62b1150e29
Local OpenLDAP and WAD servers are being used for k8s api and SSH authentication. We need the ability to disallow SSH authentication for selective users. As part of the solution, we create a Linux group where all ldap users with "denied ssh access" will be added. This commit sets the group for "denied ssh access" in the sshd configuration file "/etc/ssh/sshd_config". Test Plan: PASS: Debian image gets successfully installed in AIO-SX system. PASS: Verify the Linux group has been created and the sshd configuration file was updated with denied ssh access for that group. PASS: Create an openldap user and add to the "deny ssh access" group. Verify that the user cannot ssh. PASS: Create a WAD group with the same name and gidNumber as the Linux group for "deny ssh access". Create a WAD user in this group. Validate that the new WAD user in the "deny ssh group" cannot ssh to stx platform. PASS: Remove the WAD user from the WAD "deny ssh access" group. Validate that now the user can have ssh access to stx platform. PASS: Remove the openldap user from the Linux "deny ssh access" group. Validate that now the user can have ssh access to stx platform. Story: 2010589 Task: 48231 Depends-On: https://review.opendev.org/c/starlingx/stx-puppet/+/886150 Signed-off-by: Carmen Rata <carmen.rata@windriver.com> Change-Id: If96f3f52cb10a8c32df5b777ba7c85f33edb3f96
150 lines
4.8 KiB
Plaintext
150 lines
4.8 KiB
Plaintext
# $OpenBSD: sshd_config,v 1.100 2016/08/15 12:32:04 naddy Exp $
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# This is the sshd server system-wide configuration file. See
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# sshd_config(5) for more information.
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# This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin
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# The strategy used for options in the default sshd_config shipped with
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# OpenSSH is to specify options with their default value where
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# possible, but leave them commented. Uncommented options override the
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# default value.
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# If you want to change the port on a SELinux system, you have to tell
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# SELinux about this change.
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# semanage port -a -t ssh_port_t -p tcp #PORTNUMBER
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#
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#Port 22
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#AddressFamily any
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#ListenAddress 0.0.0.0
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#ListenAddress ::
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HostKey /etc/ssh/ssh_host_rsa_key
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#HostKey /etc/ssh/ssh_host_dsa_key
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HostKey /etc/ssh/ssh_host_ecdsa_key
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HostKey /etc/ssh/ssh_host_ed25519_key
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# Ciphers and keying
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RekeyLimit default 1h
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# Logging
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#SyslogFacility AUTH
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#SyslogFacility AUTHPRIV
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LogLevel INFO
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# Authentication:
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LoginGraceTime 1m
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PermitRootLogin no
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#StrictModes yes
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MaxAuthTries 4
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#MaxSessions 10
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#PubkeyAuthentication yes
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# The default is to check both .ssh/authorized_keys and .ssh/authorized_keys2
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# but this is overridden so installations will only check .ssh/authorized_keys
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AuthorizedKeysFile .ssh/authorized_keys
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#AuthorizedPrincipalsFile none
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#AuthorizedKeysCommand none
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#AuthorizedKeysCommandUser nobody
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# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
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#HostbasedAuthentication no
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# Change to yes if you don't trust ~/.ssh/known_hosts for
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# HostbasedAuthentication
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IgnoreUserKnownHosts yes
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# Don't read the user's ~/.rhosts and ~/.shosts files
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#IgnoreRhosts yes
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# To disable tunneled clear text passwords, change to no here!
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#PasswordAuthentication yes
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PermitEmptyPasswords no
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PasswordAuthentication yes
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# Change to no to disable s/key passwords
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#ChallengeResponseAuthentication yes
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ChallengeResponseAuthentication no
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# Kerberos options
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#KerberosAuthentication no
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#KerberosOrLocalPasswd yes
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#KerberosTicketCleanup yes
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#KerberosGetAFSToken no
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#KerberosUseKuserok yes
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# GSSAPI options
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GSSAPIAuthentication no
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GSSAPICleanupCredentials yes
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#GSSAPIStrictAcceptorCheck yes
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#GSSAPIKeyExchange no
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#GSSAPIEnablek5users no
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# Set this to 'yes' to enable PAM authentication, account processing,
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# and session processing. If this is enabled, PAM authentication will
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# be allowed through the ChallengeResponseAuthentication and
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# PasswordAuthentication. Depending on your PAM configuration,
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# PAM authentication via ChallengeResponseAuthentication may bypass
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# the setting of "PermitRootLogin without-password".
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# If you just want the PAM account and session checks to run without
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# PAM authentication, then enable this but set PasswordAuthentication
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# and ChallengeResponseAuthentication to 'no'.
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# WARNING: 'UsePAM no' is not supported in Red Hat Enterprise Linux and may cause several
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# problems.
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UsePAM yes
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AllowAgentForwarding no
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AllowTcpForwarding no
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#GatewayPorts no
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X11Forwarding no
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#X11DisplayOffset 10
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#X11UseLocalhost yes
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#PermitTTY yes
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#PrintMotd yes
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PrintLastLog yes
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#TCPKeepAlive yes
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#UseLogin no
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UsePrivilegeSeparation sandbox
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PermitUserEnvironment no
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Compression no
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ClientAliveInterval 15
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ClientAliveCountMax 4
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#ShowPatchLevel no
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# Make SSH connect faster on bootup
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UseDNS no
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#PidFile /var/run/sshd.pid
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#MaxStartups 10:30:100
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#PermitTunnel no
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#ChrootDirectory none
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#VersionAddendum none
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# default banner path
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Banner /etc/issue.net
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# Accept locale-related environment variables
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AcceptEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES
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AcceptEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT
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AcceptEnv LC_IDENTIFICATION LC_ALL LANGUAGE
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AcceptEnv XMODIFIERS
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# override default of no subsystems
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Subsystem sftp /usr/lib/openssh/sftp-server
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# Example of overriding settings on a per-user basis
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#Match User anoncvs
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# X11Forwarding no
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# AllowTcpForwarding no
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# PermitTTY no
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# ForceCommand cvs server
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DenyUsers admin secadmin operator
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DenyGroups denyssh
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# Filtered cipher, MAC and key exchange algorithm list, defaults can be
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# obtained by ssh -Q cipher, ssh -Q mac and ssh -Q kex
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# TODO (aning): once openssh is updated to 7.5, an explicit exclusion list
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# using "-" should be used for cipher, MAC and kex excluded suites.
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Ciphers aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com
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MACs hmac-sha1,hmac-sha2-256,hmac-sha2-512,umac-64@openssh.com,umac-128@openssh.com,hmac-sha1-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com
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KexAlgorithms curve25519-sha256,curve25519-sha256@libssh.org,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
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