Text Based Network Configuration

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Author: David Mandala
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Subject: Text Based Network Configuration

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Not sure where there is documentation on this (though I'm sure there is a
howto somewhere). But for informational purposes I'll give it a try.

For general Redhat systems (also mostly correct for Mandrake):
File                General info                more
info
/etc/resolv.conf    -> list your nameservers one per line     man
resolv.conf
/etc/hosts        -> list of hostname to ip resolution    man hosts

The rest of these files appear to be redhat specific for the most part

/etc/sysconf/static-routes
/etc/sysconf/static-routes-ipv6
The above files store static routes that are to be loaded at startup, sorry
it's been a while and I don't remember the file format but you can read the
file "/etc/sysconf/network-scripts/ifup and figure it out for both if
needed.

etc/sysconf/network
This file contains several entries necessary for configuration of networking
one entry per line in a tag=value format. blank lines appear to be ok, # is
a comment and comments to the end of the line.

In my network configuration I have 3 entries NETWORKING, HOSTNAME, and
FORWARD_IPV4.

NETWORKING=yes  # appears to have two values yes and no. no turns off
external netowrking
HOSTNAME=CX868974-C # is assigned my you to condifure the hostname, 
                    # if not assigned and using dhcp for network info 
                    # the hostname can be assigned bu dhcp
FORWARD_IPV4=false  # appears to have two values true and false. If the
boxen has two or more
                    # interfaces true configures as a router and will
forward packets 
                    # inbetween interfaces. Should read the router howto for
more information.
FORWARD_IPV6=false  # same as IPV4 but for ip version 6, make sure your
kernel is configured for this.

/etc/sysconf/network-scripts/ifcfg-lo -> configures the 127.0.0.1 interface
/etc/sysconf/network-scripts/ifcfg-eth0 -> configures the first ethernet
interface
/etc/sysconf/network-scripts/ifcfg-eth0:0 -> configures the first ethernet
alias on the first ethernet interface
/etc/sysconf/network-scripts/ifcfg-eth1 -> configures the second ethernet
interface
/etc/sysconf/network-scripts/ifcfg-eth1:0 -> configures the second ethernet
alias on the second ethernet interface

The content of the files are very simular, they use a tag=value format.

DEVICE=eth0 # the physcial device name MUST EXIST and must match the base
name of the file!
BOOTPROTO=dhcp # the boot protocol to be used if any, dhcp, bootp, none
ONBOOT=yes # is this device to be activated upon booting the system
BROADCAST=127.255.255.255 # the broadcast address for the interface
NAME=loopback # the name assigned to the interface
IPADDR=127.0.0.1 # the ip address to be assigned to this interface if not
using a boot protocol
NETMASK=255.0.0.0 # the mask assigned to this interface, only assigned if
not using a boot protocol
NETWORK=127.0.0.0 # the network the interface is in, only assigned if not
using a boot protocol

/etc/sysconf/network-scripts/ifup
/etc/sysconf/network-scripts/ifdown

These files are used to bring up and down the interfaces. ifup eth0 or
ifdown eth0

Hope this helps

> -----Original Message-----
> From: Simper, Brian D [mailto:brian.d.simper@intel.com]
> Sent: Friday, December 07, 2001 1:10 PM
> To: 'plug-discuss@lists.PLUG.phoenix.az.us'
> Subject: Text Based Network Configuration
>
>
>
> I am looking for command line or text based network
> configuration tools. As
> you may be aware, Red Hat does not include linuxconf or
> netconf with RH 7.1
> or 7.2. Admittedly, using this venerable tool could cause
> problems but
> netconf was functional once you got past the quirks.
>
> The new graphical tools are OK, but I don't always have access to the
> console and sometimes I want to build a server without a GUI.
> So how do you
> make changes to the network with text only tools? Is there a complete
> reference showing exactly which configuration files you can
> manually edit
> and which services to manually start to get the network configured?
>
> Thanks,
>
> Brian
> ________________________________________________
> See http://PLUG.phoenix.az.us/navigator-mail.shtml if your
> mail doesn't post to the list quickly and you use Netscape to
> write mail.
>
> PLUG-discuss mailing list - PLUG-discuss@lists.PLUG.phoenix.az.us
> http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss
>

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<TITLE>RE: Text Based Network Configuration</TITLE>
</HEAD>
<BODY>

Not sure where there is documentation on this (though =
I'm sure there is a howto somewhere). But for informational purposes =
I'll give it a try.

For general Redhat systems (also mostly correct for =
Mandrake):
 File    =
        =
        =
        General =
info            =
        =
        more info
 /etc/resolv.conf        =
-> list your nameservers one per line   man resolv.conf
 /etc/hosts      =
        -> list of hostname to ip =
resolution    man hosts


The rest of these files appear to be redhat specific =
for the most part

 

/etc/sysconf/static-routes
 /etc/sysconf/static-routes-ipv6
 The above files store static routes that are to be =
loaded at startup, sorry it's been a while and I don't remember the =
file format but you can read the file =
"/etc/sysconf/network-scripts/ifup and figure it out for both if =
needed.
 

etc/sysconf/network
 This file contains several entries necessary for =
configuration of networking one entry per line in a tag=3Dvalue format. =
blank lines appear to be ok, # is a comment and comments to the end of =
the line.

In my network configuration I have 3 entries =
NETWORKING, HOSTNAME, and FORWARD_IPV4.


NETWORKING=3Dyes  # appears to have two values =
yes and no. no turns off external netowrking
 HOSTNAME=3DCX868974-C # is assigned my you to =
condifure the hostname, 
           &nb=
sp;         # if not assigned =
and using dhcp for network info 
           &nb=
sp;         # the hostname can =
be assigned bu dhcp
 FORWARD_IPV4=3Dfalse  # appears to have two =
values true and false. If the boxen has two or more
           &nb=
sp;         # interfaces true =
configures as a router and will forward packets 
           &nb=
sp;         # inbetween =
interfaces. Should read the router howto for more information.
 FORWARD_IPV6=3Dfalse  # same as IPV4 but for ip =
version 6, make sure your kernel is configured for this.


/etc/sysconf/network-scripts/ifcfg-lo -> =
configures the 127.0.0.1 interface
 /etc/sysconf/network-scripts/ifcfg-eth0 -> =
configures the first ethernet interface
 /etc/sysconf/network-scripts/ifcfg-eth0:0 -> =
configures the first ethernet alias on the first ethernet =
interface
 /etc/sysconf/network-scripts/ifcfg-eth1 -> =
configures the second ethernet interface
 /etc/sysconf/network-scripts/ifcfg-eth1:0 -> =
configures the second ethernet alias on the second ethernet =
interface


The content of the files are very simular, they use a =
tag=3Dvalue format.


DEVICE=3Deth0 # the physcial device name MUST EXIST =
and must match the base name of the file!
 BOOTPROTO=3Ddhcp # the boot protocol to be used if =
any, dhcp, bootp, none
 ONBOOT=3Dyes # is this device to be activated upon =
booting the system
 BROADCAST=3D127.255.255.255 # the broadcast address =
for the interface
 NAME=3Dloopback # the name assigned to the =
interface
 IPADDR=3D127.0.0.1 # the ip address to be assigned =
to this interface if not using a boot protocol
 NETMASK=3D255.0.0.0 # the mask assigned to this =
interface, only assigned if not using a boot protocol
 NETWORK=3D127.0.0.0 # the network the interface is =
in, only assigned if not using a boot protocol

 

/etc/sysconf/network-scripts/ifup
 /etc/sysconf/network-scripts/ifdown


These files are used to bring up and down the =
interfaces. ifup eth0 or ifdown eth0


Hope this helps


> -----Original Message-----
 > From: Simper, Brian D [<A =
HREF=3D"mailto:brian.d.simper@intel.com">mailto:brian.d.simper@intel.com=
</A>]
 > Sent: Friday, December 07, 2001 1:10 PM
 > To: =
'plug-discuss@lists.PLUG.phoenix.az.us'
 > Subject: Text Based Network =
Configuration
 > 
 > 
 > 
 > I am looking for command line or text based =
network 
 > configuration tools.  As
 > you may be aware, Red Hat does not include =
linuxconf or 
 > netconf with RH 7.1
 > or 7.2.  Admittedly, using this venerable =
tool could cause 
 > problems but
 > netconf was functional once you got past the =
quirks.  
 > 
 > The new graphical tools are OK, but I don't =
always have access to the
 > console and sometimes I want to build a server =
without a GUI. 
 >  So how do you
 > make changes to the network with text only =
tools?  Is there a complete
 > reference showing exactly which configuration =
files you can 
 > manually edit
 > and which services to manually start to get the =
network configured?
 > 
 > Thanks,
 > 
 > Brian
 > =
________________________________________________
 > See <A =
HREF=3D"http://PLUG.phoenix.az.us/navigator-mail.shtml" =
TARGET=3D"_blank">http://PLUG.phoenix.az.us/navigator-mail.shtml</A> if =
your 
 > mail doesn't post to the list quickly and you =
use Netscape to 
 > write mail.
 > 
 > PLUG-discuss mailing list  -  =
PLUG-discuss@lists.PLUG.phoenix.az.us
 > <A =
HREF=3D"http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss" =
TARGET=3D"_blank">http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-=
discuss</A>
 > 


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