aboutsummaryrefslogtreecommitdiff
path: root/README.md
blob: 0ae195e6a0c14c0864aaae1e6978453ce822a969 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
# Puppet SSH Module

[![Build Status](https://travis-ci.org/duritong/puppet-sshd.png?branch=master)](https://travis-ci.org/duritong/puppet-sshd)

This puppet module manages OpenSSH configuration and services.

**!! Upgrade Notice (01/2013) !!**

This module now uses parameterized classes, where it used global variables
before. So please whatch out before pulling, you need to change the
class declarations in your manifest !


### Dependencies

This module requires puppet => 2.6, and the following modules are required
pre-dependencies:

- [puppetlabs/stdlib](https://github.com/puppetlabs/puppetlabs-stdlib) >= 2.x

## OpenSSH Server

On a node where you wish to have an openssh server installed, you should
include

```puppet
class { 'sshd': }
```

on that node. If you need to configure any aspects of sshd_config, set the variables before the include. Or you can adjust many parameters:

```puppet
class { 'sshd':
  ports             => [ 20002 ],
  permit_root_login => 'no',
}
```

See Configurable Variables below for what you can set.

### Nagios

To have nagios checks setup automatically for sshd services, simply set
`manage_nagios` to `true` for that class. If you want to disable ssh
nagios checking for a particular node (such as when ssh is firewalled), then you
can set the class parameter `nagios_check_ssh` to `false` and that node will not be
monitored.

Nagios will automatically check the ports defined in `ports`, and the
hostname specified by `nagios_check_ssh_hostname`.

NOTE: this requires that you are using the shared-nagios puppet module which
supports the nagios native types via `nagios::service`:
git://labs.riseup.net/shared-nagios

### Firewall

If you wish to have firewall rules setup automatically for you, using shorewall,
you will need to set: `use_shorewall => true`. The `ports` that you have
specified will automatically be used.

NOTE: This requires that you are using the shared-shorewall puppet module:
git://labs.riseup.net/shared-shorewall


### Configurable variables

Configuration of sshd is strict, and may not fit all needs, however there are a
number of variables that you can consider configuring. The defaults are set to
the distribution shipped sshd_config file defaults.

To set any of these variables, simply set them as variables in your manifests,
before the class is included, for example:

```puppet
class {'sshd':
  listen_address => ['10.0.0.1', '192.168.0.1'],
  use_pam        => yes
}
```

If you need to install a version of the ssh daemon or client package other than
the default one that would be installed by `ensure => installed`, then you can
set the following variables:

```puppet
class {'sshd':
  ensure_version => "1:5.2p2-6"
}
```

The following is a list of the currently available variables:

  - `listen_address`
        specify the addresses sshd should listen on set this to `['10.0.0.1', '192.168.0.1']` to have it listen on both addresses, or leave it unset to listen on all Default: empty -> results in listening on `0.0.0.0`
  - `allowed_users`
    list of usernames separated by spaces.  set this for example to `"foobar
    root"` to ensure that only user foobar and root might login.  Default: empty
    -> no restriction is set
  - `allowed_groups`
    list of groups separated by spaces. set this for example to `"wheel sftponly"`
    to ensure that only users in the groups wheel and sftponly might login.
    Default: empty -> no restriction is set Note: This is set after
    `allowed_users`, take care of the behaviour if you use these 2 options
    together.
  - `use_pam` if you want to use pam or not for authenticaton. Values:
    - `no` (default)
    - `yes`
  - `permit_root_login` If you want to allow root logins or not. Valid values:
    - `yes`
    - `no`
    - `without-password` (default)
    - `forced-commands-only`
  - `password_authentication`
    If you want to enable password authentication or not. Valid values:
    - `yes`
    - `no` (default)
  - `kerberos_authentication`
    If you want the password that is provided by the user to be validated
    through the Kerberos KDC. To use this option the server needs a Kerberos
    servtab which allows the verification of the KDC's identity. Valid values:
    - `yes`
    - `no` (default)
  - `kerberos_orlocalpasswd` If password authentication through Kerberos fails, then the password will be validated via any additional local mechanism.  Valid values:
    - `yes` (default)
    - `no`
  - `kerberos_ticketcleanup` Destroy the user's ticket cache file on logout?  Valid values:
    - `yes` (default)
    - `no`
  - `gssapi_authentication` Authenticate users based on GSSAPI? Valid values:
    - `yes`
    - `no` (default)
  - `gssapi_cleanupcredentials` Destroy user's credential cache on logout? Valid values:
    - `yes` (default)
    - `no`
  - `challenge_response_authentication` If you want to enable ChallengeResponseAuthentication or not When disabled, s/key passwords are disabled. Valid values:
    - `yes`
    - `no` (default)
  - `tcp_forwarding` If you want to enable TcpForwarding. Valid values:
    - `yes`
    - `no` (default)
  - `x11_forwarding` If you want to enable x11 forwarding. Valid values:
    - `yes`
    - `no` (default)
  - `agent_forwarding` If you want to allow ssh-agent forwarding. Valid values:
    - `yes`
    - `no` (default)
  - `pubkey_authentication` If you want to enable public key authentication. Valid values:
    - `yes` (default)
    - `no`
  - `rsa_authentication` If you want to enable RSA Authentication. Valid values:
    - `yes`
    - `no` (default)
  - `rhosts_rsa_authentication`
    If you want to enable rhosts RSA Authentication. Valid values:
    - `yes`
    - `no` (default)
  - `hostbased_authentication` If you want to enable `HostbasedAuthentication`. Valid values:
    - `yes`
    - `no` (default)
  - `strict_modes` If you want to set `StrictModes` (check file modes/ownership before accepting login). Valid values:
    - `yes` (default)
    - `no`
  - `permit_empty_passwords`
    If you want enable PermitEmptyPasswords to allow empty passwords. Valid
    Values:
    - `yes`
    - `no` (default)
  - `ports` If you want to specify a list of ports other than the default `22`; Default: `[22]`
  - `authorized_keys_file`
    Set this to the location of the AuthorizedKeysFile
    (e.g. `/etc/ssh/authorized_keys/%u`). Default: `AuthorizedKeysFile
    %h/.ssh/authorized_keys`
  - `hardened_ssl`
    Use only strong SSL ciphers and MAC.
    Values:
    - `no` (default)
    - `yes`
  - `print_motd`
    Show the Message of the day when a user logs in.
  - `sftp_subsystem`
    Set a different sftp-subystem than the default one. Might be interesting for
    sftponly usage. Default: empty -> no change of the default
  - `head_additional_options`
    Set this to any additional sshd_options which aren't listed above. Anything
    set here will be added to the beginning of the sshd_config file. This option
    might be useful to define complicated Match Blocks. This string is going to
    be included, like it is defined. So take care! Default: empty -> not added.
  - `tail_additional_options` Set this to any additional sshd_options which aren't listed above. Anything set here will be added to the end of the sshd_config file. This option might be useful to define complicated Match Blocks. This string is going to be included, like it is defined. So take care! Default: empty -> not added.
  - `shared_ip` Whether the server uses a shared network IP address. If it does, then we don't want it to export an rsa key for its IP address. Values:
  - `no` (default)
  - `yes`


### Defines and functions

Deploy authorized_keys file with the define `authorized_key`.

Generate a public/private keypair with the ssh_keygen function. For example, the
following will generate ssh keys and put the different parts of the key into
variables:

```puppet
$ssh_keys = ssh_keygen("${$ssh_key_basepath}/backup/keys/${::fqdn}/${backup_host}")
$public_key = split($ssh_keys[1],' ')
$sshkey_type => $public_key[0]
$sshkey => $public_key[1]
```

## Client


On a node where you wish to have the ssh client managed, you can do:

```puppet
class{'sshd::client':

}
```

in the node definition. This will install the appropriate package.

## License

 - Copyright 2008-2011, Riseup Labs micah@riseup.net
 - Copyright 2008, admin(at)immerda.ch
 - Copyright 2008, Puzzle ITC GmbH
 - Marcel Härry haerry+puppet(at)puzzle.ch
 - Simon Josi josi+puppet(at)puzzle.ch

This program is free software; you can redistribute
it and/or modify it under the terms of the GNU
General Public License version 3 as published by
the Free Software Foundation.