README

   1 Experimental software, only used for testing!
   2 =============================================
   3
   4 Note: you need to change values in /etc/sysctl.d/pve.conf to:
   5
   6 net.bridge.bridge-nf-call-ip6tables = 1
   7 net.bridge.bridge-nf-call-iptables = 1
   8 net.bridge.bridge-nf-call-arptables = 1
   9 net.bridge.bridge-nf-filter-vlan-tagged = 1
  10
  11 and reboot after that change.
  12
  13 Quick Intro
  14 ===========
  15
  16 VM firewall rules are read from /etc/pve/firewall/<VMID>.fw
  17
  18 You can find examples in the example/ dir
  19
  20 Note: All commands overwrites /etc/shorewall/, so don't use if you have
  21 and existing shorewall config you want to keep.
  22
  23 Use the following command to generate shorewall configuration:
  24
  25 ./pvefw compile
  26
  27 To compile and start the firewall:
  28
  29 ./pvefw start
  30
  31 To compile and restart the firewall:
  32
  33 ./pvefw restart
  34
  35 To stop the firewall:
  36
  37 ./pvefw stop
  38
  39 To clear all iptable rules:
  40
  41 ./pvefw clear
  42
  43
  44 Implementation details
  45 ======================
  46
  47 We do not write iptables rules directly. Instead we use shorewall to
  48 do that low level stuff.
  49
  50 Each VM can have its own firewall definition file in
  51
  52 /etc/pve/firewall/<VMID>.fw
  53
  54 That file has two sections for inbound [IN] and outbound [OUT] traffic.
  55
  56 Format is: ACTION IFACE SOURCE DEST PROTO D-PORT S-PORT
  57
  58 * ACTION: shorewall action
  59 * IFACE: vm network interface (net0 - net5), or '-' for all interfaces
  60 * SOURCE: source IP address, or '-' for any source
  61 * DEST: dest IP address, or '-' for any destination address
  62 * PROTO: see /etc/protocols
  63 * D-PORT: destination port
  64 * S-PORT: source port
  65
  66
  67