저는 항상 비밀번호 없는 로그인을 사용해 왔으며 이를 많은 시스템에 설정하고 이와 관련된 많은 문제를 디버깅했습니다. 하지만 근본 원인을 진단할 수 없는 상황입니다. Ubuntu 18.04 서버와 Linux Mint 18.1 클라이언트가 있습니다. 동일한 클라이언트를 사용하여 RSA 키를 사용하여 다른 서버에 비밀번호 없이 로그인할 수 있으므로 클라이언트에 문제가 있다고 의심되지 않습니다. 그리고 서버는 이 Linux Mint 클라이언트 또는 다른 클라이언트(RHEL 7.3)에 대한 비밀번호 없는 로그인을 허용하지 않으므로 이는 서버 구성 문제일 가능성이 높습니다. 서버의 사용자 이름은 ubuntu이므로 /home/ubuntu, /home/ubuntu/.ssh 및 /home/ubuntu/.ssh/authorized_keys에 대한 권한을 확인했는데 모든 것이 예상대로였습니다. 아까와 마찬가지로 ~/.ssh/id_rsa.pub 키를 서버의 ~/.ssh/authorized_keys 파일에 복사했습니다. SSH를 시도하면 서버에 다음 로그가 표시되고 RSA 키 로그인을 허용하지 않는 오류가 보고되지 않습니다.
서버 DEBUG3 로그
debug3: fd 5 is not O_NONBLOCK
debug1: Forked child 31422.
debug3: oom_adjust_restore
debug1: Set /proc/self/oom_score_adj to 0
debug1: rexec start in 5 out 5 newsock 5 pipe 7 sock 8
debug3: send_rexec_state: entering fd = 8 config len 371
debug3: ssh_msg_send: type 0
debug3: send_rexec_state: done
debug1: inetd sockets after dupping: 3, 3
Connection from 10.20.30.3 port 42760 on 10.20.30.2 port 22
debug1: Client protocol version 2.0; client software version SSH
debug1: no match: SSH
debug1: Local version string SSH-2.0-OpenSSH_7.6p1 Ubuntu-4ubuntu0.3
debug2: fd 3 setting O_NONBLOCK
debug3: ssh_sandbox_init: preparing seccomp filter sandbox
debug2: Network child is on pid 31423
debug3: preauth child monitor started
debug3: privsep user:group 109:65534 [preauth]
debug1: permanently_set_uid: 109/65534 [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-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519 [preauth]
debug3: send packet: type 20 [preauth]
debug1: SSH2_MSG_KEXINIT sent [preauth]
debug3: receive packet: type 20 [preauth]
debug1: SSH2_MSG_KEXINIT received [preauth]
debug2: local server KEXINIT proposal [preauth]
debug2: KEX algorithms: curve25519-sha256,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1 [preauth]
debug2: host key algorithms: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519 [preauth]
debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected] [preauth]
debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected] [preauth]
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1 [preauth]
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1 [preauth]
debug2: compression ctos: none,[email protected] [preauth]
debug2: compression stoc: none,[email protected] [preauth]
debug2: languages ctos: [preauth]
debug2: languages stoc: [preauth]
debug2: first_kex_follows 0 [preauth]
debug2: reserved 0 [preauth]
debug2: peer client KEXINIT proposal [preauth]
debug2: KEX algorithms: diffie-hellman-group-exchange-sha256,diffie-hellman-group1-sha1,diffie-hellman-group14-sha1 [preauth]
debug2: host key algorithms: ssh-rsa [preauth]
debug2: ciphers ctos: aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,3des-cbc,arcfour [preauth]
debug2: ciphers stoc: aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,3des-cbc,arcfour [preauth]
debug2: MACs ctos: hmac-md5,hmac-md5-96,hmac-sha1,hmac-sha1-96,hmac-sha2-256,hmac-sha2-512 [preauth]
debug2: MACs stoc: hmac-md5,hmac-md5-96,hmac-sha1,hmac-sha1-96,hmac-sha2-256,hmac-sha2-512 [preauth]
debug2: compression ctos: none [preauth]
debug2: compression stoc: none [preauth]
debug2: languages ctos: [preauth]
debug2: languages stoc: [preauth]
debug2: first_kex_follows 0 [preauth]
debug2: reserved 0 [preauth]
debug1: kex: algorithm: diffie-hellman-group-exchange-sha256 [preauth]
debug1: kex: host key algorithm: ssh-rsa [preauth]
debug1: kex: client->server cipher: aes128-ctr MAC: hmac-sha1 compression: none [preauth]
debug1: kex: server->client cipher: aes128-ctr MAC: hmac-sha1 compression: none [preauth]
debug1: expecting SSH2_MSG_KEX_DH_GEX_REQUEST [preauth]
debug3: receive packet: type 34 [preauth]
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST received [preauth]
debug3: mm_request_send entering: type 0 [preauth]
debug3: mm_request_receive entering
debug3: monitor_read: checking request 0
debug3: mm_answer_moduli: got parameters: 2048 7680 8192
debug3: mm_request_send entering: type 1
debug2: monitor_read: 0 used once, disabling now
debug3: mm_choose_dh: waiting for MONITOR_ANS_MODULI [preauth]
debug3: mm_request_receive_expect entering: type 1 [preauth]
debug3: mm_request_receive entering [preauth]
debug3: mm_choose_dh: remaining 0 [preauth]
debug1: SSH2_MSG_KEX_DH_GEX_GROUP sent [preauth]
debug3: send packet: type 31 [preauth]
debug2: bits set: 3906/7680 [preauth]
debug1: expecting SSH2_MSG_KEX_DH_GEX_INIT [preauth]
debug3: receive packet: type 32 [preauth]
debug2: bits set: 3905/7680 [preauth]
debug3: mm_key_sign entering [preauth]
debug3: mm_request_send entering: type 6 [preauth]
debug3: mm_key_sign: waiting for MONITOR_ANS_SIGN [preauth]
debug3: mm_request_receive_expect entering: type 7 [preauth]
debug3: mm_request_receive entering [preauth]
debug3: mm_request_receive entering
debug3: monitor_read: checking request 6
debug3: mm_answer_sign
debug3: mm_answer_sign: hostkey proof signature 0x55689da150b0(271)
debug3: mm_request_send entering: type 7
debug2: monitor_read: 6 used once, disabling now
debug3: send packet: type 33 [preauth]
debug3: send packet: type 21 [preauth]
debug2: set_newkeys: mode 1 [preauth]
debug1: rekey after 4294967296 blocks [preauth]
debug1: SSH2_MSG_NEWKEYS sent [preauth]
debug1: expecting SSH2_MSG_NEWKEYS [preauth]
debug3: receive packet: type 21 [preauth]
debug1: SSH2_MSG_NEWKEYS received [preauth]
debug2: set_newkeys: mode 0 [preauth]
debug1: rekey after 4294967296 blocks [preauth]
debug1: KEX done [preauth]
debug3: receive packet: type 5 [preauth]
debug3: send packet: type 6 [preauth]
debug3: receive packet: type 50 [preauth]
debug1: userauth-request for user ubuntu service ssh-connection method none [preauth]
debug1: attempt 0 failures 0 [preauth]
debug3: mm_getpwnamallow entering [preauth]
debug3: mm_request_send entering: type 8 [preauth]
debug3: mm_getpwnamallow: waiting for MONITOR_ANS_PWNAM [preauth]
debug3: mm_request_receive_expect entering: type 9 [preauth]
debug3: mm_request_receive entering [preauth]
debug3: mm_request_receive entering
debug3: monitor_read: checking request 8
debug3: mm_answer_pwnamallow
debug2: parse_server_config: config reprocess config len 371
debug3: auth_shadow_acctexpired: today 18180 sp_expire -1 days left -18181
debug3: account expiration disabled
debug3: mm_answer_pwnamallow: sending MONITOR_ANS_PWNAM: 1
debug3: mm_request_send entering: type 9
debug2: monitor_read: 8 used once, disabling now
debug2: input_userauth_request: setting up authctxt for ubuntu [preauth]
debug3: mm_inform_authserv entering [preauth]
debug3: mm_request_send entering: type 4 [preauth]
debug2: input_userauth_request: try method none [preauth]
debug3: userauth_finish: failure partial=0 next methods="publickey,password" [preauth]
debug3: send packet: type 51 [preauth]
debug3: mm_request_receive entering
debug3: monitor_read: checking request 4
debug3: mm_answer_authserv: service=ssh-connection, style=, role=
debug2: monitor_read: 4 used once, disabling now
Connection closed by authenticating user ubuntu 10.20.30.3 port 42760 [preauth]
debug1: do_cleanup [preauth]
debug1: monitor_read_log: child log fd closed
debug3: mm_request_receive entering
debug1: do_cleanup
debug1: Killing privsep child 31423
debug1: audit_event: unhandled event 12
클라이언트 로그
$ ssh -vvv [email protected]
OpenSSH_7.2p2 Ubuntu-4ubuntu2.8, OpenSSL 1.0.2g 1 Mar 2016
debug1: Reading configuration data /home/clientuser/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: resolving "10.20.30.2" port 22
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to 10.20.30.2 [10.20.30.2] port 22.
debug1: Connection established.
debug1: identity file /home/clientuser/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /home/clientuser/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/clientuser/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/clientuser/.ssh/id_dsa-cert type -1
debug1: identity file /home/clientuser/.ssh/id_ecdsa type 3
debug1: key_load_public: No such file or directory
debug1: identity file /home/clientuser/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/clientuser/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/clientuser/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.8
debug1: Remote protocol version 2.0, remote software version SSH
debug1: no match: SSH
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to 10.20.30.2:22 as 'ubuntu'
debug3: hostkeys_foreach: reading file "/home/clientuser/.ssh/known_hosts"
debug3: record_hostkey: found key type RSA in file /home/clientuser/.ssh/known_hosts:252
debug3: load_hostkeys: loaded 1 keys from 10.20.30.2
debug3: order_hostkeyalgs: prefer hostkeyalgs: [email protected],rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug3: send packet: type 20
debug1: SSH2_MSG_KEXINIT sent
debug3: receive packet: type 20
debug1: SSH2_MSG_KEXINIT received
debug2: local client KEXINIT proposal
debug2: KEX algorithms: [email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,ext-info-c
debug2: host key algorithms: [email protected],rsa-sha2-512,rsa-sha2-256,ssh-rsa,[email protected],[email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519
debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],aes128-cbc,aes192-cbc,aes256-cbc,3des-cbc
debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],aes128-cbc,aes192-cbc,aes256-cbc,3des-cbc
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,[email protected],zlib
debug2: compression stoc: none,[email protected],zlib
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug2: peer server KEXINIT proposal
debug2: KEX algorithms: diffie-hellman-group-exchange-sha256,diffie-hellman-group1-sha1,diffie-hellman-group14-sha1
debug2: host key algorithms: ssh-rsa
debug2: ciphers ctos: aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,3des-cbc,arcfour
debug2: ciphers stoc: aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,3des-cbc,arcfour
debug2: MACs ctos: hmac-md5,hmac-md5-96,hmac-sha1,hmac-sha1-96,hmac-sha2-256,hmac-sha2-512
debug2: MACs stoc: hmac-md5,hmac-md5-96,hmac-sha1,hmac-sha1-96,hmac-sha2-256,hmac-sha2-512
debug2: compression ctos: none
debug2: compression stoc: none
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug1: kex: algorithm: diffie-hellman-group-exchange-sha256
debug1: kex: host key algorithm: ssh-rsa
debug1: kex: server->client cipher: aes128-ctr MAC: hmac-sha2-256 compression: none
debug1: kex: client->server cipher: aes128-ctr MAC: hmac-sha2-256 compression: none
debug3: send packet: type 34
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(2048<8192<8192) sent
debug3: receive packet: type 31
debug1: got SSH2_MSG_KEX_DH_GEX_GROUP
debug2: bits set: 4173/8192
debug3: send packet: type 32
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug3: receive packet: type 33
debug1: got SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: ssh-rsa SHA256:real_host_key_was_here
debug3: hostkeys_foreach: reading file "/home/clientuser/.ssh/known_hosts"
debug3: record_hostkey: found key type RSA in file /home/clientuser/.ssh/known_hosts:252
debug3: load_hostkeys: loaded 1 keys from 10.20.30.2
debug1: Host '10.20.30.2' is known and matches the RSA host key.
debug1: Found key in /home/clientuser/.ssh/known_hosts:252
debug2: bits set: 4062/8192
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey after 4294967296 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug3: receive packet: type 21
debug1: SSH2_MSG_NEWKEYS received
debug2: set_newkeys: mode 0
debug1: rekey after 4294967296 blocks
debug2: key: /home/clientuser/.ssh/id_rsa (0x55616bb74680), agent
debug2: key: /home/clientuser/.ssh/id_dsa ((nil))
debug2: key: /home/clientuser/.ssh/id_ecdsa (0x55616bb76e80)
debug2: key: /home/clientuser/.ssh/id_ed25519 ((nil))
debug3: send packet: type 5
debug3: receive packet: type 6
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug3: send packet: type 50
debug3: receive packet: type 51
debug1: Authentications that can continue: password
debug3: start over, passed a different list password
debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod_lookup password
debug3: remaining preferred: ,gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod_is_enabled password
debug1: Next authentication method: password
[email protected]'s password:
서버 sshd_config
# $OpenBSD: sshd_config,v 1.101 2017/03/14 07:19:07 djm Exp $
# This is the sshd server system-wide configuration file. See
# sshd_config(5) for more information.
# This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin
# The strategy used for options in the default sshd_config shipped with
# OpenSSH is to specify options with their default value where
# possible, but leave them commented. Uncommented options override the
# default value.
#Port 22
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::
#HostKey /etc/ssh/ssh_host_rsa_key
#HostKey /etc/ssh/ssh_host_ecdsa_key
#HostKey /etc/ssh/ssh_host_ed25519_key
# Ciphers and keying
#RekeyLimit default none
# Logging
#SyslogFacility AUTH
LogLevel DEBUG3
# Authentication:
#LoginGraceTime 2m
#PermitRootLogin prohibit-password
#StrictModes yes
#MaxAuthTries 6
#MaxSessions 10
PubkeyAuthentication yes
# Expect .ssh/authorized_keys2 to be disregarded by default in future.
AuthorizedKeysFile /home/%u/.ssh/authorized_keys
#AuthorizedPrincipalsFile none
#AuthorizedKeysCommand none
#AuthorizedKeysCommandUser nobody
# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
#HostbasedAuthentication no
# Change to yes if you don't trust ~/.ssh/known_hosts for
# HostbasedAuthentication
#IgnoreUserKnownHosts no
# Don't read the user's ~/.rhosts and ~/.shosts files
#IgnoreRhosts yes
# To disable tunneled clear text passwords, change to no here!
PasswordAuthentication yes
#PermitEmptyPasswords no
# Change to yes to enable challenge-response passwords (beware issues with
# some PAM modules and threads)
ChallengeResponseAuthentication no
# Kerberos options
#KerberosAuthentication no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
#KerberosGetAFSToken no
# GSSAPI options
#GSSAPIAuthentication no
#GSSAPICleanupCredentials yes
#GSSAPIStrictAcceptorCheck yes
#GSSAPIKeyExchange no
# Set this to 'yes' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
# be allowed through the ChallengeResponseAuthentication and
# PasswordAuthentication. Depending on your PAM configuration,
# PAM authentication via ChallengeResponseAuthentication may bypass
# the setting of "PermitRootLogin without-password".
# If you just want the PAM account and session checks to run without
# PAM authentication, then enable this but set PasswordAuthentication
# and ChallengeResponseAuthentication to 'no'.
UsePAM no
#AllowAgentForwarding yes
#AllowTcpForwarding yes
#GatewayPorts no
X11Forwarding yes
#X11DisplayOffset 10
#X11UseLocalhost yes
#PermitTTY yes
PrintMotd no
#PrintLastLog yes
#TCPKeepAlive yes
#UseLogin no
#PermitUserEnvironment no
#Compression delayed
#ClientAliveInterval 0
#ClientAliveCountMax 3
#UseDNS no
#PidFile /var/run/sshd.pid
#MaxStartups 10:30:100
#PermitTunnel no
#ChrootDirectory none
#VersionAddendum none
# no default banner path
#Banner none
# Allow client to pass locale environment variables
AcceptEnv LANG LC_*
# override default of no subsystems
Subsystem sftp /usr/lib/openssh/sftp-server
# Example of overriding settings on a per-user basis
#Match User anoncvs
# X11Forwarding no
# AllowTcpForwarding no
# PermitTTY no
# ForceCommand cvs server
권한 서버에서:
ubuntu@test-ubuntu:~$ ls -l /home/ | grep ubuntu
drwx------ 10 ubuntu ubuntu 4096 Oct 11 16:25 ubuntu
ubuntu@test-ubuntu:~$ ls -al ~ | grep .ssh
drwx------ 2 ubuntu ubuntu 4096 Oct 11 16:45 .ssh
ubuntu@test-ubuntu:~$ ls -l ~/.ssh | grep authorized_keys
-rw------- 1 ubuntu ubuntu 1194 Oct 11 16:46 authorized_keys
클라이언트 측에서:
clientuser@clienthost ~ $ ls -l /home | grep clientuser
drwx------ 88 clientuser clientuser 4096 Oct 11 11:30 clientuser
clientuser@clienthost ~ $ ls -la ~ | grep .ssh
drwx------ 3 clientuser clientuser 4096 Oct 11 11:46 .ssh
clientuser@clienthost ~ $ ls -l ~/.ssh | grep id_rsa
-rw------- 1 clientuser clientuser 1679 Feb 8 2018 id_rsa
-rw-r--r-- 1 clientuser clientuser 395 Feb 8 2018 id_rsa.pub
답변1
서버는 공개 키를 제공합니다.
debug3: userauth_finish: failure partial=0 next methods="publickey,password" [preauth]
debug3: send packet: type 51 [preauth]
그러나 고객은 다음과 같이 거절했습니다.
debug3: receive packet: type 51
debug1: Authentications that can continue: password
/etc/ssh/ssh_config
확인하다고객전역 구성) 확인
PubkeyAuthentication = yes
또한 이는 클라이언트측 문제인 것으로 보이므로 .ssh 및 내부의 모든 파일에 대한 올바른 권한을 얻어야 할 수도 있습니다.
답변2
공개 및 개인 키 세트를 생성할 때 여기에 비밀번호를 추가했습니까? 그렇다면 SSH를 통해 연결할 때 비밀번호를 묻는 메시지가 표시됩니다.
이 링크를 살펴보시기 바랍니다. https://askubuntu.com/questions/1019999/key-based-ssh-login-that-requires-both-key-and-password
답변3
지금,이것귀하의 특정 질문에 대한 답변이 아니라 귀하와 같은 혼란스러운 문제에 직면했을 때 제가 사용하는 접근 방식입니다. 이것은 다음의 사본입니다.AskUbuntu에 내가 쓴 답변.
이점은 다음과 같습니다.
- 더 빠른 "처리"...
-o OptionName=OptionValue
파일을 편집할 필요 없이 즉석에서 구성 옵션을 전달할 수 있습니다( )sshd_config
. - 당신이 사용할 수있는선택하다백업
sshd_config
(-f ...
). - SSH를 통해서만 원격 서버에 액세스할 수 있는 경우 대체 포트를 사용하면 서버가 잠길 위험을 줄일 수 있습니다.
문제 해결sshd
그러한 상황에서 내가 종종 매우 유용하다고 생각하는 것은 sshd
데몬화하지 않고 프로세스를 시작하는 것입니다. 내 문제는 의미있는 것을 아무것도 보여주지도 syslog
않는다는 것입니다 auth.log
.
터미널에서 실행하면 다음과 같은 결과가 나타납니다.
# $(which sshd) -Ddp 10222
/etc/ssh/sshd_config line 8: address family must be specified before ListenAddress.
훨씬 낫다! 이 오류 메시지를 통해 문제를 확인하고 해결할 수 있었습니다. 두 로그 파일 모두 이 출력을 포함하지 않습니다.
알아채다:적어도 Ubuntu에서는 이것이 $(which sshd)
절대 경로 요구 사항을 충족하는 가장 좋은 방법입니다. sshd
그렇지 않으면 다음 오류가 발생합니다: sshd re-exec requires execution with an absolute path
. 해당 대체 포트 -p 10222
에서 수신 대기 하도록 하려면 구성 파일을 재정의하십시오. 그러면 sshd
잠재적으로 실행 중인 인스턴스와 sshd
충돌 하지 않습니다. 여기서는 반드시 무료 포트를 선택하세요.
이 접근 방식은 인증 문제이든 다른 유형의 문제이든 여러 번 문제를 식별하는 데 도움이 되었습니다. 정말 자세한 출력을 위해서는 stdout
를 사용하세요 ( 자세한 내용을 늘리려면 $(which sshd) -Ddddp 10222
추가 항목을 참고하세요 ). dd
더 많은 디버깅 상태 확인을 확인하세요 man sshd
.