'\" t
.\"     Title: shorewall-secmarks
.\"    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\-SECMARKS" "5" "09/24/2020" "Configuration Files" "Configuration Files"
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.SH "NAME"
secmarks \- Shorewall file
.SH "SYNOPSIS"
.HP \w'\fB/etc/shorewall[6]/secmarks\fR\ 'u
\fB/etc/shorewall[6]/secmarks\fR
.SH "DESCRIPTION"
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBImportant\fR
.ps -1
.br
.PP
Unlike rules in the
\m[blue]\fBshorewall\-rules\fR\m[]\&\s-2\u[1]\d\s+2(5) file, evaluation of rules in this file will continue after a match\&. So the final secmark for each packet will be the one assigned by the LAST rule that matches\&.
.sp .5v
.RE
.PP
The secmarks file is used to associate an SELinux context with packets\&. It was added in Shorewall version 4\&.4\&.13\&.
.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
\fBSECMARK \- {SAVE|RESTORE|\fR\fB\fIcontext\fR\fR\fB|?COMMENT \fR\fB\fIcomment\fR\fR\fB}\fR
.RS 4
.PP
\fBSAVE\fR
.RS 4
If an SELinux context is associated with the packet, the context is saved in the connection\&. Normally, the remaining columns should be left blank\&.
.RE
.PP
\fBRESTORE\fR
.RS 4
If an SELinux context is not currently associated with the packet, then the saved context (if any) is associated with the packet\&. Normally, the remaining columns should be left blank\&.
.RE
.PP
\fIcontext\fR
.RS 4
An SELinux context\&.
.RE
.PP
?COMMENT
.RS 4
The remainder of the line is treated as a comment which is attached to subsequent rules until another ?COMMENT line is found or until the end of the file is reached\&. To stop adding comments to rules, use a line with only the word ?COMMENT\&.
.RE
.RE
.PP
\fBCHAIN \- {P|I|F|O|T}[:{N|I|U|IU|NI|NU|NIU|NUI:E|ER}]\fR
.RS 4
This column determines the CHAIN where the SELinux context is to be applied:
.RS 4
P \- PREROUTING
.RE
.RS 4
I \- INPUT
.RE
.RS 4
F \- FORWARD
.RE
.RS 4
O \- OUTPUT
.RE
.RS 4
T \- POSTROUTING
.RE
It may be optionally followed by a colon and an indication of the Netfilter connection state(s) at which the context is to be applied:
.RS 4
:N \- NEW connection
.RE
.RS 4
:I \- INVALID connection
.RE
.RS 4
:NI \- NEW or INVALID connection
.RE
.RS 4
:E \- ESTABLISHED connection
.RE
.RS 4
:ER \- ESTABLISHED or RELATED connection
.RE
Beginning with Shorewall 4\&.5\&.10, the following additional options are available
.RS 4
:U \- UNTRACKED connection
.RE
.RS 4
:IU \- INVALID or UNTRACKED connection
.RE
.RS 4
:NU \- NEW or UNTRACKED connection
.RE
.RS 4
:NIU \- NEW, INVALID or UNTRACKED connection\&.
.RE
This column was formerly labelled CHAIN:STATE\&.
.RE
.PP
\fBSOURCE\fR \- {\fB\-\fR\fIinterface\fR|[\fIinterface\fR:]\fIaddress\-or\-range\fR[\fB,\fR\fIaddress\-or\-range\fR]\&.\&.\&.}[\fIexclusion\fR]
.RS 4
May be:
.sp
.RS 4
.ie n \{\
\h'-04' 1.\h'+01'\c
.\}
.el \{\
.sp -1
.IP "  1." 4.2
.\}
An interface name \- matches traffic entering the firewall on the specified interface\&. May not be used in classify rules or in rules using the T in the CHAIN column\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 2.\h'+01'\c
.\}
.el \{\
.sp -1
.IP "  2." 4.2
.\}
A comma\-separated list of host or network IP addresses or MAC addresses\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 3.\h'+01'\c
.\}
.el \{\
.sp -1
.IP "  3." 4.2
.\}
An interface name followed by a colon (":") followed by a comma\-separated list of host or network IP addresses or MAC addresses\&.
.RE
.sp
MAC addresses must be prefixed with "~" and use "\-" as a separator\&.
.sp
Example: ~00\-A0\-C9\-15\-39\-78
.sp
You may exclude certain hosts from the set already defined through use of an
\fIexclusion\fR
(see
\m[blue]\fBshorewall\-exclusion\fR\m[]\&\s-2\u[2]\d\s+2(5))\&.
.sp
Addresses may be specified using an ipset name preceded by \*(Aq+\*(Aq\&.
.RE
.PP
\fBDEST\fR \- {\fB\-\fR|{\fIinterface\fR|[\fIinterface\fR:]\fIaddress\-or\-range\fR[\fB,\fR\fIaddress\-or\-range\fR]\&.\&.\&.}[\fIexclusion\fR]
.RS 4
May be:
.sp
.RS 4
.ie n \{\
\h'-04' 1.\h'+01'\c
.\}
.el \{\
.sp -1
.IP "  1." 4.2
.\}
An interface name\&. May not be used in the PREROUTING or INPUT chains\&. The interface name may be optionally followed by a colon (":") and an IP address list\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 2.\h'+01'\c
.\}
.el \{\
.sp -1
.IP "  2." 4.2
.\}
A comma\-separated list of host or network IP addresses\&. The list may include ip address ranges if your kernel and iptables include iprange support\&.
.RE
.sp
You may exclude certain hosts from the set already defined through use of an
\fIexclusion\fR
(see
\m[blue]\fBshorewall\-exclusion\fR\m[]\&\s-2\u[2]\d\s+2(5))\&.
.sp
Addresses may be specified using an ipset name preceded by \*(Aq+\*(Aq\&.
.RE
.PP
\fBPROTO\fR \- {\fB\-\fR|\fBtcp:syn\fR|\fBipp2p\fR|\fBipp2p:udp\fR|\fBipp2p:all\fR|\fIprotocol\-number\fR|\fIprotocol\-name\fR|\fBall}[,\&.\&.\&.]\fR
.RS 4
See
\m[blue]\fBshorewall\-rules(5)\fR\m[]\&\s-2\u[1]\d\s+2
for details\&.
.sp
Beginning with Shorewall 4\&.5\&.12, this column can accept a comma\-separated list of protocols\&.
.RE
.PP
\fBDPORT\fR \- [\fB\-\fR|\fIport\-name\-number\-or\-range\fR[\fB,\fR\fIport\-name\-number\-or\-range\fR]\&.\&.\&.]
.RS 4
Optional 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
This column is ignored if PROTOCOL = all but must be entered if any of the following field is supplied\&. In that case, it is suggested that this field contain "\-"
.sp
This column was formerly labelled DEST PORT(S)\&.
.RE
.PP
\fBSPORT\fR \- [\fB\-\fR|\fIport\-name\-number\-or\-range\fR[\fB,\fR\fIport\-name\-number\-or\-range\fR]\&.\&.\&.]
.RS 4
Optional 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
This column was formerly labelled SOURCE PORT(S)\&.
.RE
.PP
\fBUSER\fR \- [\fB!\fR][\fIuser\-name\-or\-number\fR][\fB:\fR\fIgroup\-name\-or\-number\fR]
.RS 4
This optional column may only be non\-empty if the SOURCE is the firewall itself\&.
.sp
When this column is non\-empty, the rule applies only if the program generating the output is running under the effective
\fIuser\fR
and/or
\fIgroup\fR
specified (or is NOT running under that id if "!" is given)\&.
.sp
Examples:
.PP
joe
.RS 4
program must be run by joe
.RE
.PP
:kids
.RS 4
program must be run by a member of the \*(Aqkids\*(Aq group
.RE
.PP
!:kids
.RS 4
program must not be run by a member of the \*(Aqkids\*(Aq group
.RE
.RE
.PP
\fBMARK\fR \- [\fB!\fR]\fIvalue\fR[/\fImask\fR][\fB:C\fR]
.RS 4
Defines a test on the existing packet or connection mark\&. The rule will match only if the test returns true\&.
.sp
If you don\*(Aqt want to define a test but need to specify anything in the following columns, place a "\-" in this field\&.
.PP
!
.RS 4
Inverts the test (not equal)
.RE
.PP
\fIvalue\fR
.RS 4
Value of the packet or connection mark\&.
.RE
.PP
\fImask\fR
.RS 4
A mask to be applied to the mark before testing\&.
.RE
.PP
\fB:C\fR
.RS 4
Designates a connection mark\&. If omitted, the packet mark\*(Aqs value is tested\&.
.RE
.RE
.SH "EXAMPLE"
.PP
Mark the first incoming packet of a connection on the loopback interface and destined for address 127\&.0\&.0\&.1 and tcp port 3306 with context system_u:object_r:mysqld_t:s0 and save that context in the conntrack table\&. On subsequent input packets in the connection, set the context from the conntrack table\&.
.PP
/etc/shorewall/interfaces:
.sp
.if n \{\
.RS 4
.\}
.nf
#ZONE      INTERFACE      BROADCAST       OPTIONS
\-          lo             \-               ignore
.fi
.if n \{\
.RE
.\}
.PP
/etc/shorewall/secmarks:
.sp
.if n \{\
.RS 4
.\}
.nf
#SECMARK                              CHAIN      SOURCE  DEST       PROTO   DPORT      SPORT       USER      MARK       
system_u:object_r:mysqld_packet_t:s0  I:N        lo      127\&.0\&.0\&.1  tcp     3306
SAVE                                  I:N        lo      127\&.0\&.0\&.1  tcp     3306
RESTORE                               I:ER
.fi
.if n \{\
.RE
.\}
.SH "FILES"
.PP
/etc/shorewall/secmarks
.PP
/etc/shorewall6/secmarks
.SH "SEE ALSO"
.PP
\m[blue]\fBhttp://james\-morris\&.livejournal\&.com/11010\&.html\fR\m[]
.PP
\m[blue]\fBhttps://shorewall\&.org/configuration_file_basics\&.htm#Pairs\fR\m[]\&\s-2\u[4]\d\s+2
.PP
shorewall(8)
.SH "NOTES"
.IP " 1." 4
shorewall-rules
.RS 4
\%https://shorewall.org/manpages/shorewall-rules.html
.RE
.IP " 2." 4
shorewall-exclusion
.RS 4
\%https://shorewall.org/manpages/shorewall-exclusion.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/configuration_file_basics.htm#Pairs
.RS 4
\%https://shorewall.org/configuration_file_basics.htm#Pairs
.RE