14 files changed, 547 insertions, 0 deletions
diff --git a/roles/common/README b/roles/common/README
new file mode 100644
index 0000000..b43cb11
--- /dev/null
+++ b/roles/common/README
@@ -0,0 +1,4 @@
+Many of the files in here originally came from the 'jessie' branch of
+sovereign:
+
+    https://github.com/sovereign/sovereign
diff --git a/roles/common/defaults/main.yml b/roles/common/defaults/main.yml
new file mode 100644
index 0000000..22287b0
--- /dev/null
+++ b/roles/common/defaults/main.yml
@@ -0,0 +1,36 @@
+---
+###############################################################################
+# DO NOT EDIT. Set your variables in `vars/*.yml` instead.
+# This is a reference of all the variables.
+###############################################################################
+
+common_timezone: 'Etc/UTC'
+# domain: (required)
+# main_user_name: (required)
+# admin_email: (required)
+main_user_shell: "/bin/bash"
+friendly_networks:
+  - ""
+
+# ssh
+ssh_kex_algorithms: "diffie-hellman-group-exchange-sha256"
+ssh_ciphers: "aes256-ctr,aes192-ctr,aes128-ctr"
+ssh_macs: "hmac-sha2-512,hmac-sha2-256,hmac-ripemd160"
+sshd_allow_passwd: "no"
+sshd_print_motd: "yes"
+sshd_allow_root: "without-password"
+sshd_forward_x11: "yes"
+
+# ntp
+ntp_servers:
+  # use nearby ntp servers by default
+  - 0.pool.ntp.org
+  - 1.pool.ntp.org
+  - 2.pool.ntp.org
+  - 3.pool.ntp.org
+  # use servers tailored to the server location
+  # See http://www.pool.ntp.org/en/use.html
+  # - 0.north-america.pool.ntp.org
+  # - 1.north-america.pool.ntp.org
+  # - 2.north-america.pool.ntp.org
+  # - 3.north-america.pool.ntp.org
diff --git a/roles/common/handlers/main.yml b/roles/common/handlers/main.yml
new file mode 100644
index 0000000..3ca3bcf
--- /dev/null
+++ b/roles/common/handlers/main.yml
@@ -0,0 +1,11 @@
+---
+# Defines handlers applicable across all machines in the infrastructure.
+
+- name: restart ntp
+  service: name=ntp state=restarted
+
+- name: restart fail2ban
+  service: name=fail2ban state=restarted
+
+- name: restart ssh
+  service: name=ssh state=restarted
diff --git a/roles/common/tasks/extras.yml b/roles/common/tasks/extras.yml
new file mode 100644
index 0000000..9a4bd2f
--- /dev/null
+++ b/roles/common/tasks/extras.yml
@@ -0,0 +1,12 @@
+---
+- name: Install extras that Everybody wants
+  apt: pkg={{ item }} state=installed
+  with_items:
+    - build-essential
+    - cowsay
+    - figlet
+    - ipython
+    - ipython3
+  tags:
+    - dependencies
+
diff --git a/roles/common/tasks/main.yml b/roles/common/tasks/main.yml
new file mode 100644
index 0000000..d4c2347
--- /dev/null
+++ b/roles/common/tasks/main.yml
@@ -0,0 +1,90 @@
+---
+
+- name: Update apt cache
+  apt: update_cache=yes cache_valid_time=3600
+  tags:
+    - dependencies
+
+- name: Upgrade all safe packages
+  apt: upgrade=safe
+  tags:
+    - dependencies
+
+- name: Install necessities and nice-to-haves
+  apt: pkg={{ item }} state=installed
+  with_items:
+    - apt-transport-https
+    - apticron
+    - aptitude
+    - bzip2
+    - ca-certificates
+    - curl
+    - debian-goodies
+    - dialog
+    - dnsutils
+    - etckeeper
+    # fail2ban in security
+    - file
+    - git
+    - htop
+    - iftop
+    - ifupdown
+    - iotop
+    - iproute
+    - iputils-ping
+    - isc-dhcp-client
+    - less
+    - libui-dialog-perl
+    - locales
+    - locales-all
+    - lsof
+    - lvm2
+    - man-db
+    - manpages-dev
+    - molly-guard
+    - mosh
+    - mtr-tiny
+    - netbase
+    - netcat
+    - net-tools
+    - ngrep
+    - openssh-server
+    - openssl
+    - pv
+    - python
+    - python-software-properties
+    # rkhunter in security
+    - screen
+    - sudo
+    - tcpdump
+    - unzip
+    - unattended-upgrades
+    - vim-nox
+    - wget
+  tags:
+    - dependencies
+
+- name: timezone - configure /etc/timezone
+  copy:
+    content: "{{ common_timezone | regex_replace('$', '\n') }}"
+    dest: /etc/timezone
+    owner: root
+    group: root
+    mode: 0644
+  register: common_timezone_config
+
+- name: timezone - Set localtime to UTC
+  file: src=/usr/share/zoneinfo/Etc/UTC dest=/etc/localtime
+  when: common_timezone_config.changed
+
+- name: timezone - reconfigure tzdata
+  command: dpkg-reconfigure --frontend noninteractive tzdata
+  when: common_timezone_config.changed
+
+- name: Apticron email configuration
+  template: src=apticron.conf.j2 dest=/etc/apticron/apticron.conf
+
+#- include: users.yml tags=users
+- include: security.yml tags=security
+- include: ntp.yml tags=ntp
+- include: extras.yml tags=extras
diff --git a/roles/common/tasks/ntp.yml b/roles/common/tasks/ntp.yml
new file mode 100644
index 0000000..c1489fd
--- /dev/null
+++ b/roles/common/tasks/ntp.yml
@@ -0,0 +1,16 @@
+---
+# Defines tasks applicable for NTP (Network Time Protocol)
+
+- name: Install ntp
+  apt: pkg=ntp state=installed
+  tags:
+    - dependencies
+
+- name: Configure ntp
+  template: src=ntp.conf.j2 dest=/etc/ntp.conf
+  notify:
+    - restart ntp
+
+- name: Ensure ntpd is running and enabled
+  service: name=ntp state=started enabled=yes
+
diff --git a/roles/common/tasks/security.yml b/roles/common/tasks/security.yml
new file mode 100644
index 0000000..c00b941
--- /dev/null
+++ b/roles/common/tasks/security.yml
@@ -0,0 +1,26 @@
+---
+- name: Install security-related packages
+  apt: pkg={{ item }} state=installed
+  with_items:
+    - fail2ban
+    - whois
+    - lynis
+    - rkhunter
+    - debsums
+  tags:
+    - dependencies
+
+- name: Copy fail2ban configuration into place
+  template: src=etc_fail2ban_jail.local.j2 dest=/etc/fail2ban/jail.local
+  notify: restart fail2ban
+
+- name: Ensure fail2ban is started
+  service: name=fail2ban state=started enabled=yes
+
+- name: Update sshd (server) config for PFS and more secure defaults
+  template: src=etc_ssh_sshd_config.j2 dest=/etc/ssh/sshd_config
+  notify: restart ssh
+
+- name: Update ssh (client) config for more secure defaults
+  template: src=etc_ssh_ssh_config.j2 dest=/etc/ssh/ssh_config
+
diff --git a/roles/common/tasks/users.yml b/roles/common/tasks/users.yml
new file mode 100644
index 0000000..8171bd6
--- /dev/null
+++ b/roles/common/tasks/users.yml
@@ -0,0 +1,6 @@
+---
+- name: Create main user account
+  user: name={{ main_user_name }} state=present shell={{ main_user_shell }} groups=sudo
+
+- name: Give main user account sudo power
+  template: src=roles/common/templates/sudoers.j2 dest=/etc/sudoers.d/sudoers owner=root group=root mode=0440 validate='visudo -cf %s'
diff --git a/roles/common/templates/apticron.conf.j2 b/roles/common/templates/apticron.conf.j2
new file mode 100644
index 0000000..512a682
--- /dev/null
+++ b/roles/common/templates/apticron.conf.j2
@@ -0,0 +1,101 @@
+# apticron.conf
+# {{ ansible_managed }}
+#
+# set EMAIL to a space separated list of addresses which will be notified of
+# impending updates
+#
+EMAIL="{{ admin_email }}"
+
+#
+# Set DIFF_ONLY to "1" to only output the difference of the current run
+# compared to the last run (ie. only new upgrades since the last run). If there
+# are no differences, no output/email will be generated. By default, apticron
+# will output everything that needs to be upgraded.
+#
+# DIFF_ONLY="1"
+
+#
+# Set LISTCHANGES_PROFILE if you would like apticron to invoke apt-listchanges
+# with the --profile option. You should add a corresponding profile to
+# /etc/apt/listchanges.conf
+#
+# LISTCHANGES_PROFILE="apticron"
+
+#
+# From hostname manpage: "Displays  all FQDNs of the machine. This option
+# enumerates all configured network addresses on all configured network inter‐
+# faces, and translates them to DNS domain names. Addresses that cannot be
+# translated (i.e. because they do not have an appro‐ priate  reverse DNS
+# entry) are skipped. Note that different addresses may resolve to the same
+# name, therefore the output may contain duplicate entries. Do not make any
+# assumptions about the order of the output."
+#
+# ALL_FQDNS="1"
+
+#
+# Set SYSTEM if you would like apticron to use something other than the output
+# of "hostname -f" for the system name in the mails it generates. This option
+# overrides the ALL_FQDNS above.
+#
+# SYSTEM="foobar.example.com"
+
+#
+# Set IPADDRESSNUM if you would like to configure the maximal number of IP
+# addresses apticron displays. The default is to display 1 address of each
+# family type (inet, inet6), if available.
+#
+# IPADDRESSNUM="1"
+
+#
+# Set IPADDRESSES to a whitespace separated list of reachable addresses for
+# this system. By default, apticron will try to work these out using the
+# "ip" command
+#
+# IPADDRESSES="192.0.2.1 2001:db8:1:2:3::1"
+
+#
+# Set NOTIFY_HOLDS="0" if you don't want to be notified about new versions of
+# packages on hold in your system. The default behavior is downloading and
+# listing them as any other package.
+#
+# NOTIFY_HOLDS="0"
+
+#
+# Set NOTIFY_NEW="0" if you don't want to be notified about packages which
+# are not installed in your system. Yes, it's possible! There are some issues
+# related to systems which have mixed stable/unstable sources. In these cases
+# apt-get will consider for example that packages with "Priority:
+# required"/"Essential: yes" in unstable but not in stable should be installed,
+# so they will be listed in dist-upgrade output. Please take a look at
+# http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=531002#44
+#
+NOTIFY_NEW="0"
+
+#
+# Set NOTIFY_NO_UPDATES="0" if you don't want to be notified when there is no
+# new versions. Set to 1 could assure you that apticron works well.
+#
+NOTIFY_NO_UPDATE="0"
+
+#
+# Set CUSTOM_SUBJECT if you want to replace the default subject used in
+# the notification e-mails. This may help filtering/sorting client-side e-mail.
+# If you want to use internal vars please use single quotes here. Ex:
+# $CUSTOM_SUBJECT='[apticron] $SYSTEM: $NUM_PACKAGES package update(s)'
+#
+# CUSTOM_SUBJECT=""
+
+# Set CUSTOM_NO_UPDATES_SUBJECT if you want to replace the default subject used
+# in the no update notification e-mails. This may help filtering/sorting
+# client-side e-mail.
+# If you want to use internal vars please use single quotes here. Ex:
+# $CUSTOM_NO_UPDATES_SUBJECT='[apticron] $SYSTEM: no updates'
+#
+# CUSTOM_NO_UPDATES_SUBJECT=""
+
+#
+# Set CUSTOM_FROM if you want to replace the default sender by changing the
+# 'From:' field used in the notification e-mails. Your default sender will
+# be something like root@eschaton.
+#
+# CUSTOM_FROM=""
diff --git a/roles/common/templates/etc_fail2ban_jail.local.j2 b/roles/common/templates/etc_fail2ban_jail.local.j2
new file mode 100644
index 0000000..35c161c
--- /dev/null
+++ b/roles/common/templates/etc_fail2ban_jail.local.j2
@@ -0,0 +1,25 @@
+# {{ ansible_managed }}
+
+[DEFAULT]
+ignoreip  = 127.0.0.1 {{ ansible_default_ipv4.address }} {{ ' '.join(friendly_networks) }}
+bantime   = 10800
+destemail = {{ admin_email }}
+banaction = iptables-multiport
+action    = %(action_)s
+
+# JAILS
+[ssh]
+enabled   = true
+maxretry  = 8
+
+[pam-generic]
+enabled   = true
+banaction = iptables-allports
+
+[ssh-ddos]
+enabled   = true
+
+[postfix]
+enabled  = true
+maxretry = 3
+
diff --git a/roles/common/templates/etc_ssh_ssh_config.j2 b/roles/common/templates/etc_ssh_ssh_config.j2
new file mode 100644
index 0000000..db15675
--- /dev/null
+++ b/roles/common/templates/etc_ssh_ssh_config.j2
@@ -0,0 +1,61 @@
+# {{ ansible_managed }}
+
+# This is the ssh client system-wide configuration file.  See
+# ssh_config(5) for more information.  This file provides defaults for
+# users, and the values can be changed in per-user configuration files
+# or on the command line.
+
+# Configuration data is parsed as follows:
+#  1. command line options
+#  2. user-specific file
+#  3. system-wide file
+# Any configuration value is only changed the first time it is set.
+# Thus, host-specific definitions should be at the beginning of the
+# configuration file, and defaults at the end.
+
+# Site-wide defaults for some commonly used options.  For a comprehensive
+# list of available options, their meanings and defaults, please see the
+# ssh_config(5) man page.
+
+Host *
+#   ForwardAgent no
+#   ForwardX11 no
+#   ForwardX11Trusted yes
+#   RhostsRSAAuthentication no
+#   RSAAuthentication yes
+#   PasswordAuthentication yes
+#   HostbasedAuthentication no
+#   GSSAPIAuthentication no
+#   GSSAPIDelegateCredentials no
+#   GSSAPIKeyExchange no
+#   GSSAPITrustDNS no
+#   BatchMode no
+#   CheckHostIP yes
+#   AddressFamily any
+#   ConnectTimeout 0
+#   StrictHostKeyChecking ask
+#   IdentityFile ~/.ssh/identity
+#   IdentityFile ~/.ssh/id_rsa
+#   IdentityFile ~/.ssh/id_dsa
+#   Port 22
+#   Protocol 2,1
+#   Cipher 3des
+#   Ciphers aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc
+#   MACs hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160
+#   EscapeChar ~
+#   Tunnel no
+#   TunnelDevice any:any
+#   PermitLocalCommand no
+#   VisualHostKey no
+#   ProxyCommand ssh -q -W %h:%p gateway.example.com
+#   RekeyLimit 1G 1h
+    SendEnv LANG LC_*
+    HashKnownHosts yes
+    GSSAPIAuthentication yes
+    GSSAPIDelegateCredentials no
+
+    Ciphers {{ ssh_ciphers }}
+    KexAlgorithms {{ ssh_kex_algorithms }}
+    MACs {{ ssh_macs }}
+    #PasswordAuthentication no
+    UseRoaming no
diff --git a/roles/common/templates/etc_ssh_sshd_config.j2 b/roles/common/templates/etc_ssh_sshd_config.j2
new file mode 100644
index 0000000..d9978e0
--- /dev/null
+++ b/roles/common/templates/etc_ssh_sshd_config.j2
@@ -0,0 +1,95 @@
+# {{ ansible_managed }}
+# See the sshd_config(5) manpage for details
+
+# What ports, IPs and protocols we listen for
+Port 22
+# Use these options to restrict which interfaces/protocols sshd will bind to
+#ListenAddress ::
+#ListenAddress 0.0.0.0
+Protocol 2
+# HostKeys for protocol version 2
+HostKey /etc/ssh/ssh_host_rsa_key
+#HostKey /etc/ssh/ssh_host_dsa_key
+#HostKey /etc/ssh/ssh_host_ecdsa_key
+HostKey /etc/ssh/ssh_host_ed25519_key
+#Privilege Separation is turned on for security
+UsePrivilegeSeparation yes
+
+KexAlgorithms {{ ssh_kex_algorithms }}
+Ciphers {{ ssh_ciphers }}
+MACs {{ ssh_macs }}
+
+# Lifetime and size of ephemeral version 1 server key
+KeyRegenerationInterval 3600
+#ServerKeyBits 768
+ServerKeyBits 1024
+
+# Logging
+SyslogFacility AUTH
+LogLevel INFO
+
+# Authentication:
+LoginGraceTime 120
+PermitRootLogin {{ sshd_allow_root }}
+StrictModes yes
+
+RSAAuthentication yes
+PubkeyAuthentication yes
+#AuthorizedKeysFile	%h/.ssh/authorized_keys
+
+# Don't read the user's ~/.rhosts and ~/.shosts files
+IgnoreRhosts yes
+# For this to work you will also need host keys in /etc/ssh_known_hosts
+RhostsRSAAuthentication no
+# similar for protocol version 2
+HostbasedAuthentication no
+# Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication
+#IgnoreUserKnownHosts yes
+
+# To enable empty passwords, change to yes (NOT RECOMMENDED)
+PermitEmptyPasswords no
+
+# Change to yes to enable challenge-response passwords (beware issues with
+# some PAM modules and threads)
+# ChallengeResponseAuthentication no
+ChallengeResponseAuthentication yes
+
+# Change to no to disable tunnelled clear text passwords
+PasswordAuthentication {{ sshd_allow_passwd }}
+
+# Kerberos options
+#KerberosAuthentication no
+#KerberosGetAFSToken no
+#KerberosOrLocalPasswd yes
+#KerberosTicketCleanup yes
+
+# GSSAPI options
+#GSSAPIAuthentication no
+#GSSAPICleanupCredentials yes
+
+X11Forwarding {{ sshd_forward_x11 }}
+X11DisplayOffset 10
+PrintMotd {{ sshd_print_motd }}
+PrintLastLog yes
+TCPKeepAlive yes
+#UseLogin no
+
+#MaxStartups 10:30:60
+#Banner /etc/issue.net
+
+# Allow client to pass locale environment variables
+AcceptEnv LANG LC_*
+
+Subsystem sftp /usr/lib/openssh/sftp-server
+
+# 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
+
diff --git a/roles/common/templates/ntp.conf.j2 b/roles/common/templates/ntp.conf.j2
new file mode 100644
index 0000000..903f08a
--- /dev/null
+++ b/roles/common/templates/ntp.conf.j2
@@ -0,0 +1,63 @@
+# /etc/ntp.conf, configuration for ntpd; see ntp.conf(5) for help
+# {{ ansible_managed }}
+
+driftfile /var/lib/ntp/ntp.drift
+
+
+# Enable this if you want statistics to be logged.
+#statsdir /var/log/ntpstats/
+
+statistics loopstats peerstats clockstats
+filegen loopstats file loopstats type day enable
+filegen peerstats file peerstats type day enable
+filegen clockstats file clockstats type day enable
+
+
+# You do need to talk to an NTP server or two (or three).
+#server ntp.your-provider.example
+
+# pool.ntp.org maps to about 1000 low-stratum NTP servers.  Your server will
+# pick a different set every time it starts up.  Please consider joining the
+# pool: <http://www.pool.ntp.org/join.html>
+#server 0.debian.pool.ntp.org iburst
+#server 1.debian.pool.ntp.org iburst
+#server 2.debian.pool.ntp.org iburst
+#server 3.debian.pool.ntp.org iburst
+
+# Use servers configured via Ansible
+{% for server in ntp_servers %}
+server {{ server }} iburst
+{% endfor %}
+
+# fallback
+server tick.usno.navy.mil
+
+# Access control configuration; see /usr/share/doc/ntp-doc/html/accopt.html for
+# details.  The web page <http://support.ntp.org/bin/view/Support/AccessRestrictions>
+# might also be helpful.
+#
+# Note that "restrict" applies to both servers and clients, so a configuration
+# that might be intended to block requests from certain clients could also end
+# up blocking replies from your own upstream servers.
+
+# By default, exchange time with everybody, but don't allow configuration.
+restrict -4 default kod notrap nomodify nopeer noquery
+restrict -6 default kod notrap nomodify nopeer noquery
+
+# Local users may interrogate the ntp server more closely.
+restrict 127.0.0.1
+restrict ::1
+
+# Clients from this (example!) subnet have unlimited access, but only if
+# cryptographically authenticated.
+#restrict 192.168.123.0 mask 255.255.255.0 notrust
+
+
+# If you want to provide time to your local subnet, change the next line.
+# (Again, the address is an example only.)
+#broadcast 192.168.123.255
+
+# If you want to listen to time broadcasts on your local subnet, de-comment the
+# next lines.  Please do this only if you trust everybody on the network!
+#disable auth
+#broadcastclient
diff --git a/roles/common/templates/sudoers.j2 b/roles/common/templates/sudoers.j2
new file mode 100644
index 0000000..18172d8
--- /dev/null
+++ b/roles/common/templates/sudoers.j2
@@ -0,0 +1 @@
+{{ main_user_name }} ALL=(ALL) NOPASSWD: ALL