| 1 | shorewall_simple
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| 2 | ================
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| 3 |
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| 4 | _WARNING: This role can be dangerous to use. If you lose network connectivity
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| 5 | to your target host by incorrectly configuring your firewall, you may be
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| 6 | unable to recover without physical access to the machine._
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| 7 |
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| 8 | This role installs and configures Shorewall for a simple, single network interface (can be a bond, of course) server.
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| 9 |
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| 10 | Requirements
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| 11 | ------------
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| 12 |
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| 13 | This role requires Ansible 1.4 or higher and platform requirements are listed
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| 14 | in the metadata file.
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| 15 |
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| 16 | Role Variables
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| 17 | --------------
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| 18 |
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| 19 | The variables that can be passed to this role and a brief description about
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| 20 | them are as follows. These are all based on the configuration variables of the
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| 21 | Shorewall configuration.
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| 22 |
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| 23 | shorewall_enabled: "Yes"
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| 24 | shorewall_startup: 1
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| 25 | shorewall_wait_interface: "eth0"
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| 26 | shorewall_options: ""
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| 27 | shorewall_startoptions: ""
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| 28 | shorewall_restartoptions: ""
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| 29 | shorewall_initlog: "/var/log/shorewall_init.log"
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| 30 | shorewall_safestop: 0
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| 31 |
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| 32 | shorewall_zones:
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| 33 | - zone: "fw"
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| 34 | type: "firewall"
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| 35 | - zone: "net"
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| 36 | type: "ipv4"
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| 37 | options="-"
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| 38 | options_in="strict"
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| 39 | options_out="-"
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| 40 |
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| 41 | shorewall_interfaces:
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| 42 | - interface: "eth0"
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| 43 | zone: "net"
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| 44 | broadcast: "detect"
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| 45 | options: "dhcp,tcpflags,nosmurfs,logmartians"
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| 46 |
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| 47 | shorewall_policies:
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| 48 | - source: "$FW"
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| 49 | destination: "net"
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| 50 | policy: "ACCEPT"
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| 51 | - source: "net"
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| 52 | destination: "$FW"
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| 53 | policy: "ACCEPT"
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| 54 | - source: "all"
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| 55 | destination: "all"
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| 56 | policy: "DROP"
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| 57 | log_level: "info"
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| 58 | burst_limit: "10/second:100"
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| 59 |
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| 60 | shorewall_rules:
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| 61 | - section: "NEW"
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| 62 | rules:
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| 63 | - action: "ACCEPT"
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| 64 | source: "net"
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| 65 | destination: "$FW"
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| 66 | protocol: "tcp"
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| 67 | destination_port: 22
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| 68 | source_port: "-"
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| 69 | original_destination: "-"
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| 70 | rate_limit: "-"
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| 71 | user_group: "-"
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| 72 | mark: "-"
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| 73 | connection_limit: "-"
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| 74 | time: "-"
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| 75 | headers: "-"
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| 76 | switch: "-"
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| 77 |
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| 78 | Examples
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| 79 | ========
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| 80 |
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| 81 | 1) Example allowing all traffic in and out
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| 82 |
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| 83 | - hosts: all
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| 84 | - roles:
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| 85 | - role: shorewall_simple
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| 86 | shorewall_enabled: "Yes"
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| 87 | shorewall_zones:
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| 88 | - zone: "fw"
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| 89 | type: "firewall"
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| 90 | - zone: "net"
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| 91 | type: "ipv4"
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| 92 | shorewall_interfaces:
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| 93 | - interface: "eth0"
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| 94 | zone: "net"
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| 95 | broadcast: "detect"
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| 96 | options: "dhcp,tcpflags,nosmurfs,logmartians"
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| 97 | shorewall_policies:
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| 98 | - source: "all"
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| 99 | destination: "all"
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| 100 | policy: "ACCEPT"
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| 101 |
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| 102 | 2) Example allowing all outgoing traffic but block incomming traffic and log
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| 103 | it, but allow incomming SSH traffic and accept Ping
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| 104 |
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| 105 | - hosts: all
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| 106 | - roles:
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| 107 | - role: shorewall_simple
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| 108 | shorewall_enabled: "Yes"
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| 109 | shorewall_zones:
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| 110 | - zone: "fw"
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| 111 | type: "firewall"
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| 112 | - zone: "net"
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| 113 | type: "ipv4"
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| 114 | shorewall_interfaces:
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| 115 | - interface: "eth0"
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| 116 | zone: "net"
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| 117 | broadcast: "detect"
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| 118 | options: "dhcp,tcpflags,nosmurfs,logmartians"
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| 119 | shorewall_policies:
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| 120 | - source: "$FW"
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| 121 | destination: "net"
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| 122 | policy: "ACCEPT"
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| 123 | - source: "net"
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| 124 | destination: "$FW"
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| 125 | policy: "DROP"
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| 126 | log_level: "info"
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| 127 | - source: "all"
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| 128 | destination: "all"
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| 129 | policy: "DROP"
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| 130 | shorewall_rules:
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| 131 | - section: "NEW"
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| 132 | rules:
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| 133 | - action: "Ping/ACCEPT"
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| 134 | source: "net"
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| 135 | destination: "$FW"
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| 136 | - action: "ACCEPT"
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| 137 | source: "net"
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| 138 | destination: "$FW"
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| 139 | protocol: "tcp"
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| 140 | destination_port: 22
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| 141 |
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| 142 | Dependencies
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| 143 | ------------
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| 144 |
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| 145 | All systems:
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| 146 | - iptables
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| 147 |
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| 148 | Red Hat based distributions:
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| 149 | - EPEL
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| 150 |
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| 151 | License
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| 152 | -------
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| 153 |
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| 154 | BSD
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| 155 |
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| 156 | Author Information
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| 157 | ------------------
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| 158 |
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| 159 | Philippe Dellaert
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| 160 |
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| 161 |
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| 162 |
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