'\" t
.\"     Title: shorewall6-hosts
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: 03/16/2017
.\"    Manual: Configuration Files
.\"    Source: Configuration Files
.\"  Language: English
.\"
.TH "SHOREWALL6\-HOSTS" "5" "03/16/2017" "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"
hosts \- shorewall6 file
.SH "SYNOPSIS"
.HP \w'\fB/etc/shorewall6/hosts\fR\ 'u
\fB/etc/shorewall6/hosts\fR
.SH "DESCRIPTION"
.PP
This file is used to define zones in terms of subnets and/or individual IP addresses\&. Most simple setups don\*(Aqt need to (should not) place anything in this file\&.
.PP
The order of entries in this file is not significant in determining zone composition\&. Rather, the order that the zones are declared in
\m[blue]\fBshorewall6\-zones\fR\m[]\&\s-2\u[1]\d\s+2(5) determines the order in which the records in this file are interpreted\&.
.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
The only time that you need this file is when you have more than one zone connected through a single interface\&.
.sp .5v
.RE
.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
If you have an entry for a zone and interface in
\m[blue]\fBshorewall6\-interfaces\fR\m[]\&\s-2\u[2]\d\s+2(5) then do not include any entries in this file for that same (zone, interface) pair\&.
.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
\fBZONE\fR \- \fIzone\-name\fR
.RS 4
The name of a zone declared in
\m[blue]\fBshorewall6\-zones\fR\m[]\&\s-2\u[1]\d\s+2(5)\&. You may not list the firewall zone in this column\&.
.RE
.PP
\fBHOST(S)\fR (hosts)\- \fIinterface\fR:{\fIaddress\-or\-range\fR[,\fIaddress\-or\-range\fR]\&.\&.\&.|+\fIipset\fR|\fBdynamic\fR}[\fIexclusion\fR]
.RS 4
The name of an interface defined in the
\m[blue]\fBshorewall6\-interfaces\fR\m[]\&\s-2\u[2]\d\s+2(5) file followed by a colon (":") and a comma\-separated list whose elements are either:
.sp
.RS 4
.ie n \{\
\h'-04' 1.\h'+01'\c
.\}
.el \{\
.sp -1
.IP "  1." 4.2
.\}
The IPv6
\fIaddress\fR
of a host\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 2.\h'+01'\c
.\}
.el \{\
.sp -1
.IP "  2." 4.2
.\}
A network in CIDR format\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 3.\h'+01'\c
.\}
.el \{\
.sp -1
.IP "  3." 4.2
.\}
An IP address range of the form [\fIlow\&.address\fR]\-[\fIhigh\&.address\fR]\&. Your kernel and ip6tables must have iprange match support\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 4.\h'+01'\c
.\}
.el \{\
.sp -1
.IP "  4." 4.2
.\}
The name of an
\fIipset\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 5.\h'+01'\c
.\}
.el \{\
.sp -1
.IP "  5." 4.2
.\}
The word
\fBdynamic\fR
which makes the zone dynamic in that you can use the
\fBshorewall add\fR
and
\fBshorewall delete\fR
commands to change to composition of the zone\&. This capability was added in Shorewall 4\&.4\&.21\&.
.RE
.sp
You may also exclude certain hosts through use of an
\fIexclusion\fR
(see
\m[blue]\fBshorewall6\-exclusion\fR\m[]\&\s-2\u[3]\d\s+2(5)\&.
.RE
.PP
OPTIONS \- [\fIoption\fR[\fB,\fR\fIoption\fR]\&.\&.\&.]
.RS 4
An optional comma\-separated list of options from the following list\&. The order in which you list the options is not significant but the list must have no embedded white\-space\&.
.PP
\fBblacklist\fR
.RS 4
Check packets arriving on this port against the
\m[blue]\fBshorewall6\-blacklist\fR\m[]\&\s-2\u[4]\d\s+2(5) file\&.
.RE
.PP
\fBipsec\fR
.RS 4
The zone is accessed via a kernel 2\&.6 ipsec SA\&. Note that if the zone named in the ZONE column is specified as an IPSEC zone in the
\m[blue]\fBshorewall6\-zones\fR\m[]\&\s-2\u[1]\d\s+2(5) file then you do NOT need to specify the \*(Aqipsec\*(Aq option here\&.
.RE
.PP
\fBmss\fR=\fImss\fR
.RS 4
Added in Shorewall 4\&.5\&.2\&. When present, causes the TCP mss for new connections to/from the hosts given in the HOST(S) column to be clamped at the specified
\fImss\fR\&.
.RE
.PP
\fBrouteback\fR
.RS 4
shorewall6 should set up the infrastructure to pass packets from this/these address(es) back to themselves\&. This is necessary if hosts in this group use the services of a transparent proxy that is a member of the group or if DNAT is used to send requests originating from this group to a server in the group\&.
.RE
.PP
\fBtcpflags\fR
.RS 4
Packets arriving from these hosts are checked for certain illegal combinations of TCP flags\&. Packets found to have such a combination of flags are handled according to the setting of TCP_FLAGS_DISPOSITION after having been logged according to the setting of TCP_FLAGS_LOG_LEVEL\&.
.RE
.RE
.SH "FILES"
.PP
/etc/shorewall6/hosts
.SH "SEE ALSO"
.PP
\m[blue]\fBhttp://www\&.shorewall\&.net/configuration_file_basics\&.htm#Pairs\fR\m[]\&\s-2\u[5]\d\s+2
.PP
shorewall6(8), shorewall6\-accounting(5), shorewall6\-actions(5), shorewall6\-blacklist(5), shorewall6\-interfaces(5), shorewall6\-maclist(5), shorewall6\-netmap(5),shorewall6\-params(5), shorewall6\-policy(5), shorewall6\-providers(5), shorewall6\-rtrules(5), shorewall6\-routestopped(5), shorewall6\-rules(5), shorewall6\&.conf(5), shorewall6\-secmarks(5), shorewall6\-tcclasses(5), shorewall6\-tcdevices(5), shorewall6\-mangle(5), shorewall6\-tos(5), shorewall6\-tunnels(5), shorewall\-zones(5)
.SH "NOTES"
.IP " 1." 4
shorewall6-zones
.RS 4
\%http://www.shorewall.net/manpages6/shorewall6-zones.html
.RE
.IP " 2." 4
shorewall6-interfaces
.RS 4
\%http://www.shorewall.net/manpages6/shorewall6-interfaces.html
.RE
.IP " 3." 4
shorewall6-exclusion
.RS 4
\%http://www.shorewall.net/manpages6/shorewall6-exclusion.html
.RE
.IP " 4." 4
shorewall6-blacklist
.RS 4
\%http://www.shorewall.net/manpages6/shorewall6-blacklist.html
.RE
.IP " 5." 4
http://www.shorewall.net/configuration_file_basics.htm#Pairs
.RS 4
\%http://www.shorewall.net/configuration_file_basics.htm#Pairs
.RE