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Editing: sysconfig.txt
======================= Generic options: /etc/sysconfig/authconfig used by authconfig to store information about the system's user information and authentication setup; changes made to this file have no effect until the next time authconfig is run USEHESIOD=no Whether or not the hesiod naming service is in use. If not set, authconfig examines the passwd setting in /etc/nsswitch.conf. USELDAP=no Whether or not LDAP is used as a naming service. If not set, authconfig examines the passwd setting in /etc/nsswitch.conf. USENIS=no Whether or not NIS is in use. If not set, authconfig examines the passwd setting in /etc/nsswitch.conf. USEKERBEROS=no Whether or not Kerberos is in use. If not set, authconfig examines the settings in /etc/pam.d/system-auth. USELDAPAUTH=no Whether or not LDAP is being used for authentication. If not set, authconfig examines the settings in /etc/pam.d/system-auth. Note that this option is separate from USELDAP, and that neither implies the other. USEMD5=no Whether or not MD5-based hashing should be used when setting passwords. If not set, authconfig examines the settings in /etc/pam.d/system-auth. This option affects authentication using both local files and LDAP. USESHADOW=no Whether or not shadow passwords are in use. If not set, authconfig checks for the existence of /etc/shadow. USESMBAUTH=no Whether or not SMB authentication is in use. If not set, authconfig examines the settings in /etc/pam.d/system-auth. /etc/sysconfig/autofsck does not normally exist; if it does, it can influence a choice whether or not to fsck after a crash AUTOFSCK_DEF_CHECK=no If the user does not respond, choose whether or not to fsck AUTOFSCK_SINGLEUSER= If this is set, drop to single user mode before fsck. /etc/sysconfig/init: BOOTUP=<some bootup mode> BOOTUP=graphical means use X Windows graphical boot up BOOTUP=color means colorized text mode boot display. BOOTUP=verbose means old style display Anything else means simplified display, but without color or ANSI-formatting LOGLEVEL=<a number> Sets the initial console logging level for the kernel. The default is 7. 8 means everything (including debugging); 1 means nothing except kernel panics. syslogd will override this once it starts. RES_COL=<a number> Column of the screen to start status labels at. Defaults to 60 MOVE_TO_COL=<a command> A command to move the cursor to $RES_COL. Defaults to nasty ANSI sequences output by echo -e. SETCOLOR_SUCCESS=<a command> A command to set the color to a color indicating success. Defaults to nasty ANSI sequences output by echo -e setting the color to green. SETCOLOR_FAILURE=<a command> A command to set the color to a color indicating failure. Defaults to nasty ANSI sequences output by echo -e setting the color to red. SETCOLOR_WARNING=<a command> A command to set the color to a color indicating warning. Defaults to nasty ANSI sequences output by echo -e setting the color to yellow. SETCOLOR_NORMAL=<a command> A command to set the color to 'normal'. Defaults to nasty ANSI sequences output by echo -e. PROMPT=yes|no Set to 'yes' to enable the key check for interactive mode as well as asking if a filesystem check should be done. Default is 'no' and the kernel command line option "forcefsck" can be used to check the filesystems and "confirm" can be used to enable interactive startup questions. obsoleted values from earlier releases: MAGIC_SYSRQ=yes|no Setting this to 'no' used to disable the magic sysrq key and Stop-A (break on serial console) on SPARC. This setting has been moved into kernel.sysrq and kernel.stop-a settings respectively in sysctl.d/00-system.conf. Setting either of them there to 0 disables it, setting it to 1 enables it. STOP_A=yes|no Setting this to 'no' used to disable the Stop-A (break on serial console) key on SPARC. This setting has been moved into kernel.stop-a setting in sysctl.d/00-system.conf. Setting it there to 0 disables it, setting it to 1 enables it. The setting should be present on SPARC only. /etc/sysconfig/keyboard: KEYTABLE=<keytable file> for example: KEYTABLE="/usr/lib/kbd/keytables/us.map" If you dump a keymap (using 'dumpkeys') to /etc/sysconfig/console/default.kmap it will be loaded on bootup before filesystems are mounted/checked. This could be useful if you need to emergency type the root password. This has to be a dumped keymap, as opposed to copying the shipped keymap files, as the shipped files include other maps from the /usr/lib/kbd/keytables directory. KEYBOARDTYPE=sun|pc on SPARC only, sun means a sun keyboard is attached on /dev/kbd, pc means a PS/2 keyboard is on ps/2 port. /etc/sysconfig/mouse: MOUSETYPE=microsoft|mouseman|mousesystems|ps/2|msbm|logibm|atibm| logitech|mmseries|mmhittab XEMU3=yes|no (emulate three buttons with two buttons whenever necessary, most notably in X) DEVICE=<a device node> (the device of the mouse) In addition, /dev/mouse points to the mouse device. /etc/sysconfig/network: NETWORKING=yes|no GATEWAY=<gateway IP> GATEWAYDEV=<gateway device to use, when multiple devices have GATEWAY=> (e.g. eth0) NISDOMAIN=<nis domain name> NOZEROCONF= Set this to not set a route for dynamic link-local addresses. NETWORKDELAY=<delay in seconds> Delay in seconds after all network interfaces are initialized. Useful if network has spanning tree running and must wait for STP convergence. Default: 0 (no delay) WAIT_UNTIL_REACHABLE=<IP address|DNS name> Network initscript will wait until specified target is reachable. It starts to reaching passed IP address or DNS name every second until it reach it sucessfully or until it reach preset delay NETWORKDELAY (default 30). It works with both IPv4 and IPv6 adress and also with DNS name. Example: WAIT_UNTIL_REACHABLE=8.8.8.8 Default: (not set) RES_OPTIONS=<list of resolv.conf options> RES_OPTIONS contains space-separated list of resolver options as explained in resolv.conf(5). Example: RES_OPTIONS="rotate timeout:1 retries:1" this will be presented in /etc/resolv.conf like "options rotate timeout:1 retries:1" IFDOWN_ON_SHUTDOWN=yes|no If yes, do bring interfaces down during system shutdown. If no, leave them in their current state (this is only supported on hosts using systemd). Default: yes (bring interfaces down) IPV6FORWARDING=yes|no Enable or disable global forwarding of incoming IPv6 packets on all interfaces. Note: Actual packet forwarding cannot be controlled per-device, use netfilter6 for such issues Default: no IPV6_AUTOCONF=yes|no Sets the default for device-based autoconfiguration. Default: yes if IPV6FORWARDING=no, no if IPV6FORWARDING=yes IPV6_ROUTER=yes|no Sets the default for device-based Host/Router behaviour. Default: yes if IPV6FORWARDING=yes, no if IPV6FORWARDING=no IPV6_AUTOTUNNEL=yes|no Controls automatic IPv6 tunneling. Default: no IPV6_DEFAULTGW=<IPv6 address[%interface]> (optional) Add a default route through specified gateway An interface can be specified: required for link-local addresses Examples: IPV6_DEFAULTGW="3ffe:ffff:1234:5678::1" Add default route through 3ffe:ffff:1234:5678::1 IPV6_DEFAULTGW="3ffe:ffff:1234:5678::1%eth0" Add default route through 3ffe:ffff:1234:5678::1 and device eth0 IPV6_DEFAULTGW="fe80::1%eth0" Add default route through fe80::1 and device eth0 Note: if IPV6_DEFAULTGW is specified with %interface scope and it doesn't match IPV6_DEFAULTDEV, IPV6_DEFAULTDEV is ignored. Note: it's preferred to use %interface for all addresses, not just link-local if you have multiple IPv6-enabled interfaces. IPV6_DEFAULTDEV=<interface> (optional) Add a default route through specified interface without specifying next hop Type of interface will be tested whether this is allowed Examples: IPV6_DEFAULTDEV="eth0" INVALID example! IPV6_DEFAULTDEV="ppp0" IPV6_DEFAULTDEV="sit1" Examples for 6to4 IPV6_DEFAULTDEV="tun6to4" Add default route through dedicated 6to4 tunnel device "tun6to4", if configured Note: "tun6to4" does not support an additional IPV6_DEFAULTGW. Other interfaces prefer IPV6_DEFAULTGW, if specified. IPV6_RADVD_PIDFILE=<pid-file> (optional) Location of PID file for controlling radvd, see IPV6_CONTROL_RADVD Default: "/run/radvd/radvd.pid" Example: IPV6_RADVD_PIDFILE="/some/other/location/radvd.pid" IPV6TO4_RADVD_PIDFILE=<pid-file> (obsolete) As above, still supported for a while for backward compatibility. IPV6_RADVD_TRIGGER_ACTION=startstop|reload|restart|SIGHUP (optional) How to trigger radvd in case of 6to4 or PPP action startstop: radvd starts if interface goes up and stops if interface goes down using initscript call of radvd with related parameter reload|restart: initscript of radvd is called with this parameter SIGHUP: signal HUP is sent to radvd, pidfile must be specified, if not the default Default: SIGHUP IPv6 options above can be overridden in interface-specific configuration. obsoleted values from earlier releases: FORWARD_IPV4=yes|no Create a new file in /etc/sysctl.d/ with the net.ipv4.ip_forward setting instead. Setting it to 1 there enables IP forwarding, setting it to 0 disables it (which is the default for RFC compliance). NETWORKWAIT=yes|no This is not used with the move to systemd. HOSTNAME=<fqdn by default, but whatever hostname you want> This is now configured in /etc/hostname. /etc/sysconfig/static-routes-ipv6: Contains lines of the form: <device> IPv6-network IPv6-gateway <tunneldevice> IPv6-network <device> must be a device name to have the route brought up and down with the device For example: eth0 fec0:0:0:2::/64 fec0:0:0:1:0:0:0:20 adds a route for IPv6 network fec0:0:0:2::/64 through fec0:0:0:1:0:0:0:20 eth0 2000::/3 3ffe:ffff:0:1::1 so-called "default" routes for clients sit1 2000::/3 adds routes through dedicated tunnel interface sit1 tun6to4 3ffe:ffff:1234::/56 adds routes through hardwired 6to4 tunnel interface tun6to4 tun6to4 3ffe:ffff:5678::/56 ::5.6.7.8 adds routes through hardwired 6to4 tunnel interface tun6to4, specifying next hop Notes: * default routes (such as the "2000::/3" shown above) should be set with IPV6_DEFAULTGW and IPV6_DEFAULTDEV, see more above. * tunnel device "sit0" is not supported here, routes will never be applied /etc/sysconfig/routed: SILENT=yes|no EXPORT_GATEWAY=yes|no /etc/sysconfig/rawdevices: This is used for setting up raw device to block device mappings. It has the format: <rawdev> <major> <minor> <rawdev> <blockdev> For example: /dev/raw/raw1 /dev/sda1 /dev/raw/raw2 8 5 /etc/sysconfig/pcmcia: PCMCIA=yes|no PCIC=i82365|tcic PCIC_OPTS=<socket driver (i82365 or tcic) timing parameters> CORE_OPTS=<pcmcia_core options> CARDMGR_OPTS=<cardmgr options> /etc/sysconfig/amd: ADIR=/.automount (normally never changed) MOUNTPTS='/net /etc/amd.conf' (standard automount stuff) AMDOPTS= (extra options for AMD) /etc/sysconfig/tape: DEV=/dev/nst0 Tape device. Use the non-rewinding one for these scripts. For SCSI tapes this is /dev/nst#, where # is the number of the tape drive you want to use. If you only have one then use nst0. For IDE tapes you use /dev/ht#, where # is the number of the tape drive you want to use (usually ht0). For floppy tape drives use /dev/ftape. ADMIN=root Person to mail to if the backup fails for any reason SLEEP=5 Time to sleep between tape operations. Some drives need a bit more than others, but 5 seems to work for 8mm, 4mm, and DLT BLOCKSIZE=32768 This worked fine for 8mm, then 4mm, and now DLT. An optimal setting is probably however much data your drive writes at one time. SHORTDATE=$(date +%y:%m:%d:%H:%M) A short date string, used in backup log filenames. DAY=$(date +log-%y:%m:%d) This is used for the log file directory. DATE=$(date) Regular date string, used in log files. LOGROOT=/var/log/backup Root of the logging directory LIST=$LOGROOT/incremental-list This is the file name the incremental backup will use to store the incremental list. It will be $LIST-{some number}. DOTCOUNT=$LOGROOT/.count For counting as you go to know which incremental list to use COUNTER=$LOGROOT/counter-file For rewinding when done...might not use. BACKUPTAB=/etc/backuptab The file in which we keep our list of backup(s) we want to make. /etc/sysconfig/saslauthd: used by the saslauthd init script (part of the cyrus-sasl package) to control which arguments are passed to saslauthd at startup time; changes made to this file have no effect until saslauthd is restarted MECH=shadow controls which data source saslauthd will consult when checking user passwords; run 'saslauthd -v' to get a full list of available authentication mechanisms SOCKETDIR=/run/saslauthd controls in which directory saslauthd will be directed to create its listening socket; any change to this value will require a corresponding change in client configuration files /etc/sysconfig/sendmail: DAEMON=yes|no yes implies -bd (i.e., listen on port 25 for new mail) QUEUE=1h given to sendmail as -q$QUEUE -q option is not given to sendmail if /etc/sysconfig/sendmail exists and QUEUE is empty or undefined. Files in /etc/sysconfig/network-scripts/ ======================================== /etc/sysconfig/network-scripts/ifup: /etc/sysconfig/network-scripts/ifdown: Symlinks to /sbin/ifup and /sbin/ifdown, respectively. These are the only two scripts "in" this directory that should be called directly; these two scripts call all the other scripts as needed. These symlinks are here for legacy purposes -- only /sbin/ifup and /sbin/ifdown should currently be used at the user level. These scripts take one argument normally: the name of the device (e.g. eth0). They are called with a second argument of "boot" during the boot sequence so that devices that are not meant to be brought up on boot (ONBOOT=no, see below) can be ignored at that time. Also, interfaces may be brought up via the hotplug scripts; in this case, HOTPLUG=no needs to be set to no to avoid this. This is useful e.g. to prevent bonding device activation by merely loading the bonding kernel module. /etc/sysconfig/network-scripts/init.ipv6-global: Not really a public file. Contains different basic settings that are set from /etc/[rc.d]/init.d/network at different stages of network initialization. /etc/sysconfig/network-scripts/network-functions: Not really a public file. Contains functions which the scripts use for bringing interfaces up and down. In particular, it contains most of the code for handling alternative interface configurations. /etc/sysconfig/network-scripts/network-functions-ipv6: Not really a public file. Contains functions which the scripts use for bringing IPv6 on interfaces up and down, like addresses, routes, forwarding handling and static or automatic tunneling. /etc/sysconfig/network-scripts/ifcfg-<interface-name> and /etc/sysconfig/network-scripts/ifcfg-<interface-name>:<alias-name>: The first defines an interface, and the second contains only the parts of the definition that are different in a "alias" (or alternative) interface. For example, the network numbers might be different, but everything else might be the same, so only the network numbers would be in the alias file, but all the device information would be in the base ifcfg file. The items that can be defined in an ifcfg file depend on the interface type. The really obvious ones I'm not going to bother to define; you can figure out what "IPADDR" is, I think... :-) Base items: NAME=<friendly name for users to see> Most important for PPP. Only used in front ends. DEVICE=<name of physical device (except dynamically-allocated PPP devices where it is the "logical name")> IPADDRn= PREFIXn= Network prefix. It is used for all configurations except aliases and ippp devices. It takes precedence over NETMASK when both PREFIX and NETMASK are set. NETMASKn= Subnet mask; just useful for aliases and ippp devices. For all other configurations, use PREFIX instead. The "n" is expected to be consecutive positive integers starting from 0. It can be omitted if there is only one address being configured. GATEWAY= METRIC= Metric for the default route using GATEWAY ONBOOT=yes|no (not valid for alias devices; use ONPARENT) HOTPLUG=yes|no USERCTL=yes|no BOOTPROTO=none|bootp|dhcp 'bootp' or 'dhcp' cause a DHCP client to run on the device. Any other value causes any static configuration in the file to be applied. VLAN=yes|no MTU= Default MTU for this device WINDOW= Default window for routes from this device PEERDNS=yes|no modify /etc/resolv.conf if peer uses msdns extension (PPP only) or DNS{1,2} are set, or if using dhclient. default to "yes". DNS{1,2}=<ip address> provide DNS addresses that are dropped into the resolv.conf file if PEERDNS is not set to "no". SCOPE= Set to "scope SCOPE-ID" to set a non-default scope for a statically configured IP address. SRCADDR= use the specified source address for outgoing packets HWADDR= ethernet hardware address for this device MACADDR= Set the hardware address for this device to this. Use of this in conjunction with HWADDR= may cause unintended behavior. NOZEROCONF= Set this to not set a route for dynamic link-local addresses over this device. LINKSTATUS=up|down Setting LINKSTATUS to down prevents network-scripts from bringing up interface. This prevents issues with interfaces like Open vSwitch bridges which uses userspace datapaths. If not set defaults to up. PERSISTENT_DHCLIENT=yes|no|1|0 Without this option, or if it is 'no'/'0', and BOOTPROTO=dhcp, dhclient is run for the interface in "one-shot" mode; if the dhcp server does not respond for a configurable timeout, then dhclient exits and the interface is not brought up - the '-1' option is given to dhclient. If PERSISTENT_DHCLIENT=yes, then dhclient will keep on trying to contact the dhcp server when it does not respond - no '-1' option is given to dhclient. Note: this disables the automatic checking for the presence of a link before starting dhclient. DHCPRELEASE=yes|no|1|0 With this option set to 'yes' (1), when a dhcp configured interface is brought down with 'ifdown', the lease will be released. Otherwise, leases are not released. NO_DHCP_HOSTNAME=yes|no|1|0 Tells initscripts to not obtain hostname from DHCP server in the ifup-post phase. This option might be useful especially with static configuration of the interface. DHCP_SEND_HOSTNAME=yes|no|1|0 Tells initscripts whether the DHCP_HOSTNAME or DHCP_FQDN options (below) should be sent to DHCP server. DHCP_HOSTNAME=<hostname> Sends the specified hostname to the DHCP server. DHCP_FQDN=<fully.qualified.domain.name> Sends the specified FQDN to the DHCP server. Please note when both DHCP_HOSTNAME and DHCP_FQDN are specified, only DHCP_FQDN will be used. (Same behaviour as with NetworkManager.) DHCLIENT_IGNORE_GATEWAY=yes|no|1|0 If set to 'yes', it will cause dhclient-script to ignore any $GATEWAY setting that may be in the ifcfg file for this interface. Otherwise, the dhclient session which obtains an ip-address on the same subnet as $GATEWAY will set the default route to be via $GATEWAY, and no other dhclient session will set the default route. DHCLIENTARGS= Any additional arguments to dhclient. NM_CONTROLLED=yes|no If set to 'no', NetworkManager will ignore this connection/device. Defaults to 'yes'. ZONE= Network zone (trust level) of this connection. If not set, default zone (specified in /etc/firewalld/firewalld.conf) is used. To see all available zones, run 'firewall-cmd --get-zones'. ARPCHECKn=yes|no If set to 'no', ifup will not try to determine, if requested ip address is used by other machine in network. Defaults to 'yes'. ARPING_WAIT=<number> Number of seconds for which will be arping trying to determine, if requested ip address is used in network. This option works with ARPCHECKn=yes If not set default is 3 sec. example: ARPING_WAIT=1 ARPUPDATE=yes|no If set to 'no' the neighbours in current network will not be updated with ARP information about this NIC. This is especially handy using LVS Load Balancing with Direct Routing enabled. Defaults to 'yes'. ARPING_UPDATE_WAIT=<number> Number of seconds for which will be arping trying to update arp cache of neighbours with ARP informations about this NIC. This option works with ARPUPDATE=yes. If not set default is 3 sec. example: ARPING_UPDATE_WAIT=1 IPV4_FAILURE_FATAL=yes|no If set to yes, ifup-eth will end immediately after ipv4 dhclient fails. Defaults to 'no'. For dynamic addressing (BOOTPROTO=dhcp) only DEVICE needs to be set; all the rest will be determined by the boot protocol. IPV6_SET_SYSCTLS=yes|no If set, network-scripts will attempt to set sysctls based on the setup of the interface. For example, will try to set `accept_ra` for interfaces where $IPV6_AUTOCONF is set to `yes`. Defaults to `yes`, set to `no` if you want to manage these yourself. Base items being deprecated: NETWORK=<will be calculated automatically with ipcalc> BROADCAST=<will be calculated automatically with ipcalc> Alias specific items: ONPARENT=yes|no Whether to bring up the device when the parent device is brought up. Default: yes IPv6-only items for real interfaces: IPV6INIT=yes|no Enable or disable IPv6 static, DHCP, or autoconf configuration for this interface Default: yes IPV6FORWARDING=yes|no Enable or disable global forwarding of incoming IPv6 packets Note: Obsolete in interface specification! Default: no IPV6ADDR=<IPv6 address>[/<prefix length>] Specify a primary static IPv6 address here Optional, if normal host and a router advertisement daemon is on local link Required, if node is a router and interface should route packets Note: if prefix length is omitted, 64 is assumed Example: IPV6ADDR="3ffe:ffff:0:5::1" IPV6ADDR="3ffe:ffff:0:1::1/128" IPV6ADDR_SECONDARIES="<IPv6 address>[/<prefix length>] ..." (optional) A list of secondary IPv6 addresses (e.g. useful for virtual hosting) Example: IPV6ADDR_SECONDARIES="3ffe:ffff:0:1::10 3ffe:ffff:0:2::11/128" IPV6_MTU=<MTU of link> (optional) Optional, dedicated MTU of this link Note: Must be greater or equal to 1280. Example: IPV6_MTU="1280" IPV6_PRIVACY=rfc3041 Enables RFC 3041 IPv6 privacy support if set. Default: RFC 3041 support disabled IPV6_FORCE_ACCEPT_RA=yes|no By default network-scripts will set `accept_ra` only if $IPV6_AUTOCONF is set to `yes`. If you don't want SLAAC addresses but do want to accept RA, then set this to `yes`. Defaults to `no`. PERSISTENT_DHCLIENT_IPV6=yes|no|1|0 Without this option, or if it is 'no'/'0', and DHCPV6C=yes, 'dhclient -6' is run for the interface in "one-shot" mode; if the DHCPv6 server does not respond for a configurable timeout, then 'dhclient -6' exits and the interface is not brought up - the '-1' option is given to 'dhclient -6'. If PERSISTENT_DHCLIENT_IPV6=yes, then dhclient will keep on trying to contact the DHCPv6 server when it does not respond - no '-1' option is given to 'dhclienti -6'. Special configuration options for multi-homed hosts etc. IPV6_ROUTER=yes|no: Controls IPv6 autoconfiguration IPV6_AUTOCONF=yes|no: Controls IPv6 autoconfiguration Defaults: Global IPV6FORWARDING=yes: IPV6_AUTOCONF=no, IPV6_ROUTER=yes Global IPV6FORWARDING=no: IPV6_AUTOCONF=yes Optional settings for a 6to4 tunnel IPV6TO4INIT=yes|no Enable or disable 6to4 tunneling setup Default: no IPV6TO4_RELAY=<IPv4 address> (optional) IPv4 address of the remote 6to4 relay Note: if this is omitted, ::192.88.99.1 (the anycast relay address) is chosen IPV6TO4_IPV4ADDR=<IPv6 address>[/<prefix length>] (optional) Overwrite local IPv4 address which is accessible from the Internet (optional, in case of static IPv4-NAT behind a router or other special scenarios) IPV6TO4_MTU=<MTU for IPv6> (optional) Controls IPv6 MTU for the 6to4 tunnel Note: Must be greater or equal to 1280 Example: IPV6TO4_MTU="1280" Default: MTU of master device - 20 IPV6TO4_ROUTING="<device>-<suffix>/<prefix length> ..." (optional) A list of routing tokens to setup proper IPv6 interfaces on the LAN Example: IPV6TO4_ROUTING="eth0-:0004::1/64 eth1-:0005::1/64" Will create one address per eth0 and eth1, taking given SLA Optional settings for a 6to4 tunnel or a ppp link IPV6_CONTROL_RADVD=yes|no (optional) Enable signaling radvd that the 6to4 prefix has been changed or a preconfigured dynamic device is up or down Default: no IPv6-only items for static tunnel interface: Interface name: sitX (X => 1) IPV6INIT=yes|no Enable or disable IPv6 configuration for this interface Default: no IPV6TUNNELIPV4=<IPv4 address> Specify IPv4 address of a foreign IPv6-in-IPv4 tunnel endpoint Example: IPV6TUNNELIPV4="1.2.3.4" IPV6TUNNELIPV4LOCAL=<IPv4 address> Specify local IPv4 address of tunnel, useful on interfaces with multiple IPv4 addresses IPV6ADDR=<IPv6 address>[/<prefix length>] (optional) local IPv6 address of a numbered tunnel IPV6ADDR_SECONDARIES="<IPv6 address>[/<prefix length>] ..." (optional) A list of secondary IPv6 addresses (example see above) IPV6_MTU=<MTU of tunnel> (optional) Optional, dedicated MTU of this tunnel Note: Must be greater or equal to 1280 Example: IPV6_MTU="1280" IPv6-only option to enable DHCPv6 client: DHCPV6C=yes|no This will enable the DHCPv6 features of dhclient to be run for the interface. See man dhclient(8) and dhclient.conf(5). DHCPV6C_OPTIONS=... This will pass given arguments to the DHCPv6 client. For example, "-S" option will request network information (e.g., DNS addresses) only, not IPv6 addresses. Ethernet-only items: ARP=yes|no (adds 'arp' flag to ip, for use with the ethertap device) LINKDELAY=<time in seconds> Time that the system should pause after the specific interface is enabled. This may be useful if one interface is connected to a switch which has spanning tree enabled and must wait for STP to converge before the interface should be considered usable. BRIDGE=<br* device> If set, the ethernet device is not assigned an address. It is added to the specified bridge device instead. EXTRA_ROUTE_OPTS=<string of route options> Extra options to add to the interface route. For example, let's say you wanted an interface route to have an mtu of 1480, but wanted the interface to still have a route of 1500, you could set "mtu 1480" here. Anything here is appended to the `ip route add` or `ip route replace` command. Deprecated, but supported: ETHTOOL_OPTS=... Any device-specific options supported by ethtool. For example, if you wanted to force 100Mb full duplex: ETHTOOL_OPTS="speed 100 duplex full autoneg off" Note that changing speed or duplex settings almost always requires disabling autonegotiation with 'autoneg off'. Multiple options can also be set like so : ETHTOOL_OPTS="-K ${DEVICE} tso on; -G ${DEVICE} rx 256 tx 256" Long term, this should be done by sysadmin-written udev rules. No longer supported: PROMISC=yes|no (enable or disable promiscuous mode) ALLMULTI=yes|no (enable or disable all-multicast mode) To properly set these, use the packet socket interface. Ethernet 802.1q VLAN items: DEVICE=eth0.42 Initscripts use the device name for VLAN devices. Example: eth0.42 for vlan 42 on device eth0. Valid VLAN ID range is 0-4095. Most ethernet switches reserve VLAN ID 1 to be used as management VLAN; starting from VLAN ID 2 is recommended. REORDER_HDR=yes|no When enabled the VLAN device will move the ethernet header around to make it look exactly like a real ethernet device. This may help programs such as ISC dhcpd which read the raw ethernet packet and make assumptions about the location of bytes. If you don't need it turn it off because there is a small performance penalty. Default is on. GVRP=yes|no When enabled, this will announce new vlan creation to a GVRP enabled trunk port on a switch. Default is off. PPP/SLIP items: PERSIST=yes|no MODEMPORT=<device, say /dev/modem> LINESPEED=<speed, say 115200> DEFABORT=yes|no (tells netcfg whether or not to put default abort strings in when creating/editing the chat script and/or dip script for this interface) (meaningless with WVDIALSECT) PPP-specific items WVDIALSECT=<list of sections from wvdial.conf to use> If this variable is set, then the chat script (if it exists) is ignored, and wvdial is used to open the PPP connection. DEFROUTE=yes|no (set this interface as default route? yes is default) DEBUG=yes|no (defaults to yes) turns on/off pppd and chat (if used) debugging. ESCAPECHARS=yes|no (simplified interface here doesn't let people specify which characters to escape; almost everyone can use asyncmap 00000000 anyway, and they can set PPPOPTIONS to asyncmap foobar if they want to set options perfectly) HARDFLOWCTL=yes|no (yes implies "modem crtscts" options) PPPOPTIONS=<arbitrary option string; is placed last on the command line, so it can override other options like asyncmap that were specified differently> PPPOE_EXTRA = any extra arguments to pass to pppoe PPPD_EXTRA = any extra arguments to pass to pppd PAPNAME=<"name $PAPNAME" on pppd command line> (note that the "remotename" option is always specified as the logical ppp device name, like "ppp0" (which might perhaps be the physical device ppp1 if some other ppp device was brought up earlier...), which makes it easy to manage pap/chap files -- name/password pairs are associated with the logical ppp device name so that they can be managed together. REMIP=<remote ip address, normally unspecified> MTU= MRU= DISCONNECTTIMEOUT=<number of seconds, default currently 5> (time to wait before re-establishing the connection after a successfully-connected session terminates before attempting to establish a new connection.) RETRYTIMEOUT=<number of seconds, default currently 60> (time to wait before re-attempting to establish a connection after a previous attempt fails.) RETRYCONNECT=yes|no (defaults to yes) If this is yes, then we will re-run pppd if it exits with a "connect script failed" status. Otherwise, only one attempt is made to bring up the connection. Note that some connect scripts (for example, wvdial) might do their own retries (such as BUSY or NO DIALTONE conditions). MAXFAIL=<number> If this is set, this will cause ppp-watch to exit after the specified number of attempts. DEMAND=yes|no Switches on demand-dialing mode using pppd's "demand" option. IDLETIMEOUT=600 The amount of time the link needs to be inactive before pppd will bring it down automatically. BOOTTIMEOUT=30 The amount of time to wait at boot before giving up on the connection. IPPP-specific items (ISDN) PROVIDER=<ProviderName> USER=<Login> PASSWORD=<Password> ENCAP=[syncppp|] DIALMODE=[manual|auto] SECURE=off|on MSN=<> PHONE_IN=<Callback.Number> AREACODE=<> REGIONCODE=<> PHONE_OUT=<PhoneNumber> BUNDLING=off|on HUPTIMEOUT=<number> DNS1=<PrimaryDNS> DNS2=<SecondaryDNS> DOMAIN="" LAYER=[HDLC|] CALLBACK=off|on CHARGEHUP=<number> CHARGEINT=<number> CBHUP=<number> CBDELAY=<number> DIALMAX=<number> AUTH=[+pap] [-chap] IHUP=<> DELDEFAULTROUTE=[enabled|disabled] CBCP=off|on VJ=off|on VJCCOMP=off|on AC=off|on PC=off|on BSDCOMP=off|on CCP=off|on SLAVE_DEVICE=ippp[0-9] ippp0 items being deprecated: BOOT=[on|off] will be converted to ONBOOT=[yes|no] by netconf LOCAL_IP= will be converted to IPADDR by netconf REMOTE_IP= will be converted to GATEWAY by netconf Wireless-specific items: See iw(8) for additional information. MODE=[Managed|Ad-Hoc|Monitor] ESSID= Required. FREQ= Required if MODE=Ad-Hoc. KEY=<default WEP key> IPSEC specific items SRC=source address. Not required. DST=destination address TYPE=IPSEC SRCNET=source net (for tunneling) DSTNET=destination network (for tunneling) Manual keying: AH_PROTO{,_IN,_OUT}=protocol to use for AH (defaults to hmac-sha1) ESP_PROTO{,_IN,_OUT}=protocol to use for ESP (defaults to 3des-cbc) AESP_PROTO{,_IN,_OUT}=protocol to use for ESP authentication (defaults to hmac-sha1) KEY_AH{,_IN,_OUT}=AH key KEY_ESP{,_IN,_OUT}=ESP encryption key KEY_AESP{,_IN,_OUT}=ESP authentication key (optional) SPI_{ESP,AH}_{IN,OUT}=SPIs to use _IN and _OUT specifiers are for using different keys or protocols for incoming and outgoing packets. If neither _IN or _OUT variants are set for protocols or keys, the same will be used for both. Hexadecimal keys need to be prefixed with "0x". Automatic keying: IKE_DHGROUP=<number> (defaults to 2) IKE_METHOD=PSK|X509|GSSAPI PSK=preshared keys (shared secret) X509=X.509 certificates GSSPI=GSSAPI authentication IKE_AUTH=protocol to use for Phase 1 of SA (defaults to sha1) IKE_ENC=protocol to use for Phase 1 of SA (defaults to 3des) IKE_PSK=preshared key for this connection IKE_CERTFILE=our certificate file name for X509 IKE IKE_PEER_CERTFILE=peer public cert filename for X509 IKE IKE_DNSSEC=retrieve peer public certs from DNS (otherwise uses certificate information sent over IKE) To manage the racoon configuration manually (e.g. when there is more than one IPSEC configuration with the same DST), set KEYING=automatic and leave all IKE_* parameters unspecified. To override the identifier to use with a preshared key: MYID_TYPE=address|fqdn|user_fqdn MYID_VALUE=fqdn or user_fqdn string for this connection Usage of AH or ESP may be disabled by setting {AH,ESP}_PROTO to "none". Bonding-specific items SLAVE=yes Specifies device as a slave MASTER=bondXX Specifies master device to bind to BONDING_OPTS= A space-separated list of options to the bonding driver for this interface, such as: "mode=active-backup arp_interval=60 arp_ip_target=192.168.1.1,192.168.1.2" Tunnel-specific items: TYPE=GRE|GRE6|IPIP|IPIP6|EXTERNAL External is a mode for ip6_tunnel interfaces (that cannot be set on the primary ip6tnl0 interface), which permits unwrapping encapsulated packets regardless of their internal IP (v4 or v6) provided the inner address is on the interface. Use $MY_INNER_IPADDR for v4 addresses. Use $IPV6ADDR and $IPV6ADDR_SECONDARIES as usual for v6 addresses. MY_INNER_IPADDR=local IP address of the tunnel interface PEER_OUTER_IPADDR=IP address of the remote tunnel endpoint MY_OUTER_IPADDR=IP address of the local tunnel endpoint If unspecified, an IP address is selected automatically for outgoing tunnel packets, and incoming tunnel packets are accepted on all local IP addresses. PEER_INNER_IPADDR=IP address of the remote end of the tunnel interface If this is specified, a route to PEER_INNER_IPADDR through the tunnel is added automatically. TTL=TTL value for tunnel packets Default is to use the TTL of the packet transported through the tunnel Bridge-specific items: TYPE=Bridge STP=off|on (see 'brctl stp') DELAY=forward delay time in seconds (see 'brctl setfd') BRIDGING_OPTS= A space-separated list of bridging options for either the bridge device, or the port device, such as: BRIDGING_OPTS="hello_time=200 priority=65535" for bridge devices, or BRIDGING_OPTS="hairpin_mode=1" for port devices. TUN/TAP-specific items: OWNER=<owner of the device> /etc/sysconfig/network-scripts/chat-<interface-name>: chat script for PPP or SLIP connection intended to establish the connection. For SLIP devices, a DIP script is written from the chat script; for PPP devices, the chat script is used directly. /etc/sysconfig/network-scripts/dip-<interface-name> A write-only script created from the chat script by netcfg. Do not modify this. In the future, this file may disappear by default and created on-the-fly from the chat script if it does not exist. /etc/sysconfig/network-scripts/ifup-post Called when any network device EXCEPT a SLIP device comes up. Calls /etc/sysconfig/network-scripts/ifup-routes to bring up static routes that depend on that device. Calls /etc/sysconfig/network-scripts/ifup-aliases to bring up aliases for that device. Sets the hostname if it is not already set and a hostname can be found for the IP for that device. Sends SIGIO to any programs that have requested notification of network events. Could be extended to fix up nameservice configuration, call arbitrary scripts, etc, as needed. /etc/sysconfig/network-scripts/ifup-routes Set up static routes for a device. /etc/sysconfig/network-scripts/ifup-aliases Bring up aliases for a device. /etc/sysconfig/network-scripts/route-<interface-name> Contains lines that specify additional routes that should be added when the associated interface is brought up. The files are processed by the ifup-routes script and uses the /sbin/ipcalc utility for all network masks and numbers. Routes are specified using the syntax: ADDRESSn=<network> NETMASKn=<network/prefix mask> GATEWAYn=<next-hop router/gateway IP address> The "n" is expected to be consecutive positive integers starting from 0. For example: ADDRESS0=192.168.2.0 NETMASK0=255.255.255.0 GATEWAY0=192.168.1.1 adds a network route to the 192.168.2.0 network via the gateway at 192.168.1.1. Since you must already have a route to the network of the gateway, there is no need to specify a device. Note: The ifup-routes script also supports an older syntax designed to be used directly as an argument to "/sbin/ip route add". If no "ADDRESSn" lines are found the following will still work: 192.168.2.0/24 dev ppp0 adds a network route to the 192.168.2.0 network through ppp0. /etc/sysconfig/network-scripts/route6-<interface-name> Contains lines that are arguments to "/sbin/ip -6 route add" For example: site-local route for network fec0:0:0:2::/64 via gateway fec0:0:0:1:0:0:0:20 (e.g. on eth0): fec0:0:0:2::/64 via fec0:0:0:1:0:0:0:20 additional prefix configured to be on-link on eth0: 3ffe:fffe:1:2::/64 dev eth0 6to4 route for network 3ffe:ffff:1::/48, either: 3ffe:ffff:1::/48 3ffe:ffff:1::/48 via ::192.168.1.2 Note the special case of 6to4 interface: 'via [relay]' is automatically added if explicit 'via' wasn't specified. /etc/sysconfig/network-scripts/rule-<interface-name> /etc/sysconfig/network-scripts/rule6-<interface-name> Contains lines that specify additional routing rules that should be added when the associated interface is brought up. Each non-comment line is used directly as an argument to "/sbin/ip rule add" or "/sbin/ip -6 rule add" for rule6 files.
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