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MAN page from OpenSuSE sysconfig-netconfig-0.85.9-150200.12.1.x86_64.rpm

NETCONFIG

Section: Network configuration (8)
Updated: October 2008
Index 

NAME

netconfig - modular tool to modify network configuration 

SYNOPSIS

netconfig modify

< -s | --service <service name> > [ -i | --interface <interface name> ] [ -F | --input-format <input/lease file format> ] [ -I | --input-file <input/lease file name> ] [ -l | --lease-file <input/lease file name> ] [ -m | --module-only < name | prefix > ] [ -f | --force-replace ] [ -v | --verbose ]

netconfig remove

< -s | --service <service name> > [ -i | --interface <interface name> ] [ -m | --module-only < name | prefix > ] [ -f | --force-replace ] [ -v | --verbose ]

netconfig update

[ -m | --module-only < name | prefix > ] [ -f | --force-replace ] [ -v | --verbose ]

netconfig< -h | --help >

 

DESCRIPTION

Netconfig is a modular tool to manage additional network configuration settings.It merges statically defined settings with settings provided by autoconfigurationmechanisms as dhcp or ppp according to a predefined policy and applies therequired changes to the system by calling netconfig modules.

Each netconfig module is responsible to apply a set of changes for instance bywriting of a configuration file and restarting a service or similar.

The netconfig tool knows three main actions:

modify
Modify the current interface and service specific dynamic settingsand update the network configuration.

Netconfig reads these settings on its standard input or from the file specifiedby the --input-file option and stores them internally until a systemreboot or the next modify or remove action. Already existing settings for thesame interface and service combination will be overwritten.See the MODIFY INPUT FORMAT section for input format description.

remove
Removes the dynamic settings provided by amodifyaction for the specifiedinterfaceandservicecombination and update the network configuration.

update
Update the network configuration using current settings. This also required whenthe policy or the static configuration in sysconfig/network/config changed.

The update can be limited to a group of modules with a common prefix or to asingle module name using the -m name-or-prefix option, for example use-m dns to apply all dns settings or -m dns-resolver to apply onlysettings handled in the dns-resolver module.Note: Especially the second call may cause inconsistent system configuration!

The netconfig policy and the static configuration settings are defined in/etc/sysconfig/network/configvariables by the administrator using YaST2, NetworkManager or manually asdefined inNETCONFIG VARIABLES section.

The dynamic configuration settings provided by autoconfiguration tools as dhcpor ppp are delivered to netconfig directly by these tools with themodifyandremovenetconfig actions.

 

NETCONFIG VARIABLES

NETCONFIG_MODULES_ORDER
This variable defines the start order of netconfig modules installedin the /etc/netconfig.d/ directory.

To disable the execution of a module, don't remove it from the listbut prepend it with a minus sign, -ntp-runtime.

NETCONFIG_<set>_POLICY
Netconfig defines a merge policy variable for each set of network settings.An empty policy variable disables any modifications in netconfig.

This variable lists the network interfaces, that netconfig has to consideras a valid source for this set of settings and in which order.

Except of complete interface names, also basic wildcards to match multipleinterfaces are allowed. For example, "eth* ppp?" will target firstall eth and then all ppp0-FIppp9 interfaces.

There are two special predefined policy values which indicate how to applythe static settings defined in the correspondingNETCONFIG_<set>_STATIC_* variables:

STATIC
the static settings have to be merged together with the dynamic settings.

STATIC_FALLBACK
the static settings have to be used only, when no dynamic are available.

By default, the policy is set to the special value auto. This specialpolicy value is resolved differently by netconfig when the NetworkManageris enabled or disabled:

NetworkManager is disabled
The auto policy value is resolved to a policy "STATIC *".

NetworkManager is enabled
The auto policy value is resolved to "STATIC_FALLBACK NetworkManager"causing to use the NetworkManager built-in merge policy with a fallback tothe static settings defined in netconfig variables when the NetworkManagerdoes not provide any.

Note:NetworkManager is not using any of the statically defined netconfig settings.
Please use the (k)nm connection editor to define yout network settings forthe NetworkManager!

 

DNS

NETCONFIG_DNS_POLICY
Defines the DNS merge policy.See also the NETCONFIG_<set>_POLICY section.
NETCONFIG_DNS_FORWARDER
The name of the DNS forwarder that has to be configured. Currentlyimplemented are "bind" (dns-bind module), "dnsmasq" (dns-dnsmasq)and "resolver" (dns-resolver module), that causes to write the nameserver IP addresses directly to /etc/resolv.conf only (no forwarder).Empty string defaults to "resolver", that is also the default setting.

See also NETCONFIG MODULES section for more information.

NETCONFIG_DNS_FORWARDER_FALLBACK
When enabled (default) in forwarder mode ("bind", "dnsmasq"), netconfigwrites an explicit localhost nameserver address to the /etc/resolv.conf,followed by the policy resolved name server list as fallback for themoments, when the local forwarder is stopped. Otherwise, the fallback iswritten only, when the NETCONFIG_DNS_STATIC_SERVERS variable contains anlocalhost address.
NETCONFIG_DNS_STATIC_SEARCHLIST
List of DNS domain names used for host-name lookup.

It is written as search list into the /etc/resolv.conf file.

NETCONFIG_DNS_STATIC_SERVERS
List of namserver IP addresses used for host-name lookup.

When the NETCONFIG_DNS_FORWARDER variable is set to "resolver", the nameservers are written directly to /etc/resolv.conf.

Otherwise, the nameserver are written into a forwarder specific configurationfile. Whether the nameservers are written as fallback to the /etc/resolv.conf,depends on the NETCONFIG_DNS_FORWARDER_FALLBACK variable.When the /etc/resolv.conf does not contain any nameservers, the glibc makesuse of the name server running on the local machine (the forwarder). See alsoNETCONFIG MODULES sectionfor more information.

NETCONFIG_DNS_RANKING
Allows to specify a custom DNS service ranking list, that is which servicesprovide preferred (e.g. vpn services), and which services fallback settings(e.g. avahi). It causes a per service sorting of the nameservers and searchlist settings.Preferred service names have to be prepended with a "+", fallbackservice names can be marked with a "-" character. Instead of theservice name also a regex is supported using +/pattern/ and -/pattern/.The special default value "auto" enables the built-in service rankinglist, currently:
    "+/vpn/ -/auto/ +strongswan +openswan +racoon -avahi"
the value "none" or "" allows to disable the ranking / sorting.
NETCONFIG_DNS_RESOLVER_OPTIONS
Allows to specify options to use when writing the /etc/resolv.conf,for example:
     "debug attempts:1 timeout:10"
See resolv.conf(5) manual page for details.
NETCONFIG_DNS_RESOLVER_SORTLIST
Allows to specify a sortlist to use when writing the /etc/resolv.conf,for example:
        "130.155.160.0/255.255.240.0 130.155.0.0"
See resolv.conf(5) manual page for details.

 

NTP

NETCONFIG_NTP_POLICY
Defines the NTP merge policy.See also the NETCONFIG_<set>_POLICY section.
NETCONFIG_NTP_STATIC_SERVERS
List of NTP server IP addresses.

 

NIS

NETCONFIG_NIS_POLICYDefines the NIS / YP merge policy.See also the NETCONFIG_<set>_POLICY section.
NETCONFIG_NIS_STATIC_DOMAIN [ _<number> ]
A NIS domain name.
NETCONFIG_NIS_STATIC_SERVERS [ _<number> ]
A list of NIS servers for the domain with same suffix number.
NETCONFIG_NIS_SETDOMAINNAME
Defines whether to set the NIS domain using a setdomainname(2) call.When enabled and the NIS domain is not provided dynamically or definedin the static netconfig variables, the domain from /etc/defaultdomainis used as fallback. Valid values are:
no
netconfig does not set the domainname at all
yes
netconfig sets the domainname according to the NIS policy using thesettings of the first interface and service which provided the NISdomainname.
<interface>
netconfig sets the domainname according to the NIS policy using thesettings of the first service which provided the NIS domainname onthe specified interface.

 

NETCONFIG MODULES

dns-resolver
This module writes the DNS settings into the /etc/resolv.conf file.

When the NETCONFIG_DNS_FORWARDER variable is empty or set to "resolver",both, the domain search list and the nameserver list is written.

Otherwise, only the domain search list is written. Whether the nameservers arewritten to the /etc/resolv.conf or handled by the forwarder specific module(e.g. bind) only, depends on the NETCONFIG_DNS_FORWARDER_FALLBACK variable.

dns-bind
This module writes the DNS nameservers as forwarders for the bind nameserverinto the /etc/named.d/forwarders.conf file. Please verify that thisfile is included in the options section of /etc/named.conf, like:
options {        #forward                first;        include                 "/etc/named.d/forwarders.conf";# [...]
You can use the yast2 dns-server module to configure bind as forwarder.
dns-dnsmasq
This module writes the DNS nameservers as forwarders for the dnsmasq nameserverinto the /run/dnsmasq-forwarders.conf file. Please verify, that thisfile is set in the resolv-file keyword in the /etc/dnsmasq.conf.
ntp-runtime
The netconfig ntp-runtime module does not alter the /etc/ntp.conf nor writesan /etc/chrony.d config file, but makes use of NTP "runtime configuration"provided by the ntp and chrony packages.

For chrony, it's written to the /run/netconfig/chrony.servers file and thechrony/helper update-daemon utility is used to apply it to the chrony daemon.For ntpd, the list of the NTP servers is written to the /run/ntp/servers-netconfigpassed to the start-ntpd addserver utility command applying it to the ntpd daemon.

nis
This module writes the NIS configuration into the /etc/ypconf file andreloads the "ypbind" service when the configuration changed.

 

MODIFY INPUT FORMAT

The netconfig modify command expects a simple, single quoted, key-valueparameter list in a dhcpcd info file compatible format. The keywords have tobe usable as variable name in a shell (identifier).The keyword INTERFACE is mandatory. The currently considered key-valuepairs are:
INTERFACE='<interface name>'IPADDR='<IP address> [/<prefix length>]'NETMASK='<network mask>'NETWORK='<network address>'BROADCAST='<broadcast address>'ROUTES='<space separated list of classless route entries>'
Each route entry consists of "network,netmask,router" addresses.GATEWAYS='<space separated list of gateway IP addresses>'DNSSEARCH='<space separated list of DNS domain names>'DNSDOMAIN='<DNS domain name>'DNSSERVERS='<space separated list of DNS nameserver addresses>'NTPSERVERS='<space separated list of ntp server addresses>'NISDOMAIN='<NIS domain name>'NISSERVERS='<list of server addresses for the NIS domain>'NETBIOSNAMESERVER='<list of netbios nameserver addresses>'

 

MODIFY VARIABLE EXAMPLES

See also the output of the dhcpcd-test <interface name> command.
Following variables are used by the current netconfig modules: 

DNS

DNSSEARCH='example.net example.com'DNSDOMAIN='example.com'DNSSERVERS='192.168.0.10 192.168.0.20'
 

NTP

NTPSERVERS='192.168.0.10 192.168.0.20'
 

NIS

NISDOMAIN='example.com'NISSERVERS='192.168.0.20 192.168.0.10'

 

BUGS

Please report bugs at <http://www.suse.de/feedback>

 

AUTHORS

Michael Calmer <mcAATTsuse.de>Marius Tomaschewski <mtAATTsuse.de>Milisav Radmanic <radmanicAATTsuse.de>

 

SEE ALSO

ifcfg(5),
/etc/sysconfig/network/config.

 

Index

NAME
SYNOPSIS
DESCRIPTION
NETCONFIG VARIABLES
DNS
NTP
NIS
NETCONFIG MODULES
MODIFY INPUT FORMAT
MODIFY VARIABLE EXAMPLES
DNS
NTP
NIS
BUGS
AUTHORS
SEE ALSO
This document was created byman2html,using the manual pages.