If you need to manage your firewalls using ansible, below, you will find several examples and rules to guide you through a simple method to maintain your consistent firewall privileges.
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Parameters
- name: Allow everything and enable UFW
ufw:
state: enabled
policy: allow
- name: Set logging
ufw:
logging: 'on'
# Sometimes it is desirable to let the sender know when traffic is
# being denied, rather than simply ignoring it. In these cases, use
# reject instead of deny. In addition, log rejected connections:
- ufw:
rule: reject
port: auth
log: yes
# ufw supports connection rate limiting, which is useful for protecting
# against brute-force login attacks. ufw will deny connections if an IP
# address has attempted to initiate 6 or more connections in the last
# 30 seconds. See http://www.debian-administration.org/articles/187
# for details. Typical usage is:
- ufw:
rule: limit
port: ssh
proto: tcp
# Allow OpenSSH. (Note that as ufw manages its own state, simply removing
# a rule=allow task can leave those ports exposed. Either use delete=yes
# or a separate state=reset task)
- ufw:
rule: allow
name: OpenSSH
- name: Delete OpenSSH rule
ufw:
rule: allow
name: OpenSSH
delete: yes
- name: Deny all access to port 53
ufw:
rule: deny
port: '53'
- name: Allow port range 60000-61000
ufw:
rule: allow
port: 60000:61000
proto: tcp
- name: Allow all access to tcp port 80
ufw:
rule: allow
port: '80'
proto: tcp
- name: Allow all access from RFC1918 networks to this host
ufw:
rule: allow
src: '{{ item }}'
loop:
- 10.0.0.0/8
- 172.16.0.0/12
- 192.168.0.0/16
- name: Deny access to udp port 514 from host 1.2.3.4 and include a comment
ufw:
rule: deny
proto: udp
src: 1.2.3.4
port: '514'
comment: Block syslog
- name: Allow incoming access to eth0 from 1.2.3.5 port 5469 to 1.2.3.4 port 5469
ufw:
rule: allow
interface: eth0
direction: in
proto: udp
src: 1.2.3.5
from_port: '5469'
dest: 1.2.3.4
to_port: '5469'
# Note that IPv6 must be enabled in /etc/default/ufw for IPv6 firewalling to work.
- name: Deny all traffic from the IPv6 2001:db8::/32 to tcp port 25 on this host
ufw:
rule: deny
proto: tcp
src: 2001:db8::/32
port: '25'
- name: Deny all IPv6 traffic to tcp port 20 on this host
# this should be the first IPv6 rule
ufw:
rule: deny
proto: tcp
port: '20'
to_ip: "::"
insert: 0
insert_relative_to: first-ipv6
- name: Deny all IPv4 traffic to tcp port 20 on this host
# This should be the third to last IPv4 rule
# (insert: -1 addresses the second to last IPv4 rule;
# so the new rule will be inserted before the second
# to last IPv4 rule, and will be come the third to last
# IPv4 rule.)
ufw:
rule: deny
proto: tcp
port: '20'
to_ip: "::"
insert: -1
insert_relative_to: last-ipv4
# Can be used to further restrict a global FORWARD policy set to allow
- name: Deny forwarded/routed traffic from subnet 1.2.3.0/24 to subnet 4.5.6.0/24
ufw:
rule: deny
route: yes
src: 1.2.3.0/24
dest: 4.5.6.0/24
