projects / network.git / blame
| Commit | Line | Data |
|---|---|---|
| 98146c00 MT |
1 | #!/bin/bash |
| 2 | ############################################################################### | |
| 3 | # # | |
| 4 | # IPFire.org - A linux based firewall # | |
| 5 | # Copyright (C) 2012 IPFire Network Development Team # | |
| 6 | # # | |
| 7 | # This program is free software: you can redistribute it and/or modify # | |
| 8 | # it under the terms of the GNU General Public License as published by # | |
| 9 | # the Free Software Foundation, either version 3 of the License, or # | |
| 10 | # (at your option) any later version. # | |
| 11 | # # | |
| 12 | # This program is distributed in the hope that it will be useful, # | |
| 13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of # | |
| 14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # | |
| 15 | # GNU General Public License for more details. # | |
| 16 | # # | |
| 17 | # You should have received a copy of the GNU General Public License # | |
| 18 | # along with this program. If not, see <http://www.gnu.org/licenses/>. # | |
| 19 | # # | |
| 20 | ############################################################################### | |
| 21 | ||
| 22 | function policy_add_zone() { | |
| 23 | local zone=${1} | |
| 24 | assert isset zone | |
| 25 | ||
| 26 | log DEBUG "Creating firewall policy for zone '${zone}'." | |
| 27 | ||
| 28 | local chain="ZONE_${zone}" | |
| 29 | chain=${chain^^} | |
| 30 | ||
| 31 | # Create filter chain. | |
| 32 | iptables_chain_create ${chain} | |
| 33 | iptables -A INPUT -i ${zone} -j ${chain} | |
| 34 | iptables -A FORWARD -i ${zone} -j ${chain} | |
| 35 | iptables -A FORWARD -o ${zone} -j ${chain} | |
| 36 | iptables -A OUTPUT -o ${zone} -j ${chain} | |
| 37 | ||
| 38 | # Leave some space for own rules right at the beginning | |
| 39 | # to make it possible to overwrite _everything_. | |
| 40 | iptables_chain_create ${chain}_CUSTOM | |
| 41 | iptables -A ${chain} -j ${chain}_CUSTOM | |
| 42 | ||
| 43 | # Intrusion Prevention System | |
| 44 | iptables_chain_create ${chain}_IPS | |
| 45 | iptables -A ${chain} -i ${zone} -j ${chain}_IPS | |
| 46 | ||
| 47 | # Port forwarding chain. | |
| 48 | iptables_chain_create ${chain}_PORTFW | |
| 49 | iptables -A ${chain} -i ${zone} -j ${chain}_PORTFW | |
| 50 | ||
| 51 | # Outgoing firewall | |
| 52 | iptables_chain_create ${chain}_OUTFW | |
| 53 | iptables -A ${chain} -o ${zone} -j ${chain}_OUTFW | |
| 54 | ||
| 55 | # Policy rules | |
| 56 | iptables_chain_create ${chain}_POLICY | |
| 57 | iptables -A ${chain} -j ${chain}_POLICY | |
| 58 | ||
| 59 | # Create mangle chain. | |
| 60 | iptables_chain_create -t mangle ${chain} | |
| 61 | iptables -t mangle -A PREROUTING -i ${zone} -j ${chain} | |
| 62 | iptables -t mangle -A POSTROUTING -o ${zone} -j ${chain} | |
| 63 | ||
| 64 | # Quality of Service | |
| 65 | iptables_chain_create -t mangle ${chain}_QOS_INC | |
| 66 | iptables -t mangle -A ${chain} -i ${zone} -j ${chain}_QOS_INC | |
| 67 | iptables_chain_create -t mangle ${chain}_QOS_OUT | |
| 68 | iptables -t mangle -A ${chain} -o ${zone} -j ${chain}_QOS_OUT | |
| 69 | ||
| 70 | # Create NAT chain. | |
| 71 | iptables_chain_create -t nat ${chain} | |
| 72 | iptables -t nat -A PREROUTING -i ${zone} -j ${chain} | |
| 73 | iptables -t nat -A POSTROUTING -o ${zone} -j ${chain} | |
| 74 | ||
| 75 | # Network Address Translation | |
| 76 | iptables_chain_create -t nat ${chain}_NAT | |
| 77 | iptables -t nat -A ${chain} -i ${zone} -j ${chain}_NAT | |
| 78 | ||
| 79 | # Portforwarding | |
| 80 | iptables_chain_create -t nat ${chain}_PORTFW | |
| 81 | iptables -t nat -A ${chain} -i ${zone} -j ${chain}_PORTFW | |
| 82 | ||
| 83 | # UPNP | |
| 84 | iptables_chain_create -t nat ${chain}_UPNP | |
| 85 | iptables -t nat -A ${chain} -j ${chain}_UPNP | |
| 86 | ||
| 87 | # After the chains that are always available have been | |
| 88 | # created, we will add a custom policy to every single | |
| 89 | # zone. | |
| 90 | ||
| 91 | # Local zones are currently allowed to access everything. | |
| 92 | if zone_is_local ${zone}; then | |
| 93 | policy_allow_all ${zone} ${chain} | |
| 94 | ||
| 95 | # Uplink connections are not. | |
| 96 | else | |
| 97 | : # XXX TODO | |
| 98 | fi | |
| 99 | } | |
| 100 | ||
| 101 | function policy_add_localhost() { | |
| 102 | log DEBUG "Creating firewall policy for localhost..." | |
| 103 | ||
| 104 | # Accept everything on lo | |
| 105 | iptables -A INPUT -i lo -j ACCEPT | |
| 106 | iptables -A OUTPUT -o lo -j ACCEPT | |
| 107 | } | |
| 108 | ||
| 109 | function policy_allow_all() { | |
| 110 | local zone=${1} | |
| 111 | assert isset zone | |
| 112 | ||
| 113 | local chain=${2} | |
| 114 | assert isset chain | |
| 115 | ||
| 116 | # Just accept everything. | |
| 117 | iptables -A ${chain}_POLICY -j ACCEPT | |
| 118 | } |