'\" t
.\"     Title: shorewall-netmap
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: 09/24/2020
.\"    Manual: Configuration Files
.\"    Source: Configuration Files
.\"  Language: English
.\"
.TH "SHOREWALL\-NETMAP" "5" "09/24/2020" "Configuration Files" "Configuration Files"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
netmap \- Shorewall NETMAP definition file
.SH "SYNOPSIS"
.HP \w'\fB/etc/shorewall[6]/netmap\fR\ 'u
\fB/etc/shorewall[6]/netmap\fR
.SH "DESCRIPTION"
.PP
This file is used to map addresses in one network to corresponding addresses in a second network\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBWarning\fR
.ps -1
.br
.PP
To use this file, your kernel and iptables must have NETMAP support included\&.
.sp .5v
.RE
.PP
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)\&.
.PP
\fBTYPE\fR \- \fB{DNAT\fR|\fBSNAT}\fR
.RS 4
If DNAT, traffic entering INTERFACE and addressed to NET1 has its destination address rewritten to the corresponding address in NET2\&.
.sp
If SNAT, traffic leaving INTERFACE with a source address in NET1 has it\*(Aqs source address rewritten to the corresponding address in NET2\&.
.RE
.PP
\fBNET1\fR \- \fInetwork\-address\fR
.RS 4
Network in CIDR format (e\&.g\&., 192\&.168\&.1\&.0/24)\&. Beginning with Shorewall 4\&.4\&.24,
\m[blue]\fBexclusion\fR\m[]\&\s-2\u[1]\d\s+2
is supported\&.
.RE
.PP
\fBINTERFACE\fR \- \fIinterface\fR
.RS 4
The name of a network interface\&. The interface must be defined in
\m[blue]\fBshorewall\-interfaces\fR\m[]\&\s-2\u[2]\d\s+2(5)\&. Shorewall allows loose matches to wildcard entries in
\m[blue]\fBshorewall\-interfaces\fR\m[]\&\s-2\u[2]\d\s+2(5)\&. For example,
ppp0
in this file will match a
\m[blue]\fBshorewall\-interfaces\fR\m[]\&\s-2\u[2]\d\s+2(8) entry that defines
ppp+\&.
.RE
.PP
\fBNET2\fR \- \fInetwork\-address\fR
.RS 4
Network in CIDR format
.RE
.PP
\fBNET3 (Optional)\fR \- \fInetwork\-address\fR
.RS 4
Added in Shorewall 4\&.4\&.11\&. If specified, qualifies INTERFACE\&. It specifies a SOURCE network for DNAT rules and a DESTINATION network for SNAT rules\&.
.RE
.PP
\fBPROTO\fR \- \fIprotocol\-number\-or\-name\fR
.RS 4
Optional \-\- added in Shorewall 4\&.4\&.23\&.2\&. Only packets specifying this protocol will have their IP header modified\&.
.RE
.PP
\fBDPORT\fR \- \fIport\-number\-or\-name\-list\fR
.RS 4
Optional \- added in Shorewall 4\&.4\&.23\&.2\&. Destination Ports\&. A comma\-separated list of Port names (from services(5)),
\fIport number\fRs or
\fIport range\fRs; if the protocol is
\fBicmp\fR, this column is interpreted as the destination icmp\-type(s)\&. ICMP types may be specified as a numeric type, a numeric type and code separated by a slash (e\&.g\&., 3/4), or a typename\&. See
\m[blue]\fBhttps://shorewall\&.org/configuration_file_basics\&.htm#ICMP\fR\m[]\&\s-2\u[3]\d\s+2\&.
.sp
If the protocol is
\fBipp2p\fR, this column is interpreted as an ipp2p option without the leading "\-\-" (example
\fBbit\fR
for bit\-torrent)\&. If no PORT is given,
\fBipp2p\fR
is assumed\&.
.sp
An entry in this field requires that the PROTO column specify icmp (1), tcp (6), udp (17), sctp (132) or udplite (136)\&. Use \*(Aq\-\*(Aq if any of the following field is supplied\&.
.sp
This column was formerly labelled DEST PORT(S)\&.
.RE
.PP
\fBSPORT\fR \- \fIport\-number\-or\-name\-list\fR
.RS 4
Optional \-\- added in Shorewall 4\&.4\&.23\&.2\&. Source port(s)\&. If omitted, any source port is acceptable\&. Specified as a comma\-separated list of port names, port numbers or port ranges\&.
.sp
An entry in this field requires that the PROTO column specify tcp (6), udp (17), sctp (132) or udplite (136)\&. Use \*(Aq\-\*(Aq if any of the following fields is supplied\&.
.sp
This column was formerly labelled SOURCE PORT(S)\&.
.RE
.SH "FILES"
.PP
/etc/shorewall/netmap
.PP
/etc/shorewall6/netmap
.SH "SEE ALSO"
.PP
\m[blue]\fBhttps://shorewall\&.org/netmap\&.html\fR\m[]\&\s-2\u[4]\d\s+2
.PP
\m[blue]\fBhttps://shorewall\&.org/configuration_file_basics\&.htm#Pairs\fR\m[]\&\s-2\u[5]\d\s+2
.PP
shorewall(8)
.SH "NOTES"
.IP " 1." 4
exclusion
.RS 4
\%https://shorewall.org/manpages/shorewall-exclusion.html
.RE
.IP " 2." 4
shorewall-interfaces
.RS 4
\%https://shorewall.org/manpages/shorewall-interfaces.html
.RE
.IP " 3." 4
https://shorewall.org/configuration_file_basics.htm#ICMP
.RS 4
\%https://shorewall.org/configuration_file_basics.htm#ICMP
.RE
.IP " 4." 4
https://shorewall.org/netmap.html
.RS 4
\%https://shorewall.org/netmap.html
.RE
.IP " 5." 4
https://shorewall.org/configuration_file_basics.htm#Pairs
.RS 4
\%https://shorewall.org/configuration_file_basics.htm#Pairs
.RE