows, gui SCP/SFTP utilties(they use sshd too), freebsd ssh, solaris ssh, aix ssh. the "key changed from known_hosts" error happens if your client had previously connected with the same "user at hostname" on a previous installation of the server OS with a different ssh_host_key you need to provide a lot more information if you expect a more specific answer from anyone, like what version of CentOS did you install, what client software you're using to connect to it, any pertinent background information like was this hostname previously used for a different OS install, etc etc. -- john r pierce, recycling bits in santa cruz