Warning

Changes to this file do not take effect until after the next shorewall6 start, shorewall6 reload, shorewall6 restart, or shorewall6 compile command.

The columns in the file are as follows (where the column name is followed by a different name in parentheses, the different name is used in the alternate specification syntax).

ACTION - ACCEPT|NOTRACK

Determines the disposition of the packet.

ACCEPT means that the packet will be accepted.

NOTRACK indicates that no conntrack entry should be created for the packet. NOTRACK does not imply ACCEPT.

DROP was added in Shorewall 4.6.0 and causes the packet to be dropped in the raw table's PREROUTING chain.

SOURCE - [-|[$FW|interface]|[{$FW|interface}[:address[,address]...]]|[address[,address]...]

$FW matches packets originating on the firewall itself, while interface specifies packets arriving on the named interface.

This column may also include a comma-separated list of IP/subnet addresses. If your kernel and iptables include iprange match support, IP address ranges are also allowed. Ipsets and exclusion are also supported. When $FW or interface are specified, the list must be preceded by a colon (":").

If left empty or supplied as "-", ::/0 is assumed.

DEST - [-|[$FW|interface]|[{$FW|interface}[:address[,address]...]]|[address[,address]...]

$FW matches packets addressed the firewall itself, while interface specifies packets arriving on the named interface. Neither may be specified if the target is NOTRACK or DROP.

This column may also include a comma-separated list of IP/subnet addresses. If your kernel and iptables include iprange match support, IP address ranges are also allowed. Ipsets and exclusion are also supported. When $FW or interface are specified, the list must be preceded by a colon (":").

If left empty or supplied as "-", ::/0 is assumed.

PROTO (Optional) - protocol-name-or-number[,...]

Protocol.

Beginning with Shorewall 4.5.12, this column can accept a comma-separated list of protocols.

DPORT - service-name/port-number-list

Optional. A comma-separated list of port numbers and/or service names from /etc/services. May also include port ranges of the form low-port:high-port if your kernel and iptables include port range support.

This column was formerly labelled DEST PORT(S).

SPORT - service-name/port-number-list

Optional. A comma-separated list of port numbers and/or service names from /etc/services. May also include port ranges of the form low-port:high-port if your kernel and iptables include port range support.

Beginning with Shorewall 4.5.15, you may place '=' in this column, provided that the DPORT column is non-empty. This causes the rule to match when either the source port or the destination port in a packet matches one of the ports specified in DPORT. Use of '=' requires multi-port match in your iptables and kernel.

This column was formerly labelled SOURCE PORT(S).