Network Setup

Lanmate · 02-22-2004, 10:59 AM

Hello,

The network settings below are the ones i was given by a colocation company for my box. As far as i know i need a broadcast address for the network interfaces.

IP Addresses:
213.228.232.58
213.228.232.59

Subnet mask:
255.255.255.0

Default gateway:
213.228.232.1

Is the following correct for the above settings? I have no way of testing this.

ifconfig eth0 213.228.232.58 netmask 255.255.255.0 up
ifconfig eth1 213.228.232.59 netmask 255.255.255.0 up
route add -net 213.228.232.255 netmask 255.255.255.0 eth0
route add -net 213.228.232.255 netmask 255.255.255.0 eth1
route add default gw 213.228.232.1 dev eth0
route add default gw 213.228.232.1 dev eth1

What i think is actually wrong with the box at the moment, the broadcast address is 213.228.232.0 instead of 213.228.232.255. Which file is this information stored in, and what would i need to change?

I have to give instructions to the colocation company to type into the box to bring up the networking, this would either be the set above, or information on which file to edit and how.

Thanks in advance.
Lanmate

Mathieu · 02-22-2004, 02:31 PM

A remote installation... Interesting.

Which Linux distribution are you using ?

Most Linux distribution store the configuration files for all network devices in the /etc/sysconfig/network directory.

The basic settings for a RedHat or Mandrake system are as follows, for example, let's use eth0.
/etc/sysconfig/network/ifcfg-eth0

Code:

DEVICE=eth0
BOOTPROTO=none
IPADDR=213.228.232.58
NETMASK=255.255.255.0
BROADCAST=213.228.232.255
NETWORK=213.228.232.0
ONBOOT=yes

For a SuSE system, it would look like this

Code:

BOOTPROTO='static'
IPADDR='213.228.232.58'
NETMASK='255.255.255.0'
NETWORK='213.228.232.0'
BROADCAST='213.228.232.255'
STARTMODE='onboot'

Note: The ifcfg-eth0 file varies depending on your Linux distribution.
Also, don't forget to make sure that the SSH server (sshd) is started automatically when the system boots up.

Lanmate · 02-22-2004, 02:39 PM

The distro is rh9. Everything is configured to run on boot, inclusing ssh, i tested this before i sent the box to the colocation company.

Would these file name still apply to redhat 9? And is the format they take on the same as mandrake?

Thanks
Lanmate

Mathieu · 02-22-2004, 03:09 PM

Yes. Mandrake is based on RedHat, so everything is the same.

Thus, the minimum settings for your eth0 on RH9 would be

Code:

DEVICE=eth0
BOOTPROTO=none
IPADDR=213.228.232.58
NETMASK=255.255.255.0
BROADCAST=213.228.232.255
NETWORK=213.228.232.0
ONBOOT=yes

You can also take a look at this document for more info.
http://www.redhat.com/support/resour...sysconfig.html

Lanmate · 02-22-2004, 03:20 PM

Thanks a lot! Ive been looking for something like that website for a while, searching to no avail.

Quick question, where did you get the value of the NETWORK from in the ifcfg-eth0 from the information i gave you?

Thanks
Lanmate

Mathieu · 02-22-2004, 08:21 PM

The broadcast address ends with .255 and the subnet (network address) ends with .0
Knowing this, I simply replace the last number of the IP.

If you want to learn more about TCP/IP and subnetting, take a look at Daryl's TCP/IP Primer.
http://www.ipprimer.com/overview.cfm

Lanmate · 02-23-2004, 04:32 AM

Another question, i specified the gateway 213.228.232.1, would it look to this address by default, because nowhere in your examples is there a gateway specified.

Thanks
Lanmate

Mathieu · 02-24-2004, 02:42 PM

Good question... I am not sure.

I believe so, it is common to see default gateways end with .1
Perhaps you should specify it manually.

You need to edit the /etc/sysconfig/network file and use one of the two options:[list=1]
GATEWAY=<value>, where <value> is the IP address of the network's gateway.
GATEWAYDEV=<value>, where <value> is the gateway device, such as eth0.[/list=1]
If you want to learn more about RedHat configuration, take a look at the Reference Guide

http://www.redhat.com/docs/manuals/linux/