Forge Home

Modules

Puppet

Resources

PuppetEcosystemPuppet CommunityUpdates

nft

configure nftables firewalls using puppet
Project URLRSS FeedReport issues

1,044 downloads

83 latest version

5.0 quality score

We run a couple of automated
scans to help you access a
module's quality. Each module is
given a score based on how well
the author has formatted their
code and documentation and
modules are also checked for
malware using VirusTotal.

Please note, the information below
is for guidance only and neither of
these methods should be considered
an endorsement by Puppet.

Version information

  • 0.0.10 (latest)
  • 0.0.9
  • 0.0.8
  • 0.0.7
  • 0.0.6
  • 0.0.5
  • 0.0.4
  • 0.0.3
  • 0.0.2
released Jul 3rd 2024
This version is compatible with:
  • Puppet Enterprise 2023.2.x, 2023.1.x, 2023.0.x, 2021.7.x, 2021.6.x, 2021.5.x, 2021.4.x, 2021.3.x, 2021.2.x, 2021.1.x, 2021.0.x, 2019.8.x
  • Puppet >= 6.21.0 < 8.0.0
  • , ,

Start using this module

  • r10k or Code Manager
  • Bolt
  • Manual installation
  • Direct download

Add this module to your Puppetfile:

mod 'weasel-nft', '0.0.10'
Learn more about managing modules with a Puppetfile

Add this module to your Bolt project:

bolt module add weasel-nft
Learn more about using this module with an existing project

Manually install this module globally with Puppet module tool:

puppet module install weasel-nft --version 0.0.10

Direct download is not typically how you would use a Puppet module to manage your infrastructure, but you may want to download the module in order to inspect the code.

Download

Documentation

weasel/nft — version 0.0.10 Jul 3rd 2024

noreply nftables Puppet module

Overview

This nft module provides building blocks for making an nftables firewall using puppet. It does not come with a policy but it provides the infrastructure for building your own.

Usage

Here's an example:

# local noreply.org nft policies
class my_nft() {
  $log_limit_rate = '5/minute burst 5 packets'
  $reject_rate = '60/minute burst 120 packets'

  class{ 'nft': }

  nft::chain{ 'input': }
  nft::chain{ 'forward': }
  nft::chain{ 'output': }

  nft::chain{ 'services_tcp': }
  nft::chain{ 'services_udp': }

  nft::rule{
    'iif lo counter accept': order => 100;
    'meta l4proto icmp counter accept': order => 101;
    'meta l4proto ipv6-icmp counter accept': order => 101;

    'ct state established,related counter accept': order => 110;

    'meta l4proto tcp counter jump services_tcp': order => 1200;
    'meta l4proto udp counter jump services_udp': order => 1201;
    'goto log_reject_drop': order => 9900;
  }

  nft::chain{ 'log_reject_drop':
    rules => [
      "limit rate ${log_limit_rate} log flags all counter",
      "limit rate ${reject_rate} meta l4proto tcp counter reject with tcp reset",
      "limit rate ${reject_rate} meta l4proto != tcp counter reject with icmpx type admin-prohibited",
      'counter drop',
    ]
  }

  include my_nft::rule::ssh
}

# Allow ssh either from everywhere or from the networks in src
#
# @param src Hosts to allow ssh connections from
class my_nft::rule::ssh(
  Optional[Array[Stdlib::IP::Address]] $src = undef,
) {
  if $src =~ Undef {
    nft::rule{ 'allow-ssh':
      rule  => 'tcp dport ssh counter accept',
      chain => 'services_tcp',
    }
  } else {
    $ip4 = $src.filter |$a| { $a !~ Stdlib::IP::Address::V6 }
    $ip6 = $src.filter |$a| { $a =~ Stdlib::IP::Address::V6 }

    nft::rule{ 'allow-ssh4':
      rule  => "tcp dport ssh ip  saddr { ${ip4.join(', ')} } counter accept",
      chain => 'services_tcp',
    }
    nft::rule{ 'allow-ssh6':
      rule  => "tcp dport ssh ip6 saddr { ${ip6.join(', ')} } counter accept",
      chain => 'services_tcp',
    }
  }
}

And another one:

class mprofiles::puppetagent (
) {
# [...]
# $addresses = [...]

  # export a firewall rule to the puppet server
  @@nft::simple{ "puppet-${trusted['certname']}":
    tag   => "to-${server_facts['servername']}",
    saddr => $addresses,
    chain => 'puppetserver',
  }
}

class mprofiles::puppetserver (
) {
  nft::chain{ 'puppetserver': }
  nft::rule{ 'tcp dport 8140 counter jump puppetserver': chain => 'services_tcp' }

  # Collect firewall rules exported to us
  Nft::Simple <<| tag == "to-${trusted['certname']}" |>>
}