Problem with SSH on Centos 8

I tried to access to my sever , but it refuse connection.
Can you help me to resolve this problem?

below there is the debug:

larzillo@Luigi-Notebook:~$ ssh -v root@172.18.2.254
OpenSSH_7.6p1 Ubuntu-4ubuntu0.3, OpenSSL 1.0.2n 7 Dec 2017
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to 172.18.2.254 [172.18.2.254] port 22.
debug1: Connection established.
debug1: key_load_public: No such file or directory
debug1: identity file /home/larzillo/.ssh/id_rsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/larzillo/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/larzillo/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/larzillo/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/larzillo/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/larzillo/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/larzillo/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/larzillo/.ssh/id_ed25519-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.6p1 Ubuntu-4ubuntu0.3
ssh_exchange_identification: Connection closed by remote host