我试图通过SSH将根访问和密码authentication移除到RHEL服务器，以便所有用户必须使用密钥访问它。 到目前为止，关键访问被设置和工作，但我无法closures全面的密码authentication或禁用root帐户。
下面是我的/ etc / ssh / sshd_config文件中未注释的行 – 我是否在某处丢失了某些东西？ 我的印象是，所有需要禁用root帐户的是将PermitRootLogin从“yes”切换到“no”，并重新启动sshd，这一点我已经完成了。
ssh -vvv的输出也粘贴在下面 – 在我看来，这里没有应用sshd_config设置。 任何帮助或build议将不胜感激。
编辑：我现在也贴了rpm-qa | grep -i ssh的输出 rpm-qa | grep -i ssh ， grep "# config:" /etc/init.d/sshd / strings $(which sshd) | grep -i "sshd_config"和strings $(which sshd) | grep -i "sshd_config" strings $(which sshd) | grep -i "sshd_config"
grep“＃config：”/etc/init.d/sshd
# config: /etc/ssh/ssh_host_key # config: /etc/ssh/ssh_host_key.pub # config: /etc/ssh/ssh_random_seed # config: /etc/ssh/sshd_config
string$（其中sshd）| grep -i“sshd_config”
/usr/sbin/sshx/etc/sshd_config (this file contains only one uncommented line - Subsystem sftp /usr/sbin/sshx/libexec/sftp-server)
rpm -qa | grep -i ssh
openssh-clients-4.3p2-36.el5_4.4 openssh-server-4.3p2-36.el5_4.4 openssh-4.3p2-36.el5_4.4
的/ etc / SSH / sshd_config中
Protocol 2 SyslogFacility AUTHPRIV PermitRootLogin no RSAAuthentication yes PubkeyAuthentication yes AuthorizedKeysFile .ssh/authorized_keys PasswordAuthentication no ChallengeResponseAuthentication no GSSAPIAuthentication yes GSSAPICleanupCredentials yes UsePAM no AcceptEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES AcceptEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT AcceptEnv LC_IDENTIFICATION LC_ALL X11Forwarding yes Subsystem sftp /usr/libexec/openssh/sftp-server
ssh -vvv输出（IP被移除）
OpenSSH_5.6p1, OpenSSL 0.9.8r 8 Feb 2011 debug1: Reading configuration data /Users/user/.ssh/config debug1: Reading configuration data /etc/ssh_config debug1: Applying options for * debug2: ssh_connect: needpriv 0 debug1: Connecting to *.*.*.* [*.*.*.*] port 22. debug1: Connection established. debug3: Not a RSA1 key file /Users/user/.ssh/id_rsa. debug2: key_type_from_name: unknown key type '-----BEGIN' debug3: key_read: missing keytype debug2: key_type_from_name: unknown key type 'Proc-Type:' debug3: key_read: missing keytype debug2: key_type_from_name: unknown key type 'DEK-Info:' debug3: key_read: missing keytype debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug2: key_type_from_name: unknown key type '-----END' debug3: key_read: missing keytype debug1: identity file /Users/user/.ssh/id_rsa type 1 debug1: identity file /Users/user/.ssh/id_rsa-cert type -1 debug1: identity file /Users/user/.ssh/id_dsa type -1 debug1: identity file /Users/user/.ssh/id_dsa-cert type -1 debug1: Remote protocol version 1.99, remote software version OpenSSH_33.33 debug1: match: OpenSSH_33.33 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.6 debug2: fd 3 setting O_NONBLOCK debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected] debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected] debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,[email protected],zlib debug2: kex_parse_kexinit: none,[email protected],zlib debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,[email protected] debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,[email protected] debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,zlib debug2: kex_parse_kexinit: none,zlib debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: mac_setup: found hmac-md5 debug1: kex: server->client aes128-cbc hmac-md5 none debug2: mac_setup: found hmac-md5 debug1: kex: client->server aes128-cbc hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug2: dh_gen_key: priv key bits set: 123/256 debug2: bits set: 514/1024 debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug3: check_host_in_hostfile: host *.*.*.* filename /Users/user/.ssh/known_hosts debug3: check_host_in_hostfile: host *.*.*.* filename /Users/user/.ssh/known_hosts debug3: check_host_in_hostfile: match line 20 debug1: Host '*.*.*.*' is known and matches the RSA host key. debug1: Found key in /Users/user/.ssh/known_hosts:20 debug2: bits set: 507/1024 debug1: ssh_rsa_verify: signature correct debug2: kex_derive_keys debug2: set_newkeys: mode 1 debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug2: set_newkeys: mode 0 debug1: SSH2_MSG_NEWKEYS received debug1: Roaming not allowed by server debug1: SSH2_MSG_SERVICE_REQUEST sent debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: /Users/user/.ssh/id_rsa (0x7ff728c241f0) debug2: key: /Users/user/.ssh/id_dsa (0x0) debug1: Authentications that can continue: publickey,password,keyboard-interactive debug3: start over, passed a different list publickey,password,keyboard-interactive debug3: preferred publickey,keyboard-interactive,password debug3: authmethod_lookup publickey debug3: remaining preferred: keyboard-interactive,password debug3: authmethod_is_enabled publickey debug1: Next authentication method: publickey debug1: Offering RSA public key: /Users/user/.ssh/id_rsa debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply debug1: Authentications that can continue: publickey,password,keyboard-interactive debug1: Trying private key: /Users/user/.ssh/id_dsa debug3: no such identity: /Users/user/.ssh/id_dsa debug2: we did not send a packet, disable method debug3: authmethod_lookup keyboard-interactive debug3: remaining preferred: password debug3: authmethod_is_enabled keyboard-interactive debug1: Next authentication method: keyboard-interactive debug2: userauth_kbdint debug2: we sent a keyboard-interactive packet, wait for reply debug1: Authentications that can continue: publickey,password,keyboard-interactive debug3: userauth_kbdint: disable: no info_req_seen debug2: we did not send a packet, disable method debug3: authmethod_lookup password debug3: remaining preferred: debug3: authmethod_is_enabled password debug1: Next authentication method: password root@*.*.*.*'s password: debug3: packet_send2: adding 48 (len 63 padlen 17 extra_pad 64) debug2: we sent a password packet, wait for reply debug1: Authentication succeeded (password). Authenticated to *.*.*.* ([*.*.*.*]:22). debug1: channel 0: new [client-session] debug3: ssh_session2_open: channel_new: 0 debug2: channel 0: send open debug1: Requesting [email protected] debug1: Entering interactive session. debug2: callback start debug2: client_session2_setup: id 0 debug2: channel 0: request pty-req confirm 1 debug1: Sending environment. debug3: Ignored env rvm_dump_environment_flag debug3: Ignored env rvm_bin_path debug3: Ignored env TERM_PROGRAM debug3: Ignored env rvm_clang_flag debug3: Ignored env TERM debug3: Ignored env SHELL debug3: Ignored env TMPDIR debug3: Ignored env Apple_PubSub_Socket_Render debug3: Ignored env TERM_PROGRAM_VERSION debug3: Ignored env TERM_SESSION_ID debug3: Ignored env rvm_verbose_flag debug3: Ignored env USER debug3: Ignored env COMMAND_MODE debug3: Ignored env __array_start debug3: Ignored env rvm_path debug3: Ignored env rvm_debug_flag debug3: Ignored env SSH_AUTH_SOCK debug3: Ignored env __CF_USER_TEXT_ENCODING debug3: Ignored env Apple_Ubiquity_Message debug3: Ignored env escape_flag debug3: Ignored env rvm_prefix debug3: Ignored env PATH debug3: Ignored env PWD debug1: Sending env LANG = en_GB.UTF-8 debug2: channel 0: request env confirm 0 debug3: Ignored env _second debug3: Ignored env rvm_version debug3: Ignored env SHLVL debug3: Ignored env HOME debug3: Ignored env _first debug3: Ignored env LOGNAME debug3: Ignored env rvm_reload_flag debug3: Ignored env DISPLAY debug3: Ignored env SECURITYSESSIONID debug3: Ignored env _ debug2: channel 0: request shell confirm 1 debug2: fd 3 setting TCP_NODELAY debug2: callback done debug2: channel 0: open confirm rwindow 0 rmax 32768 debug2: channel_input_status_confirm: type 99 id 0 debug2: PTY allocation request accepted on channel 0 debug2: channel 0: rcvd adjust 131072 debug2: channel_input_status_confirm: type 99 id 0 debug2: shell request accepted on channel 0
你重新加载或重新启动sshd？ 否则，您的sshd仍可能使用旧的设置。
运行strings $(which sshd) | grep -i "sshd_config" strings $(which sshd) | grep -i "sshd_config"find/usr/sbin/sshx/etc/sshd_config
configuration更改为这个文件已经工作。 至于为什么sshd使用这个文件，我相信是另一个问题。 感谢您的帮助。
尝试添加
DenyUser root
这将阻止根login通过SSH。
AllowUser jack jill
也会限制谁通过SSHlogin。