Hi, sshd does not accept connections, even from the local system. Once the computer was powered up last time months ago, it worked fine. Unfortunately, I cannot remember for sure if there ran package update or it happened out of blue. sshd_config was not touched since the last time sshd worked, I started playing with config only after sshd already broke apart.
arch: x86-32bit subarch: atom_32
OpenSSH_8.4p1, OpenSSL 1.1.1l 24 Aug 2021
Any ssh attempt drops connection immediately.
Server command and log:
/usr/sbin/sshd -dddDe -o PidFile=/run/sshd.pid
Quote
debug2: load_server_config: filename /etc/ssh/sshd_config
debug2: load_server_config: done config len = 553
debug2: parse_server_config_depth: config /etc/ssh/sshd_config len 553
debug3: /etc/ssh/sshd_config:15 setting AddressFamily inet
debug3: /etc/ssh/sshd_config:21 setting HostKey /etc/ssh/ssh_host_ed25519_key
debug3: /etc/ssh/sshd_config:26 setting RekeyLimit default none
debug3: /etc/ssh/sshd_config:40 setting PubkeyAuthentication no
debug3: /etc/ssh/sshd_config:52 setting HostbasedAuthentication no
debug3: /etc/ssh/sshd_config:60 setting PasswordAuthentication yes
debug3: /etc/ssh/sshd_config:65 setting ChallengeResponseAuthentication no
debug3: /etc/ssh/sshd_config:86 setting UsePAM no
debug3: /etc/ssh/sshd_config:95 setting PrintMotd no
debug3: /etc/ssh/sshd_config:96 setting PrintLastLog no
debug3: /etc/ssh/sshd_config:123 setting AcceptEnv LANG LC_ALL LC_COLLATE LC_CTYPE LC_MESSAGES LC_MONETARY LC_NUMERIC LC_TIME LANGUAGE LC_ADDRESS LC_IDENTIFICATION LC_MEASUREMENT LC_NAME LC_PAPER LC_TELEPHONE
debug3: /etc/ssh/sshd_config:125 setting AcceptEnv COLORTERM
debug1: sshd version OpenSSH_8.4, OpenSSL 1.1.1l 24 Aug 2021
debug1: private host key #0: ssh-ed25519 SHA256:uSzM72qmxWdv7Wl3L4bGj5NMBpd0x9VxAwNibIXdP6k
debug1: rexec_argv[0]='/usr/sbin/sshd'
debug1: rexec_argv[1]='-dddDe'
debug1: rexec_argv[2]='-o'
debug1: rexec_argv[3]='PidFile=/run/sshd.pid'
debug3: oom_adjust_setup
debug1: Set /proc/self/oom_score_adj from 0 to -1000
debug2: fd 3 setting O_NONBLOCK
debug1: Bind to port 22 on 0.0.0.0.
Server listening on 0.0.0.0 port 22.
debug3: fd 4 is not O_NONBLOCK
debug1: Server will not fork when running in debugging mode.
debug3: send_rexec_state: entering fd = 7 config len 553
debug3: ssh_msg_send: type 0
debug3: send_rexec_state: done
debug1: rexec start in 4 out 4 newsock 4 pipe -1 sock 7
debug3: recv_rexec_state: entering fd = 5
debug3: ssh_msg_recv entering
debug3: recv_rexec_state: done
debug2: parse_server_config_depth: config rexec len 553
debug3: rexec:15 setting AddressFamily inet
debug3: rexec:21 setting HostKey /etc/ssh/ssh_host_ed25519_key
debug3: rexec:26 setting RekeyLimit default none
debug3: rexec:40 setting PubkeyAuthentication no
debug3: rexec:52 setting HostbasedAuthentication no
debug3: rexec:60 setting PasswordAuthentication yes
debug3: rexec:65 setting ChallengeResponseAuthentication no
debug3: rexec:86 setting UsePAM no
debug3: rexec:95 setting PrintMotd no
debug3: rexec:96 setting PrintLastLog no
debug3: rexec:123 setting AcceptEnv LANG LC_ALL LC_COLLATE LC_CTYPE LC_MESSAGES LC_MONETARY LC_NUMERIC LC_TIME LANGUAGE LC_ADDRESS LC_IDENTIFICATION LC_MEASUREMENT LC_NAME LC_PAPER LC_TELEPHONE
debug3: rexec:125 setting AcceptEnv COLORTERM
debug1: sshd version OpenSSH_8.4, OpenSSL 1.1.1l 24 Aug 2021
debug1: private host key #0: ssh-ed25519 SHA256:uSzM72qmxWdv7Wl3L4bGj5NMBpd0x9VxAwNibIXdP6k
debug1: inetd sockets after dupping: 3, 3
Connection from 127.0.0.1 port 59658 on 127.0.0.1 port 22 rdomain ""
ebug1: Local version string SSH-2.0-OpenSSH_8.4
debug1: Remote protocol version 2.0, remote software version OpenSSH_8.4
debug1: match: OpenSSH_8.4 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug3: ssh_sandbox_init: preparing seccomp filter sandbox
debug2: Network child is on pid 8608
debug3: preauth child monitor started
debug3: privsep user:group 22:22 [preauth]
debug1: permanently_set_uid: 22/22 [preauth]
debug3: ssh_sandbox_child: setting PR_SET_NO_NEW_PRIVS [preauth]
debug3: ssh_sandbox_child: attaching seccomp filter program [preauth]
debug1: list_hostkey_types: ssh-ed25519 [preauth]
debug3: send packet: type 20 [preauth]
debug1: SSH2_MSG_KEXINIT sent [preauth]
debug1: monitor_read_log: child log fd closed
debug3: mm_request_receive entering
debug1: do_cleanup
debug1: Killing privsep child 8608
Tried different things found on google, such as network MTU, various ciphers/MACs/KexAlgorithms settings, nothing sheds any light. Getting kind of desperate now.
Question
prof
Hi, sshd does not accept connections, even from the local system. Once the computer was powered up last time months ago, it worked fine. Unfortunately, I cannot remember for sure if there ran package update or it happened out of blue. sshd_config was not touched since the last time sshd worked, I started playing with config only after sshd already broke apart.
arch: x86-32bit subarch: atom_32
OpenSSH_8.4p1, OpenSSL 1.1.1l 24 Aug 2021
Any ssh attempt drops connection immediately.
Server command and log:
/usr/sbin/sshd -dddDe -o PidFile=/run/sshd.pidClient command and log:
ssh -vvv localhostTried different things found on google, such as network MTU, various ciphers/MACs/KexAlgorithms settings, nothing sheds any light. Getting kind of desperate now.
Thank you for all your help!
Link to comment
Share on other sites
2 answers to this question
Recommended Posts