hello everybody..

i'm trying to set up a redhat 9 box to server as a router/gateway for my house.
i'd like the setup to be;

12-port hub -------> linux router/gateway on eth1 -------> internet on linux router/gateway eth0

so far i have both the ethernet cards set up. here's the output of 'ifconfig':


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eth0 Link encap:Ethernet HWaddr 00:20:78:E0:82:CE
inet addr:192.168.2.81 Bcast:192.168.2.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:918 errors:0 dropped:0 overruns:0 frame:0
TX packets:1055 errors:6 dropped:0 overruns:0 carrier:6
collisions:0 txqueuelen:100
RX bytes:451750 (441.1 Kb) TX bytes:163195 (159.3 Kb)
Interrupt:11 Base address:0x3f00

eth1 Link encap:Ethernet HWaddr 00:20:AF:A2:5E:CE
inet addr:10.0.0.1 Bcast:10.0.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:0 (0.0 b) TX bytes:798 (798.0 b)
Interrupt:13 Base address:0x300

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(ommited the lo device)
and here's the output of 'route':

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Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.0.0.0 * 255.255.255.0 U 0 0 0 eth1
192.168.2.0 * 255.255.255.0 U 0 0 0 eth0
169.254.0.0 * 255.255.0.0 U 0 0 0 eth1
127.0.0.0 * 255.0.0.0 U 0 0 0 lo
default 192.168.2.1 0.0.0.0 UG 0 0 0 eth0

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i have dhcpd set up as so:


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ddns-update-style none;
ignore client-updates;

subnet 10.0.0.0 netmask 255.255.255.0 {
server-name "therouter";
option routers 10.0.0.1;
option subnet-mask 255.255.255.0;
option domain-name-servers 209.53.4.130 209.53.4.150;
option netbios-name-servers 10.0.0.1;
range 10.0.0.2 10.0.0.200;
default-lease-time 86400;
max-lease-time 25902000;
}

==================================================

my only problem is....... any computer hooked up to the hub doesn't recive any informatin from the dhcpd server.....

'ifup eth0' on a linux computer connected to the hub shows:


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Determining IP information for eth0...failed; no link present. Check cable?


==================================================

so...... ummm...... i'm stuck. i've been at this for almost a week now, and feeling like quite the big noob. any help much appreciated.


thanks,
rebelcan

It is hard to say what the problem is, at least for me.

If you set the other computer with a static IP, can It see (ping, pump, etc) the router? I mean, is the conection working?. If it is then try to pump the IP manually... if it works check your ifup script.

I think if you have a 10.* IP-address the subnet mask will be 255.0.0.0

When I start dhcpd. I specify the interface that it is to listen on.
Like this :

dhcpd eth1

Using RH9 I edited the /etc/sysconfig/dhcpd
file so it reads:

DHCPDARGS=eth1

Not necessarily. The IP range for eth1 as it is set up is 10.0.0.0/24 (10.0.0.x, netmask 255.255.255.0) for a home network, although it could theoretically be 10.0.0.0/8 (10.x.x.x, netmask 255.0.0.0), but that is a little too big of a subnet for a private LAN.

Once you get the DHCP working, you'll need to configure iptables (the kernel-level firewall for Linux) for NAT, IP forwarding, and masquerading. I suggest this post:
http://www.linuxquestions.org/questi...hreadid=121379

well... when i set the non-router linux conputer with 'ifconfig eth0 10.0.0.2 netmask 255.255.255.0' and 'route add default gw 10.0.0.1', it still can't ping the router.

here's what 'route' shows on the non-router linux computer:

Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.0.0.0 * 255.255.255.0 U 0 0 0 eth0
default 10.0.0.1 0.0.0.0 UG 0 0 0 eth0

on the router, when i start up dhcpd manually by typing 'dhcpd eth1', these are the last few lines the it prints to the screen:

Listening on LPF/eth1/00:20:af:a2:5e:ce/10.0.0.0/24
Sending on LPF/eth1/00:20:af:a2:5e:ce/10.0.0.0/24
Sending on Socket/fallback/fallback-net

i was wondering if this would have anything to do with the trouble i'm having.

one last thing..... i noticed that when i look at the ethernet card that is connected to the internet (eth0) on the router, it has a light that is lit up ( green ).

for the non-router linux computer, however, the ethernet card isn't lit up. but when i take the cable from the router and plug it into the non-router, it's ethernet card light turns on. i was wondering if there's some sort of setting i have to setup so that the router brodcasts a certain signal to all the computers connected to the hub, or if that's just a light saying there's a data transfer going on.

Looks like there is a physical problem with either your hub or the cables connecting both computers to the hub. Does the hub show any green lights lit up when the computers are plugged into it? If one is out, it's probably a bad cable. If both are out, maybe you have a bad hub. Are the computers close enough together where you could test their connection with a single crossover cable?

well... i fixed the hub problem... there was a little button that was called MDI/MDIX... and it was set to MDI... i changed it to MDIX and it works fine now. don't have a clue what that did though. now the non-linux computer can get it's dhcp stuff just fine, it's getting to the internet that's a problem.

i just have to get eth1 working again..... when i try 'modprobe 3c509 "irq=13" ', the module loads correctly and everything, but 'ifup eth1' doesn't work.

"there was a little button that was called MDI/MDIX"

That was to change the port to crossover mode. When connecting Device to Device you need to use a crossover cable. Either you depress a button like the one you saw or you use a cable that crossess over pins 1,2 with pins 3,6 on the ethernet jack.

"getting to the internet that's a problem."

Just keep pinging away and you'll get there.