Wat vooraf ing:
Ik heb een laptop met windows. Als ik met Putty + Key naar een server wil dan krijg ik verbinding.
Probeer ik verbinding te maken met een virtuele debian machine naar diezelfde server dan lukt dit niet.
De oplossingsroute die door Paul vd Vlis voorgesteld word is om zelf een server te draaien en dan te
kijken waar het misgaat.
/usr/sbin/sshd -ddd -D -p 2222 2>&1 | awk '{ print strftime("%T: "), $0; fflush(); }' | tee sshd.log
17:35:25: debug2: load_server_config: filename /etc/ssh/sshd_config
17:35:25: debug2: load_server_config: done config len = 284
17:35:25: debug2: parse_server_config: config /etc/ssh/sshd_config len 284
17:35:25: debug3: /etc/ssh/sshd_config:13 setting Port 2222
17:35:25: debug3: /etc/ssh/sshd_config:61 setting ChallengeResponseAuthentication no
17:35:25: debug3: /etc/ssh/sshd_config:84 setting UsePAM yes
17:35:25: debug3: /etc/ssh/sshd_config:89 setting X11Forwarding yes
17:35:25: debug3: /etc/ssh/sshd_config:93 setting PrintMotd no
17:35:25: debug3: /etc/ssh/sshd_config:113 setting AcceptEnv LANG LC_*
17:35:25: debug3: /etc/ssh/sshd_config:116 setting Subsystem sftp /usr/lib/openssh/sftp-server
17:35:25: debug3: /etc/ssh/sshd_config:124 setting LogLevel DEBUG3
17:35:25: debug1: sshd version OpenSSH_7.4, OpenSSL 1.0.2l 25 May 2017
17:35:25: debug1: key_load_private: Permission denied
17:35:25: Could not load host key: /etc/ssh/ssh_host_rsa_key
17:35:25: debug1: key_load_private: Permission denied
17:35:25: Could not load host key: /etc/ssh/ssh_host_ecdsa_key
17:35:25: debug1: key_load_private: Permission denied
17:35:25: Could not load host key: /etc/ssh/ssh_host_ed25519_key
17:35:25: debug1: setgroups() failed: Operation not permitted
17:35:25: debug1: rexec_argv[0]='/usr/sbin/sshd'
17:35:25: debug1: rexec_argv[1]='-ddd'
17:35:25: debug1: rexec_argv[2]='-D'
17:35:25: debug1: rexec_argv[3]='-p'
17:35:25: debug1: rexec_argv[4]='2222'
17:35:25: debug3: oom_adjust_setup
17:35:25: debug1: Set /proc/self/oom_score_adj from 0 to -1000
17:35:25: debug2: fd 3 setting O_NONBLOCK
17:35:25: debug1: Bind to port 2222 on 0.0.0.0.
17:35:25: Server listening on 0.0.0.0 port 2222.
17:35:25: debug2: fd 4 setting O_NONBLOCK
17:35:25: debug3: sock_set_v6only: set socket 4 IPV6_V6ONLY
17:35:25: debug1: Bind to port 2222 on ::.
17:35:25: Server listening on :: port 2222.
17:35:29: debug3: fd 5 is not O_NONBLOCK
17:35:29: debug1: Server will not fork when running in debugging mode.
17:35:29: debug3: send_rexec_state: entering fd = 8 config len 284
17:35:29: debug3: ssh_msg_send: type 0
17:35:29: debug3: send_rexec_state: done
17:35:29: debug1: rexec start in 5 out 5 newsock 5 pipe -1 sock 8
17:35:29: debug1: inetd sockets after dupping: 3, 3
17:35:29: Connection from ::1 port 38542 on ::1 port 2222
17:35:29: debug1: Client protocol version 2.0; client software version OpenSSH_7.4p1 Debian-10+deb9u4
17:35:29: debug1: match: OpenSSH_7.4p1 Debian-10+deb9u4 pat OpenSSH* compat 0x04000000
17:35:29: debug1: Local version string SSH-2.0-OpenSSH_7.4p1 Debian-10+deb9u4
17:35:29: debug1: Enabling compatibility mode for protocol 2.0
17:35:29: debug2: fd 3 setting O_NONBLOCK
17:35:29: debug3: ssh_sandbox_init: preparing seccomp filter sandbox
17:35:29: debug2: Network child is on pid 7364
17:35:29: debug3: preauth child monitor started
17:35:29: debug3: ssh_sandbox_child: setting PR_SET_NO_NEW_PRIVS [preauth]
17:35:29: debug3: ssh_sandbox_child: attaching seccomp filter program [preauth]
17:35:29: debug1: list_hostkey_types: [preauth]
17:35:29: No supported key exchange algorithms [preauth]
17:35:29: debug1: do_cleanup [preauth]
17:35:29: debug3: PAM: sshpam_thread_cleanup entering [preauth]
17:35:29: debug1: monitor_read_log: child log fd closed
17:35:29: debug3: mm_request_receive entering
17:35:29: debug1: do_cleanup
17:35:29: debug3: PAM: sshpam_thread_cleanup entering
17:35:29: debug1: Killing privsep child 7364
17:35:29: debug1: audit_event: unhandled event 12
op de client zie ik:
ssh -vvv bas@localhost -p 2222
OpenSSH_7.4p1 Debian-10+deb9u4, OpenSSL 1.0.2l 25 May 2017
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 18: Applying options for *
debug2: resolving "localhost" port 2222
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to localhost [::1] port 2222.
debug1: Connection established.
debug1: identity file /home/bas/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /home/bas/.ssh/id_rsa-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.4p1 Debian-10+deb9u4
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.4p1 Debian-10+deb9u4
debug1: match: OpenSSH_7.4p1 Debian-10+deb9u4 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to localhost:2222 as 'bas'
debug3: put_host_port: [localhost]:2222
debug3: hostkeys_foreach: reading file "/home/bas/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/bas/.ssh/known_hosts:3
debug3: load_hostkeys: loaded 1 keys from [localhost]:2222
debug3: send packet: type 20
debug1: SSH2_MSG_KEXINIT sent
Connection reset by ::1 port 2222
Graag ontvang ik een bevestiging retour.
Met vriendelijke groet,
Bas Neve