path: root/doc/net.example.Linux.in

##############################################################################
# QUICK-START
#
# The quickest start is if you want to use DHCP.
# In that case, everything should work out of the box, no configuration
# necessary, though the startup script will warn you that you haven't
# specified anything.

# WARNING :- some examples have a mixture of IPv4 (ie 192.168.0.1) and IPv6
# (ie 4321:0:1:2:3:4:567:89ab) internet addresses. They only work if you have
# the relevant kernel option enabled. So if you don't have an IPv6 enabled
# kernel then remove the IPv6 address from your config.

# If you want to use a static address or use DHCP explicitly, jump
# down to the section labelled INTERFACE HANDLERS.
#
# If you want to do anything more fancy, you should take the time to
# read through the rest of this file.


##############################################################################
# MODULES
#
# We now support modular networking scripts which means we can easily
# add support for new interface types and modules while keeping
# compatability with existing ones.
# 
# Modules load by default if the package they need is installed.  If
# you specify a module here that doesn't have it's package installed
# then you get an error stating which package you need to install.
# Ideally, you only use the modules setting when you have two or more
# packages installed that supply the same service.
#
# In other words, you probably should DO NOTHING HERE...

# Prefer ifconfig over iproute2
#modules="ifconfig"

# You can also specify other modules for an interface
# In this case we prefer udhcpc over dhcpcd
#modules_eth0="udhcpc"

# You can also specify which modules not to use - for example you may be
# using a supplicant or linux-wlan-ng to control wireless configuration but
# you still want to configure network settings per SSID associated with.
#modules="!iwconfig !wpa_supplicant"
# IMPORTANT: If you need the above, please disable modules in that order


##############################################################################
# INTERFACE HANDLERS
# 
# We provide two interface handlers presently: ifconfig and iproute2.
# You need one of these to do any kind of network configuration.
# For ifconfig support, emerge sys-apps/net-tools
# For iproute2 support, emerge sys-apps/iproute2

# If you don't specify an interface then we prefer iproute2 if it's installed
# To prefer ifconfig over iproute2
#modules="ifconfig"

# For a static configuration, use something like this
# (They all do exactly the same thing btw)
#config_eth0="192.168.0.2/24"
#config_eth0="192.168.0.2 netmask 255.255.255.0"

# If you need more than one address, you can use something like this
# NOTE: ifconfig creates an aliased device for each extra IPv4 address
#       (eth0:1, eth0:2, etc)
#       iproute2 does not do this as there is no need to
#config_eth0="192.168.0.2/24 192.168.0.3/24 192.168.0.4/24"
# However, that only works with CIDR addresses, so you can't use netmask.
# Or you can use sequence expressions
#config_eth0="192.168.0.{2..4}/24"
# which does the same as above. Be careful though as if you use this and
# fallbacks, you have to ensure that both end up with the same number of
# values otherwise your fallback won't work correctly.

# You can also use IPv6 addresses
# (you should always specify a prefix length with IPv6 here)
#config_eth0="192.168.0.2/24 4321:0:1:2:3:4:567:89ab/64 4321:0:1:2:3:4:567:89ac/64"

# If you wish to keep existing addresses + routing and the interface is up,
# you can specify a noop (no operation). If the interface is down or there
# are no addresses assigned, then we move onto the next step (default dhcp)
# This is useful when configuring your interface with a kernel command line
# or similar
#config_eth0="noop 192.168.0.2/24"

# If you don't want ANY address (only useful when calling for advanced stuff)
#config_eth0="null"

# Here's how to do routing if you need it
# We add an IPv4 default route, IPv4 subnet route and an IPv6 unicast route
#routes_eth0="default via 192.168.0.1
#10.0.0.0/8 via 192.168.0.1
#::/0"

# If a specified module fails (like dhcp - see below), you can specify a
# fallback like so
#fallback_eth0="192.168.0.2/24"
#fallback_route_eth0="default via 192.168.0.1"

# NOTE: fallback entry must match the entry location in config_eth0
# As such you can only have one fallback route.

# Some users may need to alter the MTU - here's how
#mtu_eth0="1500"
# Same for TX Queue Length
#txqueuelen_eth0="1000"

# Each module described below can set a default base metric, lower is
# preferred over higher. This is so we can prefer a wired route over a
# wireless route automaticaly. You can override this by setting
#metric_eth0="100"
# or on a global basis
#metric="100"
# The only downside of the global setting is that you have to ensure that
# there are no conflicting routes yourself. For users with large routing
# tables you may have to set a global metric as the due to a simple read of
# the routing table taking over a minute at a time.

# You may wish to disable the interface being brought down when stopping.
# This is only of use for WakeOnLan.
#ifdown_eth0="NO"

##############################################################################
# OPTIONAL MODULES

#-----------------------------------------------------------------------------
# WIRELESS (802.11 support)
# Wireless can be provided by iwconfig or wpa_supplicant
# wpa_supplicant is preferred, use the modules directive to prefer iwconfig.
#modules="iwconfig"
#
# iwconfig
# emerge net-wireless/wireless-tools
###############################################
# HINTS
#
# Most users will just need to set the following options
# key_SSID1="s:yourkeyhere enc open" # s: means a text key
# key_SSID2="aaaa-bbbb-cccc-dd"      # no s: means a hex key
# preferred_aps="'SSID 1' 'SSID 2'"
#
# Clear? Good. Now configure your wireless network below

###############################################
# SETTINGS
# Hard code an SSID to an interface - leave this unset if you wish the driver
# to scan for available Access Points
# Set to "any" to connect to any SSID - the driver picks an Access Point
# This needs to be done when the driver doesn't support scanning
# This may work for drivers that don't support scanning but you need automatic
# AP association
# I would only set this as a last resort really - use the preferred_aps
# setting at the bottom of this file

# However, using ad-hoc (without scanning for APs) and master mode
# do require the SSID to be set - do this here
#essid_eth0="any"

# Set the mode of the interface (managed, ad-hoc, master or auto)
# The default is auto
# If it's ad-hoc or master you also may need to specify the channel below
#mode_eth0="auto"

# If managed mode fails, drop to ad-hoc mode with the below SSID?
#adhoc_essid_eth0="WLAN"

# Some drivers/hardware don't scan all that well. We have no control over this
# but we can say how many scans we want to do to try and get a better sweep of
# the area. The default is 1.
#scans_eth0="1"

#Channel can be set (1-14), but defaults to 3 if not set.
#
# The below is taken verbatim from the BSD wavelan documentation found at
# http://www.netbsd.org/Documentation/network/wavelan.html
# There are 14 channels possible; We are told that channels 1-11 are legal for
# North America, channels 1-13 for most of Europe, channels 10-13 for France,
# and only channel 14 for Japan. If in doubt, please refer to the documentation
# that came with your card or access point. Make sure that the channel you
# select is the same channel your access point (or the other card in an ad-hoc
# network) is on. The default for cards sold in North America and most of Europe
# is 3; the default for cards sold in France is 11, and the default for cards
# sold in Japan is 14.
#channel_eth0="3"

# Setup any other config commands. This is basically the iwconfig argument
# without the iwconfig $iface.
#iwconfig_eth0=""

# Set private driver ioctls. This is basically the iwpriv argument without
# the iwpriv $iface. If you use the rt2500 driver (not the rt2x00 one) then
# you can set WPA here, below is an example.
#iwpriv_eth0=""
#iwpriv_SSID="set AuthMode=WPAPSK
#set EncrypType=TKIP
#set WPAPSK=yourpasskey"
#NOTE: Even though you can use WPA like so, you may have to set a WEP key
#if your driver claims the AP is encrypted. The WEP key itself will not be
#used though.

# Seconds to wait before scanning
# Some drivers need to wait until they have finished "loading"
# before they can scan - otherwise they error and claim that they cannot scan
# or resource is unavailable. The default is to wait zero seconds
#sleep_scan_eth0="1"

# Seconds to wait until associated. The default is to wait 10 seconds.
# 0 means wait indefinitely. WARNING: this can cause an infinite delay when
# booting.
#associate_timeout_eth0="5"

# By default a successful association in Managed mode sets the MAC
# address of the AP connected to. However, some drivers (namely
# the ipw2100) don't set an invalid MAC address when association
# fails - so we need to check on link quality which some drivers
# don't report properly either.
# So if you have connection problems try flipping this setting
# Valid options are MAC, quality and all - defaults to MAC
#associate_test_eth0="MAC"

# Some driver/card combinations need to scan in Ad-Hoc mode
# After scanning, the mode is reset to the one defined above
#scan_mode_eth0="Ad-Hoc"

# Below you can define private ioctls to run before and after scanning
# Format is the same as the iwpriv_eth0 above
# This is needed for the HostAP drivers
#iwpriv_scan_pre_eth0="'host_roaming 2'"
#iwpriv_scan_post_eth0="'host_roaming 0'"

# Define a WEP key per SSID or MAC address (of the AP, not your card)
# The encryption type (open or restricted) must match the
# encryption type on the Access Point
# You can't use "any" for an SSID here
#key_SSID="1234-1234-1234-1234-1234-1234-56"
# or you can use strings. Passphrase IS NOT supported
# To use a string, prefix it with s:
# Note - this example also sets the encryption method to open
# which is regarded as more secure than restricted
#key_SSID="s:foobar enc open"
#key_SSID="s:foobar enc restricted"

# If you have whitespace in your key, here's how to set it and use other
# commands like using open encryption.
#key_SSID="s:'foo bar' enc open"

# WEP key for the AP with MAC address 001122334455
#mac_key_001122334455="s:foobar"

# Here are some more examples of keys as some users find others work
# and some don't where they should all do the same thing
#key_SSID="open s:foobar"
#key_SSID="open 1234-5678-9012"
#key_SSID="s:foobar enc open"
#key_SSID="1234-5678-9012 enc open"

# You may want to set muliple keys - here's an example
# It sets 4 keys on the card and instructs to use key 2 by default
#key_SSID="[1] s:passkey1 key [2] s:passkey2 key [3] s:passkey3 key [4] s:passkey4 key [2]"

# You can also override the interface settings found in /etc/conf.d/net
# per SSID - which is very handy if you use different networks a lot
#config_SSID="dhcp"
#dhcpcd_SSID="-t 5"
#routes_SSID=
#fallback_SSID=

# Setting name/domain server causes /etc/resolv.conf to be overwritten
# Note that if DHCP is used, and you want this to take precedence then
# please put -R in your dhcpcd options
#dns_servers_SSID="192.168.0.1 192.168.0.2"
#dns_domain_SSID="some.domain"
#dns_search_SSID="search.this.domain search.that.domain"
# Please check the man page for resolv.conf for more information
# as domain and search (searchdomains) are mutually exclusive and
# searchdomains takes precedence

# You can also set any of the /etc/conf.d/net variables per MAC address
# incase you use Access Points with the same SSID but need different
# networking configs. Below is an example - of course you use the same
# method with other variables
#config_001122334455="dhcp"
#dhcpcd_001122334455="-t 10"
#dns_servers_001122334455="192.168.0.1 192.168.0.2"

# Map a MAC address to an SSID
# This is used when the Access Point is not broadcasting it's SSID
# WARNING: This will override the SSID being broadcast due to some
# Access Points sending an SSID even when they have been configured
# not to!
# Change 001122334455 to the MAC address and SSID to the SSID
# it should map to
#mac_essid_001122334455="SSID"

# This lists the preferred SSIDs to connect to in order
# SSID's can contain any characters here as they must match the broadcast
# SSID exactly.
# Surround each SSID with the " character and seperate them with a space
# If the first SSID isn't found then it moves onto the next
# If this isn't defined then it connects to the first one found
#preferred_aps="SSID1 SSID2" 

# You can also define a preferred_aps list per interface
#preferred_aps_eth0="SSID3 SSID4"

# You can also say whether we only connect to preferred APs or not
# Values are "any", "preferredonly", "forcepreferred", "forcepreferredonly" and "forceany"
# "any" means it will connect to visible APs in the preferred list and then any
# other available AP
# "preferredonly" means it will only connect to visible APs in the preferred list
# "forcepreferred" means it will forceably connect to APs in order if it does not find
# them in a scan
# "forcepreferredonly" means it forceably connects to the APs in order and does not bother
# to scan
# "forceany" does the same as forcepreferred + connects to any other available AP
# Default is "any"
#associate_order="any"
#associate_order_eth0="any"

# You can define blacklisted Access Points in the same way
#blacklist_aps="SSID1 SSID2"
#blacklist_aps_eth0="SSID3 SSID4"

# If you have more than one wireless card, you can say if you want
# to allow each card to associate with the same Access Point or not
# Values are "yes" and "no"
# Default is "yes"
#unique_ap="yes"
#unique_ap_eth0="yes"

# IMPORTANT: preferred_only, blacklisted_aps and unique_ap only work when
# essid_eth0 is not set and your card is capable of scanning

# NOTE: preferred_aps  list ignores blacklisted_aps - so if you have
# the same SSID in both, well, you're a bit silly :p


############################################################
# wpa_supplicant
# emerge net-wireless/wpa-supplicant
# Wireless options are held in /etc/wpa_supplicant/wpa_supplicant.conf
# Console the wpa_supplicant.conf.example that is installed in
# /usr/share/doc/wpa_supplicant
# To configure wpa_supplicant
#wpa_supplicant_ath0="-Dmadwifi" # For Atheros based cards
# Consult wpa_supplicant for more drivers - the default is -Dwext which should
# work for most cards.

# By default we don't wait for wpa_suppliant to associate and authenticate.
# If you need to change this behaviour then you don't know how our scripts work
# and setting this value could cause strange things to happen.
# If you would like to, so can specify how long in seconds.
#associate_timeout_eth0=60
# A value of 0 means wait forever.

# You can also override any settings found here per SSID - which is very
# handy if you use different networks a lot. See below for using the SSID
# in our variables
#config_SSID="dhcp"
# See the System module below for setting dns/nis/ntp per SSID

# You can also override any settings found here per MAC address of the AP
# in case you use Access Points with the same SSID but need different
# networking configs. Below is an example - of course you use the same
# method with other variables
#mac_config_001122334455="dhcp"
#mac_dns_servers_001122334455="192.168.0.1 192.168.0.2"

# When an interface has been associated with an Access Point, a global
# variable called SSID is set to the Access Point's SSID for use in the
# pre/post user functions below (although it's not available in preup as you
# won't have associated then)

# If you're using anything else to configure wireless on your interface AND
# you have installed wpa_supplicant, you need to disable wpa_supplicant 
#modules="!iwconfig !wpa_supplicant"
#or
#modules="!wireless"

##############################################################################
# WIRELESS SSID IN VARIABLES 
##############################################################################
# Remember to change SSID to your SSID.
# Say that your SSID is My NET - the line
#      #key_SSID="s:passkey"
# becomes
#      #key_My_NET="s:passkey"
# Notice that the space has changed to an underscore - do the same with all
# characters not in a-z A-Z (English alphabet) 0-9. This only applies to
# variables and not values.
#
# Any SSID's in values like essid_eth0="My NET" may need to be escaped
# This means placing the character \ before the character
# \" need to be escaped for example
# So if your SSID is
#      My "\ NET
# it becomes
#      My \"\\ NET
# for example
#      #essid_eth0="My\"\\NET"
#
# So using the above we can use
#      #dns_domain_My____NET="My\"\\NET"
# which is an invalid dns domain, but shows the how to use the variable
# structure
#########################################################


#-----------------------------------------------------------------------------
# DHCP
# DHCP can be provided by dhclient, dhcpcd, pump or udhcpc.
#
# dhclient: emerge net-misc/dhcp
# dhcpcd:   emerge net-misc/dhcpcd
# pump:     emerge net-misc/pump
# udhcpc:   emerge net-misc/udhcp

# If you have more than one DHCP client installed, you need to specify which
# one to use - otherwise we default to dhcpcd if available.
#modules="dhclient" # to select dhclient over dhcpcd
#
# Notes:
# - All clients send the current hostname to the DHCP server by default
# - dhcpcd does not daemonize when the lease time is infinite
# - udhcp-0.9.3-r3 and earlier do not support getting NTP servers 
# - pump does not support getting NIS servers
# - DHCP tends to erase any existing device information - so add
#   static addresses after dhcp if you need them
# - dhclient and udhcpc can set other resolv.conf options such as "option"
#   and "sortlist"- see the System module for more details

# Regardless of which DHCP client you prefer, you configure them the
# same way using one of following depending on which interface modules
# you're using.
#config_eth0="dhcp"

# For passing custom options to dhcpcd use something like the following.  This
# example reduces the timeout for retrieving an address from 60 seconds (the
# default) to 10 seconds.
#dhcpcd_eth0="-t 10"

# dhclient, udhcpc and pump don't have many runtime options
# You can pass options to them in a similar manner to dhcpcd though
#dhclient_eth0="..."
#udhcpc_eth0="..."
#pump_eth0="..."

# GENERIC DHCP OPTIONS
# Set generic DHCP options like so
#dhcp_eth0="release nodns nontp nonis nogateway nosendhost"

# This tells the dhcp client to release it's lease when it stops, not to
# overwrite dns, ntp and nis settings, not to set a default route and not to
# send the current hostname to the dhcp server and when it starts.
# You can use any combination of the above options - the default is not to
# use any of them.

#-----------------------------------------------------------------------------
# For APIPA support, emerge net-misc/iputils or net-analyzer/arping

# APIPA is a module that tries to find a free address in the range
# 169.254.0.0-169.254.255.255 by arping a random address in that range on the
# interface. If no reply is found then we assign that address to the interface

# This is only useful for LANs where there is no DHCP server and you don't
# connect directly to the internet.
#config_eth0="dhcp"
#fallback_eth0="apipa"

#-----------------------------------------------------------------------------
# ARPING Gateway configuration 
# and
# Automatic Private IP Addressing (APIPA)
# For arpingnet / apipa support, emerge net-misc/iputils or net-analyzer/arping
#
# This is a module that tries to find a gateway IP. If it exists then we use
# that gateways configuration for our own. For the configuration variables
# simply ensure that each octet is zero padded and the dots are removed.
# Below is an example.
#
#gateways_eth0="192.168.0.1 10.0.0.1"
#config_192168000001="192.168.0.2/24"
#routes_192168000001="default via 192.168.0.1"
#dns_servers_192168000001="192.168.0.1"
#config_010000000001="10.0.0.254/8"
#routes_010000000001="default via 10.0.0.1"
#dns_servers_010000000001="10.0.0.1"

# We can also specify a specific MAC address for each gateway if different
# networks have the same gateway.
#gateways_eth0="192.168.0.1,00:11:22:AA:BB:CC 10.0.0.1,33:44:55:DD:EE:FF"
#config_192168000001_001122AABBCC="192.168.0.2/24"
#routes_192168000001_001122AABBCC="default via 192.168.0.1"
#dns_servers_192168000001_001122AABBCC="192.168.0.1"
#config_010000000001_334455DDEEFF="10.0.0.254/8"
#routes_010000000001_334455DDEEFF="default via 10.0.0.1"
#dns_servers_010000000001_334455DDEEFF="10.0.0.1"

# If you need to spoof the source address, you can add that as third parameter
# like so
#gateways_eth0="192.168.0.1,00:11:22:AA:BB:CC,192.168.0.50"
#or
#gateways_eth0="192.168.0.1,,192.168.0.50"
# This requires arping to be installed though

# If we don't find any gateways (or there are none configured) then we try and
# use APIPA to find a free address in the range 169.254.0.0-169.254.255.255
# by arping a random address in that range on the interface. If no reply is
# found then we assign that address to the interface.

# This is only useful for LANs where there is no DHCP server.
#config_eth0="arping"

# or if no DHCP server can be found
#config_eth0="dhcp"
#fallback_eth0="arping"

# NOTE: We default to sleeping for 1 second the first time we attempt an
# arping to give the interface time to settle on the LAN. This appears to
# be a good default for most instances, but if not you can alter it here.
#arping_sleep=5
#arping_sleep_lan=7

# NOTE: We default to waiting 3 seconds to get an arping response. You can
# change the default wait like so.
#arping_wait=3
#arping_wait_lan=2

#-----------------------------------------------------------------------------
# VLAN (802.1q support)
# For VLAN support, emerge net-misc/vconfig

# Specify the VLAN numbers for the interface like so
# Please ensure your VLAN IDs are NOT zero-padded
#vlans_eth0="1 2"

# You may not want to assign an IP the the physical interface, but we still
# need it up.
#config_eth0="null"

# You can also configure the VLAN - see for vconfig man page for more details
#vconfig_eth0="set_name_type VLAN_PLUS_VID_NO_PAD"
#vconfig_vlan1="set_flag 1
#set_egress_map 2 6"
#config_vlan1="172.16.3.1/23"
#config_vlan2="172.16.2.1/23"

# NOTE: Vlans can be configured with a . in their interface names
# When configuring vlans with this name type, you need to replace . with a _
#config_eth0.1="dhcp" - does not work
#config_eth0_1="dhcp" - does work

# NOTE: Vlans are controlled by their physical interface and not per vlan
# This means you do not need to create init scripts in /etc/init.d for each
# vlan, you must need to create one for the physical interface.
# If you wish to control the configuration of each vlan through a separate
# script, or wish to rename the vlan interface to something that vconfig
# cannot then you need to do this.
#vlan_start_eth0="no"

# If you do the above then you may want to depend on eth0 like so
# rc_need_vlan1="net.eth0"
# NOTE: depend functions only work in /etc/conf.d/net
# and not in profile configs such as /etc/conf.d/net.foo

#-----------------------------------------------------------------------------
# Bonding
# For link bonding/trunking on 2.4 kernels, or kernels without sysfs
# emerge net-misc/ifenslave

# To bond interfaces together
#slaves_bond0="eth0 eth1 eth2"
#config_bond0="null" # You may not want to assign an IP the the bond

# You can also configure the bond here, which must be done via sysfs on 2.6
# kernels or newer. See the kernel bonding documention for a description of
# these options.
#arp_ip_target_bond0="+26.0.0.0"

# If any of the slaves require extra configuration - for example wireless or
# ppp devices - we need to depend function on the bonded interfaces
#rc_need_bond0="net.eth0 net.eth1"


#-----------------------------------------------------------------------------
# Classical IP over ATM 
# For CLIP support emerge net-dialup/linux-atm

# Ensure that you have /etc/atmsigd.conf setup correctly
# Now setup each clip interface like so
#clip_atm0="peer_ip [if.]vpi.vci [opts],"
#  where "peer_ip" is the IP address of a PVC peer (in case of an ATM connection
#  with your ISP, your only peer is usually the ISP gateway closest to you),
#  "if" is the number of the ATM interface which will carry the PVC, "vpi.vci"
#  is the ATM VC address, and "opts" may optionally specify VC parameters like
#  qos, pcr, and the like (see "atmarp -s" for further reference). Please also
#  note quoting: it is meant to distinguish the VCs you want to create. You may,
#  in example, create an atm0 interface to more peers, like this:
#clip_atm0="1.1.1.254,0.8.35 1.1.1.253,1.8.35"

#  By default, the PVC will use the LLC/SNAP encapsulation. If you rather need a
#  null encapsulation (aka "VC mode"), please add the keyword "null" to opts.


#-----------------------------------------------------------------------------
# PPP
# For PPP support, emerge net-dialup/ppp
# PPP is used for most dialup connections, including ADSL.
# The older ADSL module is documented below, but you are encouraged to try
# this module first.
#
# You need to create the PPP net script yourself. Make it like so
#ln -s net.lo /etc/init.d/net.ppp0
#
# Each PPP interface requires an interface to use as a "Link"
#link_ppp0="/dev/ttyS0" 		# Most PPP links will use a serial port
#link_ppp0="eth0"       		# PPPoE requires an ethernet interface
#link_ppp0="[itf.]vpi.vci"		# PPPoA requires the ATM VC's address
#link_ppp0="/dev/null"			# ISDN links should have this
#link_ppp0="pty 'your_link_command'"	# PPP links over ssh, rsh, etc
#
# Here you should specify what pppd plugins you want to use
# Available plugins are: pppoe, pppoa, capi, dhcpc, minconn, radius,
#			 radattr, radrealms and winbind 
#plugins_ppp0="pppoe"			# Required plugin for PPPoE
#plugins_ppp0="pppoa vc-encaps"		# Required plugin for PPPoA with an option
#plugins_ppp0="capi"			# Required plugin for ISDN
#
# PPP requires at least a username. You can optionally set a password here too
# If you don't, then it will use the password specified in /etc/ppp/*-secrets
# against the specified username
#username_ppp0='user'
#password_ppp0='password'
# NOTE: You can set a blank password like so
#password_ppp0=
#
# The PPP daemon has many options you can specify - although there are many
# and may seem daunting, it is recommended that you read the pppd man page
# before enabling any of them
#pppd_ppp0="
#	maxfail 0	# WARNING: It's not recommended you use this
#			# if you don't specify maxfail then we assume 0
#	updetach 	# If not set, "/etc/init.d/net.ppp0 start" will return
#			# immediately,  without waiting the link to come up
#			# for the first time.
#			# Do not use it for dial-on-demand links!
#	debug 	# Enables syslog debugging
#	noauth	# Do not require the peer to authenticate itself
#	defaultroute	# Make this PPP interface the default route
#	usepeerdns		# Use the DNS settings provided by PPP
#
# On demand options
#	demand		# Enable dial on demand
#	idle 30		# Link goes down after 30 seconds of inactivity
#	10.112.112.112:10.112.112.113	# Phony IP addresses
#	ipcp-accept-remote	# Accept the peers idea of remote address
#	ipcp-accept-local	# Accept the peers idea of local address
#	holdoff 3 	# Wait 3 seconds after link dies before re-starting
#
# Dead peer detection
#	lcp-echo-interval 15	# Send a LCP echo every 15 seconds
#	lcp-echo-failure 3	# Make peer dead after 3 consective
#				# echo-requests
#	
# Compression options - use these to completely disable compression
#	noaccomp noccp nobsdcomp nodeflate nopcomp novj novjccomp
#
# Dial-up settings
#	lock				# Lock serial port
#	115200			# Set the serial port baud rate
#	modem crtscts			# Enable hardware flow control
#	192.168.0.1:192.168.0.2	# Local and remote IP addresses
#"
#
# Dial-up PPP users need to specify at least one telephone number
#phone_number_ppp0="12345689" # Maximum 2 phone numbers are supported
# They will also need a chat script - here's a good one
#chat_ppp0="
#ABORT BUSY
#ABORT ERROR
#ABORT 'NO ANSWER'
#ABORT 'NO CARRIER'
#ABORT 'NO DIALTONE'
#ABORT 'Invalid Login'
#ABORT 'Login incorrect'
#TIMEOUT 5
#'' ATZ
#OK AT # Put your modem initialization string here
#OK 'ATDT\T'
#TIMEOUT 60
#CONNECT ''
#TIMEOUT 5
#~-- ''
#"

# If the link require extra configuration - for example wireless or
# RFC 268 bridge - we need to depend on the bridge so they get
# configured correctly.
#rc_need_ppp0="net.nas0"

#WARNING: if MTU of the PPP interface is less than 1500 and you use this
#machine as a router, you should add the following rule to your firewall
#
#iptables -I FORWARD 1 -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu

#-----------------------------------------------------------------------------
# ADSL
# For ADSL support, emerge net-dialup/rp-pppoe
# WARNING: This ADSL module is being deprecated in favour of the PPP module
# above.
# You should make the following settings and also put your
# username/password information in /etc/ppp/pap-secrets

# Configure the interface to use ADSL
#config_eth0="adsl"

# You probably won't need to edit /etc/ppp/pppoe.conf if you set this
#adsl_user_eth0="my-adsl-username"

#-----------------------------------------------------------------------------
# ISDN
# For ISDN support, emerge net-dialup/isdn4k-utils
# You should make the following settings and also put your
# username/password information in /etc/ppp/pap-secrets

# Configure the interface to use ISDN
#config_ippp0="dhcp"
# It's important to specify dhcp if you need it!
#config_ippp0="192.168.0.1/24"
# Otherwise, you can use a static IP

# NOTE: The interface name must be either ippp or isdn followed by a number

# You may need this option to set the default route
#ipppd_eth0="defaultroute"

#-----------------------------------------------------------------------------
# MAC changer
# To set a specific MAC address
#mac_eth0="00:11:22:33:44:55"

# For changing MAC addresses using the below, emerge net-analyzer/macchanger
# - to randomize the last 3 bytes only
#mac_eth0="random-ending"
# - to randomize between the same physical type of connection (e.g. fibre,
# copper, wireless) , all vendors
#mac_eth0="random-samekind"
# - to randomize between any physical type of connection (e.g. fibre, copper,
# wireless) , all vendors
#mac_eth0="random-anykind"
# - full randomization - WARNING: some MAC addresses generated by this may NOT
# act as expected
#mac_eth0="random-full"
# custom - passes all parameters directly to net-analyzer/macchanger
#mac_eth0="some custom set of parameters"

# You can also set other options based on the MAC address of your network card
# Handy if you use different docking stations with laptops
#config_001122334455="dhcp"

#-----------------------------------------------------------------------------
# TUN/TAP
# For TUN/TAP support emerge net-misc/openvpn or sys-apps/usermode-utilities
#
# You must specify if we're a tun or tap device. Then you can give it any
# name you like - such as vpn
#tuntap_vpn="tun"
#config_vpn="192.168.0.1/24"

# Or stick wit the generic names - like tap0
#tuntap_tap0="tap"
#config_tap0="192.168.0.1/24"

# For passing custom options to tunctl use something like the following.  This
# example sets the owner to adm
#tunctl_tun1="-u adm"
# OpenVPN-2.1_rc6 and newer allow --user and --group to set owner and group
# of the node as well
#openvpn_tun1="--user foo --group bar"

#-----------------------------------------------------------------------------
# Bridging (802.1d)
# For bridging support emerge net-misc/bridge-utils

# To add ports to bridge br0
#bridge_br0="eth0 eth1"
# or dynamically add them when the interface comes up
#bridge_add_eth0="br0"
#bridge_add_eth1="br0"

# You need to configure the ports to null values so dhcp does not get started 
#config_eth0="null"
#config_eth1="null"

# Finally give the bridge an address - dhcp or a static IP
#config_br0="dhcp" # may not work when adding ports dynamically
#config_br0="192.168.0.1/24"

# If any of the ports require extra configuration - for example wireless or
# ppp devices - we need to depend on them like so.
#rc_need_br0="net.eth0 net.eth1"

# Below is an example of configuring the bridge
# Consult "man brctl" for more details
#brctl_br0="setfd 0
#sethello 0
#stp off"

#-----------------------------------------------------------------------------
# RFC 2684 Bridge Support 
# For RFC 2684 bridge support emerge net-misc/br2684ctl

# Interface names have to be of the form nas0, nas1, nas2, etc.
# You have to specify a VPI and VCI for the interface like so
#br2684ctl_nas0="-a 0.38" # UK VPI and VCI

# You may want to configure the encapsulation method as well by adding the -e
# option to the command above (may need to be before the -a command)
# -e 0 # LLC (default)
# -e 1 # VC mux

# Then you can configure the interface as normal
#config_nas0="'192.168.0.1/24'"

#-----------------------------------------------------------------------------
# Tunnelling
# WARNING: For tunnelling it is highly recommended that you
# emerge sys-apps/iproute2
#
# For GRE tunnels
#iptunnel_vpn0="mode gre remote 207.170.82.1 key 0xffffffff ttl 255"

# For IPIP tunnels
#iptunnel_vpn0="mode ipip remote 207.170.82.2 ttl 255"

# To configure the interface
#config_vpn0="192.168.0.2 pointopoint 192.168.1.2"	# ifconfig style
#config_vpn0="192.168.0.2 peer 192.168.1.1"		# iproute2 style

# 6to4 Tunnels allow IPv6 to work over IPv4 addresses, provided you
# have a non-private address configured on an interface.
# link_6to4="eth0"		# Interface to base it's addresses on
# config_6to4="ip6to4"
# You may want to depend on eth0 like so
#rc_need_6to4="net.eth0"
# To ensure that eth0 is configured before 6to4. Of course, the tunnel could be
# any name and this also works for any configured interface.
# NOTE: If you're not using iproute2 then your 6to4 tunnel has to be called
# sit0 - otherwise use a different name like 6to4 in the example above.

# You can also specify a relay and suffix if you like.
# The default relay is 192.88.99.1 and the defualt suffix is :1
#relay_6to4="192.168.3.2"
#suffix_6to4=":ff"


#-----------------------------------------------------------------------------
# System
# For configuring system specifics such as domain, dns, ntp and nis servers
# It's rare that you would need todo this, but you can anyway.
# This is most benefit to wireless users who don't use DHCP so they can change
# their configs based on SSID.

# If you omit the _eth0 suffix, then it applies to all interfaces unless
# overridden by the interface suffix.
#dns_domain_eth0="your.domain"
#dns_servers_eth0="192.168.0.2 192.168.0.3"
#dns_search_eth0="this.domain that.domain"
#dns_options_eth0="timeout:1 rotate"
#dns_sortlist_eth0="130.155.160.0/255.255.240.0 130.155.0.0"
# See the man page for resolv.conf for details about the options and sortlist
# directives

#ntp_servers_eth0="192.168.0.2 192.168.0.3"

#nis_domain_eth0="domain"
#nis_servers_eth0="192.168.0.2 192.168.0.3"

# NOTE: Setting any of these will stamp on the files in question. So if you
# don't specify dns_servers but you do specify dns_domain then no nameservers
# will be listed in /etc/resolv.conf even if there were any there to start
# with.
# If this is an issue for you then maybe you should look into a resolv.conf
# manager like resolvconf-gentoo to manage this file for you. All packages
# that baselayout supports use resolvconf-gentoo if installed.

#-----------------------------------------------------------------------------
# Cable in/out detection
# Sometimes the cable is in, others it's out. Obviously you don't want to
# restart net.eth0 every time when you plug it in either.
#
# netplug is a package that detects this and requires no extra configuration
# on your part.
# emerge sys-apps/netplug
# or
# emerge sys-apps/ifplugd
# and you're done :)

# By default we don't wait for netplug/ifplugd to configure the interface.
# If you would like it to wait so that other services now that network is up
# then you can specify a timeout here.
#plug_timeout="10"
# A value of 0 means wait forever.

# If you don't want to use netplug on a specific interface but you have it
# installed, you can disable it for that interface via the modules statement
#modules_eth0="!netplugd"
# You can do the same for ifplugd
#
# You can disable them both with the generic plug
#modules_eth0="!plug"

# To use specific ifplugd options, fex specifying wireless mode
#ifplugd_eth0="--api-mode=wlan"
# man ifplugd for more options

##############################################################################
# ADVANCED CONFIGURATION
# 
# Four functions can be defined which will be called surrounding the
# start/stop operations.  The functions are called with the interface
# name first so that one function can control multiple adapters. An extra two
# functions can be defined when an interface fails to start or stop.
#
# The return values for the preup and predown functions should be 0
# (success) to indicate that configuration or deconfiguration of the
# interface can continue.  If preup returns a non-zero value, then
# interface configuration will be aborted.  If predown returns a
# non-zero value, then the interface will not be allowed to continue
# deconfiguration.
#
# The return values for the postup, postdown, failup and faildown functions are
# ignored since there's nothing to do if they indicate failure.
#
# ${IFACE} is set to the interface being brought up/down
# ${IFVAR} is ${IFACE} converted to variable name bash allows

#preup() {
#	# Test for link on the interface prior to bringing it up.  This
#	# only works on some network adapters and requires the mii-diag
#	# package to be installed.
#	if mii-tool "${IFACE}" 2> /dev/null | grep -q 'no link'; then
#		ewarn "No link on ${IFACE}, aborting configuration"
#		return 1
#	fi 
#
#	# Test for link on the interface prior to bringing it up.  This
#	# only works on some network adapters and requires the ethtool
#	# package to be installed.
#	if ethtool "${IFACE}" | grep -q 'Link detected: no'; then
#		ewarn "No link on ${IFACE}, aborting configuration"
#		return 1
#	fi
#
#	# Test to see if we're docked or not and configure like so
#	# config_docked="dhcp"
#	if grep -q "1" /sys/devices/platform/dock.0/docked; then
#       einfo "${IFACE} is docked - configuring"
#		_configure_variables "docked"
#	fi
#
#	# Remember to return 0 on success
#	return 0
#}

#predown() {
#	# The default in the script is to test for NFS root and disallow
#	# downing interfaces in that case.  Note that if you specify a
#	# predown() function you will override that logic.  Here it is, in
#	# case you still want it...
#	if is_net_fs /; then
#		eerror "root filesystem is network mounted -- can't stop ${IFACE}"
#		return 1
#	fi
#
#	# Remember to return 0 on success
#	return 0
#}

#postup() {
#	# This function could be used, for example, to register with a
#	# dynamic DNS service.  Another possibility would be to
#	# send/receive mail once the interface is brought up.

#	# Here is an example that allows the use of iproute rules
#	# which have been configured using the rules_eth0 variable.
#	#rules_eth0=" \
#	#	'from 24.80.102.112/32 to 192.168.1.0/24 table localnet priority 100' \
#	#	'from 216.113.223.51/32 to 192.168.1.0/24 table localnet priority 100' \
#	#"
#	eval set -- $\rules_${IFVAR}
#	if [ $# != 0 ]; then
#		einfo "Adding IP policy routing rules"
#		eindent
#		# Ensure that the kernel supports policy routing
#		if ! ip rule list | grep -q "^"; then
#			eerror "You need to enable IP Policy Routing (CONFIG_IP_MULTIPLE_TABLES)"
#			eerror "in your kernel to use ip rules"
#		else
#			for x; do
#				ebegin "${x}"
#				ip rule add ${x} dev "${IFACE}"
#				eend $?
#			done
#		fi
#		eoutdent
#		# Flush the cache
#		ip route flush cache dev "${IFACE}"
#	fi

#}

#postdown() {
#	# Enable Wake-On-LAN for every interface except for lo
#	# Probably a good idea to set ifdown="no" in /etc/conf.d/net
#	# as well ;)
#	[ "${IFACE}" != "lo" ] && ethtool -s "${IFACE}" wol g

#	Automatically erase any ip rules created in the example postup above
#	if interface_exists "${IFACE}"; then
#		# Remove any rules for this interface
#		local rule
#		ip rule list | grep " iif ${IFACE}[ ]*" | {
#			while read rule; do
#				rule="${rule#*:}"	
#				ip rule del ${rule}
#			done
#		}
#		# Flush the route cache
#		ip route flush cache dev "${IFACE}"
#	fi

#	# Return 0 always
#	return 0
#}

#failup() {
#       # This function is mostly here for completeness... I haven't
#       # thought of anything nifty to do with it yet ;-)
#}

#faildown() {
#       # This function is mostly here for completeness... I haven't
#       # thought of anything nifty to do with it yet ;-)
#}