183 lines
5.5 KiB
Groff
183 lines
5.5 KiB
Groff
.\" Copyright (C) 2004, 2005 Internet Systems Consortium, Inc. ("ISC")
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.\" Copyright (C) 2000, 2001, 2003 Internet Software Consortium.
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.\"
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.\" Permission to use, copy, modify, and distribute this software for any
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.\" purpose with or without fee is hereby granted, provided that the above
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.\" copyright notice and this permission notice appear in all copies.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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.\" REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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.\" AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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.\" INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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.\" LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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.\" OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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.\" PERFORMANCE OF THIS SOFTWARE.
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.\"
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.\" $Id: named.8,v 1.17.208.6 2005/10/13 02:33:46 marka Exp $
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.\"
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.hy 0
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.ad l
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.\" ** You probably do not want to edit this file directly **
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.\" It was generated using the DocBook XSL Stylesheets (version 1.69.1).
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.\" Instead of manually editing it, you probably should edit the DocBook XML
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.\" source for it and then use the DocBook XSL Stylesheets to regenerate it.
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.TH "NAMED" "8" "June 30, 2000" "BIND9" "BIND9"
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.\" disable hyphenation
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.nh
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.\" disable justification (adjust text to left margin only)
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.ad l
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.SH "NAME"
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named \- Internet domain name server
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.SH "SYNOPSIS"
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.HP 6
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\fBnamed\fR [\fB\-4\fR] [\fB\-6\fR] [\fB\-c\ \fR\fB\fIconfig\-file\fR\fR] [\fB\-d\ \fR\fB\fIdebug\-level\fR\fR] [\fB\-f\fR] [\fB\-g\fR] [\fB\-n\ \fR\fB\fI#cpus\fR\fR] [\fB\-p\ \fR\fB\fIport\fR\fR] [\fB\-s\fR] [\fB\-t\ \fR\fB\fIdirectory\fR\fR] [\fB\-u\ \fR\fB\fIuser\fR\fR] [\fB\-v\fR] [\fB\-x\ \fR\fB\fIcache\-file\fR\fR]
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.SH "DESCRIPTION"
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.PP
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\fBnamed\fR
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is a Domain Name System (DNS) server, part of the BIND 9 distribution from ISC. For more information on the DNS, see RFCs 1033, 1034, and 1035.
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.PP
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When invoked without arguments,
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\fBnamed\fR
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will read the default configuration file
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\fI/etc/named.conf\fR, read any initial data, and listen for queries.
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.SH "OPTIONS"
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.TP
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\-4
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Use IPv4 only even if the host machine is capable of IPv6.
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\fB\-4\fR
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and
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\fB\-6\fR
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are mutually exclusive.
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.TP
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\-6
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Use IPv6 only even if the host machine is capable of IPv4.
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\fB\-4\fR
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and
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\fB\-6\fR
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are mutually exclusive.
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.TP
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\-c \fIconfig\-file\fR
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Use
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\fIconfig\-file\fR
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as the configuration file instead of the default,
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\fI/etc/named.conf\fR. To ensure that reloading the configuration file continues to work after the server has changed its working directory due to to a possible
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\fBdirectory\fR
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option in the configuration file,
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\fIconfig\-file\fR
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should be an absolute pathname.
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.TP
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\-d \fIdebug\-level\fR
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Set the daemon's debug level to
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\fIdebug\-level\fR. Debugging traces from
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\fBnamed\fR
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become more verbose as the debug level increases.
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.TP
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\-f
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Run the server in the foreground (i.e. do not daemonize).
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.TP
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\-g
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Run the server in the foreground and force all logging to
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\fIstderr\fR.
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.TP
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\-n \fI#cpus\fR
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Create
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\fI#cpus\fR
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worker threads to take advantage of multiple CPUs. If not specified,
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\fBnamed\fR
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will try to determine the number of CPUs present and create one thread per CPU. If it is unable to determine the number of CPUs, a single worker thread will be created.
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.TP
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\-p \fIport\fR
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Listen for queries on port
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\fIport\fR. If not specified, the default is port 53.
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.TP
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\-s
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Write memory usage statistics to
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\fIstdout\fR
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on exit.
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.RS
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.B "Note:"
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This option is mainly of interest to BIND 9 developers and may be removed or changed in a future release.
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.RE
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.TP
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\-t \fIdirectory\fR
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\fBchroot()\fR
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to
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\fIdirectory\fR
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after processing the command line arguments, but before reading the configuration file.
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.RS
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.B "Warning:"
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This option should be used in conjunction with the
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\fB\-u\fR
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option, as chrooting a process running as root doesn't enhance security on most systems; the way
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\fBchroot()\fR
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is defined allows a process with root privileges to escape a chroot jail.
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.RE
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.TP
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\-u \fIuser\fR
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\fBsetuid()\fR
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to
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\fIuser\fR
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after completing privileged operations, such as creating sockets that listen on privileged ports.
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.RS
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.B "Note:"
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On Linux,
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\fBnamed\fR
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uses the kernel's capability mechanism to drop all root privileges except the ability to
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\fBbind()\fR
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to a privileged port and set process resource limits. Unfortunately, this means that the
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\fB\-u\fR
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option only works when
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\fBnamed\fR
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is run on kernel 2.2.18 or later, or kernel 2.3.99\-pre3 or later, since previous kernels did not allow privileges to be retained after
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\fBsetuid()\fR.
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.RE
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.TP
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\-v
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Report the version number and exit.
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.TP
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\-x \fIcache\-file\fR
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Load data from
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\fIcache\-file\fR
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into the cache of the default view.
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.RS
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.B "Warning:"
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This option must not be used. It is only of interest to BIND 9 developers and may be removed or changed in a future release.
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.RE
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.SH "SIGNALS"
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.PP
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In routine operation, signals should not be used to control the nameserver;
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\fBrndc\fR
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should be used instead.
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.TP
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SIGHUP
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Force a reload of the server.
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.TP
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SIGINT, SIGTERM
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Shut down the server.
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.PP
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The result of sending any other signals to the server is undefined.
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.SH "CONFIGURATION"
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.PP
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The
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\fBnamed\fR
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configuration file is too complex to describe in detail here. A complete description is provided in the
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BIND 9 Administrator Reference Manual.
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.SH "FILES"
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.TP
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\fI/etc/named.conf\fR
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The default configuration file.
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.TP
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\fI/var/run/named.pid\fR
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The default process\-id file.
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.SH "SEE ALSO"
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.PP
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RFC 1033,
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RFC 1034,
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RFC 1035,
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\fBrndc\fR(8),
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\fBlwresd\fR(8),
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BIND 9 Administrator Reference Manual.
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.SH "AUTHOR"
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.PP
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Internet Systems Consortium
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