SSH blocking

logs.txt

$ ssh HOST -vvv
OpenSSH_7.5p1 Ubuntu-10ubuntu0.1, OpenSSL 1.0.2g  1 Mar 2016
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: resolving "HOST" port 22
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to HOST [HOST_IP] port 22.
debug1: Connection established.
debug1: identity file /home/ju/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ju/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ju/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ju/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ju/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ju/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ju/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ju/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.5p1 Ubuntu-10ubuntu0.1