Configuring RH8 to use an ADSL Modem/Router

[Rick Stevens]

Graeme Nichols wrote:
> On Wed, 2004-06-02 at 04:07, Rick Stevens wrote:
> 
>>Graeme Nichols wrote:
> 
> <snip>
> 
>>>Thank you for your help.
>>
>>Looks like there's lots of help here, but there are several things that
>>must be set up for DHCP stuff to work.  It's easiest to use the
>>"redhat-config-network" tool to set these up, but should you wish to do
>>it manually, the files that are affected are:
>>
>>/etc/sysconfig/network:
>>
>>	HOSTNAME=your.host.name
>>	NETWORKING=yes
>>
>>/etc/sysconfig/network-scripts/ifcfg-eth0:
>>
>>	DEVICE=eth0
>>	BOOTPROTO=dhcp
>>	ONBOOT=yes
>>
>>/etc/dhclient/dhclient.conf
>>
>>	timeout 60;
>>	retry 60;
>>	reboot 10;
>>	select-timeout 5;
>>	initial-interval 2;
>>
>>	interface "eth0" {
>>	    request subnet-mask, broadcast-address, routers;
>>	    request domain-name-servers;
>>	    require subnet-mask, routers, domain-name-servers;
>>	}
>>
>>Since DHCP requires the help of a DHCP client program (under RH8.0 and
>>9, this is "dhclient"), you must set up the dhclient.conf file as I show
>>above.  Your router must also have its DHCP server bit enabled.  The
>>dhclient program actually fetches the IP address, netmask, default route
>>and DNS server data and applies it.
>>
>>If you want to manually set up a fixed IP address, you need to tweak
>>three files:
>>
>>/etc/sysconfig/network:
>>
>>	HOSTNAME=your.host.name
>>	NETWORKING=yes
>>	GATEWAY=192.168.0.254	(the LAN address of your router)
>>
>>/etc/sysconfig/network-scripts/ifcfg-eth0:
>>
>>	DEVICE=eth0
>>	BOOTPROTO=static
>>	ONBOOT=yes
>>	IPADDR=192.168.0.1 (or choose one from .1 to .253, inclusive)
>>	NETMASK=255.255.255.0 (choose one as appropriate)
>>	NETWORK=192.168.0.0 (OPTIONAL -- you really don't need this)
>>	BROADCAST=192.168.0.255 (OPTIONAL -- you really don't need this)
>>
>>/etc/resolv.conf:
>>	nameserver IPaddress-of-a-DNS-server
>>	nameserver IPaddress-of-a-second-DNS-server (OPTIONAL)
>>	nameserver IPaddress-of-a-third-DNS-server (OPTIONAL)
>>
>>The "IPaddress-of-a-DNS-server" should be the IP address(es) of your
>>ISP's DNS server(s).  These should NOT be addresses in the 192.168
>>network.
>>
>>To verify that things are set up correctly (regarless of static or DHCP
>>address settings), you should be able to:
>>
>>	ifconfig eth0
>>
>>and see an address in the 192.168.0.something range.  It should be "UP"
>>and have a reasonable netmask.  Next,
>>
>>	netstat -rn
>>
>>should show a line such as:
>>
>>	0.0.0.0  192.168.0.254   0.0.0.0  UG        0 0          0 eth0
>>
>>The important bit is the "UG", which indicates your default gateway, and
>>that "192.168.0.254" is the gateway itself.  Finally, take a look at
>>/etc/resolv.conf.  If things are correct, it should have one or more
>>"nameserver" lines with the IP addresses of the DNS servers you'll use
>>(yes, dhclient will rewrite this file if you use DHCP).
>>
>>If that's all good, you should be able to "dig some-site-name" and get
>>the IP address of the site (proves that DNS is working), and you should
>>be able to ping both your router's LAN IP (in this case, 192.168.0.254)
>>AND it's WAN interface (you'll need to check which address that is with
>>your router).  You can also verify the NAT mechanism by visiting:
>>
>>	http://www.rhil.net/fancywhatip.html
>>
>>That page will show you which IP you're coming from (it should match the
>>WAN address of your router).
>>----------------------------------------------------------------------
>>- Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
>>- VitalStream, Inc.                       http://www.vitalstream.com -
>>-                                                                    -
>>-   Which is worse: ignorance or apathy?  I don't know.  Who cares?  -
>>----------------------------------------------------------------------
>>
>>
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> 
> 
> Hi Rick, Everything seems to be working just fine. I didn't set up DHCP
> but everything else is as you said. I sent an email to you and the
> mailing list asking about a couple of other things I need your expertise
> on. I hope I'm not being too much of a nuisance.

No, you're fine.  Some times I get rather busy and can't answer right
away.  As long as the members of the list know and understand that,
we're fine.

> Thank you very much for all your help in this matter.

"That's what we're here for!" (c)2004, Red Hat Install List ;-)
----------------------------------------------------------------------
- Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
- VitalStream, Inc.                       http://www.vitalstream.com -
-                                                                    -
-                  Heisenberg _may_ have slept here                  -
----------------------------------------------------------------------