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Felix Delattre 2 years ago
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      README.md
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      files/authorized_keys
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      files/sshd_config
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      handlers/main.yml
  5. +40
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      tasks/main.yml

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README.md View File

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## SSH server

#### Preconfigured:

* Only connections with ssh key authentication are possible (no password login).
* `root` access is generally not allowed.
* Only users that are members of the `ssh_login` group can login through ssh.
* Port is switched from `22` to the indicated value in the [`data`/`.env`](../../data/.env,example) file.

#### You can connect directly with

`ssh -p 2222 user@123.456.789.1`

or use an alias in your `.ssh/config` (recommended):
```
Host asososca
Port 2222
User user
Hostname 123.456.789.1
```

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files/authorized_keys View File

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ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDCK9pi56wfuAoqSawoRJ9/qcuyyeaRsnHflKPiafWyhuBMkZYwQnhbmjuSgLIZyk4PoGSDsvgzAJC2sahxnaHV2b0R7rDTO803H0PU9ioMhsLy1XgC9+kDODnoOpTvrDFCD0dhES8vWi7RaaWZ7cYkXEvzfEypOhi4gzn6k8tXibVHdd/WosH4wuMNOBAFotmOBVScofyHgjiJc1HJ8GlHGVwV6dAH+a8ri4/rRvV6bvXo6EnRu4Z/00ixu+lAI59KHA1iRvI4dwTVGVDZPn+wxKzcxZq/J3VcpDlvQwm+TwhjyK3Qk2gIN2jbvr4GvuaZb1ECM5qEXCUu2lfQB43f felix@delattre.de

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files/sshd_config View File

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# $OpenBSD: sshd_config,v 1.100 2016/08/15 12:32:04 naddy 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 2222
#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 INFO

# Authentication:

LoginGraceTime 2m
PermitRootLogin no
AllowGroups ssh_login
#StrictModes yes
#MaxAuthTries 6
#MaxSessions 10

#PubkeyAuthentication yes

# Expect .ssh/authorized_keys2 to be disregarded by default in future.
#AuthorizedKeysFile .ssh/authorized_keys .ssh/authorized_keys2

#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 no
#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 yes

#AllowAgentForwarding yes
#AllowTcpForwarding yes
#GatewayPorts no
X11Forwarding no
#X11DisplayOffset 10
#X11UseLocalhost yes
#PermitTTY yes
PrintMotd no
#PrintLastLog yes
#TCPKeepAlive yes
#UseLogin no
#UsePrivilegeSeparation sandbox
#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

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handlers/main.yml View File

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---
- name: restart ssh
service:
name: ssh
state: restarted

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tasks/main.yml View File

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---
- name: Install tools for remote access
apt: name={{ item }} state=present
with_items:
- openssh-server

- group:
name: ssh_login
state: present

- name: Adding existing user to group ssh_login
user: name=user
groups=ssh_login
append=yes


- name: Make sure that the .ssh directory exsists
file:
path: "/home/user/.ssh"
state: directory
mode: 0755

- name: copy authorized_keys file
copy:
src: files/authorized_keys
dest: "/home/user/.ssh/authorized_keys"
owner: user
group: user
mode: 0644

- name: Secured ssh configuration (will change port to 54646)
copy:
src: "files/sshd_config"
dest: /etc/ssh/sshd_config
owner: root
group: root
mode: 0644
backup: yes
notify:
- restart ssh

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