qvm-firewall – Manage VM outbound firewall


qvm-firewall [-h] [–verbose] [–quiet] [–reload] VMNAME add RULE

qvm-firewall [-h] [–verbose] [–quiet] [–reload] VMNAME del [–rule-no=*RULE_NUMBER*] [RULE]

qvm-firewall [-h] [–verbose] [–quiet] [–reload] VMNAME list [–raw]


--help, -h

show help message and exit

--verbose, -v

increase verbosity

--quiet, -q

decrease verbosity

--reload, -r

force reload of rules even when unchanged


in combination with --list, print raw rules

Actions description

Available actions:

  • add - add specified rule. See Rule syntax section below.
  • del - delete specified rule. The rule to remove can be selected either by rule number using --rule-no or by specifying the rule itself using the same syntax used for adding it.
  • list - list all the rules for a given VM.

Rule syntax

A single rule is built from:
  • action - either drop or accept
  • zero or more matches

Selected action is applied to packets when all specified matches match, further rules are not evaluated. If none of the rules match, the default firewall policy is drop.

Supported matches:
  • dsthost - destination host or network. Can be either IP address in CIDR notation, or a host name. Both IPv4 and IPv6 are supported by the rule syntax. In order to allow reuse of --raw output, dst4 and dst6 are accepted as synonyms.
  • dst4 - see dsthost
  • dst6 - see dsthost
  • proto - specific IP protocol. Supported values: tcp, udp, icmp.
  • dstports - destination port or ports range. Can be either a single port or a range separated by -. Valid only together with proto=udp or proto=tcp.
  • icmptype - ICMP message type, specified as numeric value. Valid only together with proto=icmp.
  • specialtarget - predefined target. Currently the only supported value is dns. This can be combined with other matches to narrow it down.
  • expire - the rule matches only until the specified time and is then automatically removed. The time can be given either as number of seconds since 1/1/1970 or as +seconds, a relative time (+300 means 5 minutes from now).


Joanna Rutkowska <joanna at invisiblethingslab dot com>
Rafal Wojtczuk <rafal at invisiblethingslab dot com>
Marek Marczykowski <marmarek at invisiblethingslab dot com>
Wojtek Porczyk <woju at invisiblethingslab dot com>