radvd - router advertisement daemon for IPv6
radvd [ -hsvc ] [ -d debuglevel
] [ -C configfile ] [ -p pidfile
] [ -m logmethod ] [ -l logfile
] [ -n nodaemon ] [ -f facility
] [ -t chrootdir ] [ -u username
]
radvd is the router advertisement daemon for IPv6. It
listens to router solicitations and sends router advertisements as described
in "Neighbor Discovery for IP Version 6 (IPv6)" (RFC 4861). With
these advertisements hosts can automatically configure their addresses and
some other parameters. It also defines "Neighbor Discovery Optimization
for IPv6 over Low-Power Wireless Personal Area Networks (6LoWPANs)"
(RFC6775). They also can choose a default router based on these
advertisements.
The configuration file must not be writable by others, and if
non-root operation is requested, not even by self/own group.
For every one character option there is also a long option, which
is listed right next to the "short" option name:
- -v, --version
- Displays the version of radvd and then aborts.
- -h, --help
- Displays a short usage description and then aborts.
- -c,
--configtest
- Test configuration and do startup tests and then exit.
- -n,
--nodaemon
- Prevent the daemonizing.
- -d debuglevel, --debug
debuglevel
- With this option you turn on debugging information. The debugging level is
an integer in the range from 1 to 5, from quiet to very verbose. A
debugging level of 0 completely turns off debugging. If a debugging level
greater than 0 is used, radvd doesn't background itself on start.
The default debugging level is 0.
- -C configfile, --config
configfile
- Specifies an alternate config file. Normally the compiled in default
/etc/radvd.conf is used.
- -p pidfile, --pidfile
pidfile
- Specifies an alternate pidfile. Normally the compiled in default
/run/radvd.pid is used.
- -m method, --logmethod
method
- Specifies the logging method to use. Possibly values are:
- none
- Completely disables any logging.
- logfile
- Logs to the logfile which is specified by the -l option. If no
logfile is specified on the command line, then a compiled in default is
used (see next option).
- stderr
- Logs to standard error.
- stderr_syslog
- Logs only the high messages (of at least LOG_ERR priority) to standard
error, and everything to syslog (default method).
- syslog
- Logs to syslog.
- -l logfile, --logfile
logfile
- Specifies the logfile to use when using the logging method logfile.
The default logfile is /var/log/radvd.log.
- -f facility, --facility
facility
- Specifies the facility (as an integer) when using syslog logging. Default
is LOG_DAEMON.
- -t chrootdir, --chrootdir
chrootdir
- If specified, switches to chrootdir before doing anything else.
This directory and its subdirectories must have been populated first. For
security reasons, -u must always be used when using
chrootdir.
Note that on Linux radvd requires access to the
/proc filesystem, so it is more challenging to set up the chroot
environment.
- -u username, --username
username
- If specified, drops root privileges and changes user ID to username
and group ID to the primary group of username. This is recommended
for security reasons. You might also need to use -p to point to a
file in a username -writable directory (e.g.
/var/run/radvd/radvd.pid).
/usr/sbin/radvd
/etc/radvd.conf
/run/radvd.pid
/var/log/radvd.log
There certainly are some bugs. If you find them or have other
suggestions please contact Reuben Hawkins <reubenhwk@gmail.com>.
Pedro Roque <roque@di.fc.ul.pt> - wrote first version for Linux
Lars Fenneberg <lf@elemental.net> - previous maintainer
Nathan Lutchansky <lutchann@litech.org> - previous maintainer
Pekka Savola <pekkas@netcore.fi> - previous maintainer
Craig Metz <cmetz@inner.net> - port to NRL's IPv6 code for BSD4.4
Marko Myllynen <myllynen@lut.fi> - RFC 2461 update, Mobile IPv6 support
Jim Paris <jim@jtan.com> - Privilege separation support
Reuben Hawkins <reubenhwk@gmail.com> - current maintainer
Pierre Ossman <pierre@ossman.eu> - RFC6106 (DNSSL) support
Varka Bhadram <varkabhadram@gmail.com> - 6LoWPAN-ND (RFC6775) support
Robin H. Johnson <robbat2@gentoo.org> - RA splitting per RFC 6980 & RFC4861#6.2.3