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Linux - Networking This forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.

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Old 07-08-2004, 11:46 PM   #1
Wolfy
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Registered: Jun 2004
Location: WA
Distribution: Slackware 11 Kernel 2.6.20.7-SMP
Posts: 144

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Angry DHCP is unable to route cable connection


I have FC2 kernel version 2.6.5-1.358smp
running 3com905 NIC and
Compaq NIC

have installed DHCP server
followed plan from http://www.siliconvalleyccie.com/linux-hn/dchp.htm
but was unable to connect client PC to internet.
I have checked settings according to the plan outlined from the above web site but with no success.
I am in desperate need of help,
Does anybody have any suggestions?
 
Old 07-08-2004, 11:57 PM   #2
Wolfy
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Registered: Jun 2004
Location: WA
Distribution: Slackware 11 Kernel 2.6.20.7-SMP
Posts: 144

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to be more specific I want eth0 to obtain IP from cable modem.
Then eth1 to connect to hub and share internet connection from there.
 
Old 07-09-2004, 09:52 PM   #3
Wolfy
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Registered: Jun 2004
Location: WA
Distribution: Slackware 11 Kernel 2.6.20.7-SMP
Posts: 144

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Okay, whats happening is as soon as I activate the second NIC card all connectivity is lost.
I believe it to be the second NIC is not properly configured.

Now for me to understand exactly what I'm doing I would like someone to correct my logic if it is wrong.
First, eth0 must connect to cable modem with approved MAC address.
(note: it does this successfully)
Second, eth1 must be the middle man between the network hub and the Internet.
Now here in lies the problem.
I am assuming that eth1 must have a certain amount of set values to be able to do this.
I have researched this and assigned the following:
subnet-198.162.1.0
netmask-255.255.255.0
range-192.168.1.201 192.168.1.220
default-lease-time 86400;
max-lease-time 86400;
option routers 192.168.1.1;
option broadcast-address 192.168.1.255;
option subnet-mask 255.255.255.0;
option domain-name-servers 192.168.1.100;
option nntp-server 192.168.1.100;
With this in mind when I activate the second NIC everything goes dead as far as the Internet.
I have added route 255.255.255.255 for broadcast.
After configuration and reboot have tried [pgrep dhcpd] but don't receive any numbers.
To me it's obvious that something is not configured correctly, namely eth1.
And also perhaps trying to be a DHCP server and a router somehow don't mix well.
I have enabled IP packet routing in addition to installing DHCP server prior to this.
I am sure this is a configuration issue but I am at a loss.


Would someone please shed a little light on this for me.
 
  


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