Home Network won't work

Help - can't get the home network setup correctly!

I am trying to setup a home network/firewall machine. I have loaded
RedHat 9.0 on this machine. It is connected to a cable router on eth0
and a single dual-boot PC on eth1 (eventually it will be connected to a
hub - once it is working).

I can get the network machine to boot-up and see the internet. It also
obtains (dynamically) an ip-address from my ISP.

The problem is that I can not get the home side PC (either in windows or
linux) to work.

The route and ifconfig give some different results then I have seen and
I am not sure how to fix? Any ideas?

Specifically, the inet and Bcast addresses are different, WHY?:
inet: 123.151.60.244
Bcast: 123.151.63.255

Also, the route has an entry I do not know where it is coming from, any
ideas? How dow I remove it?
Destination Gateway Genmask Flags Metric Ref Use Iface
169.254.0.0 * 255.255.0.0 U 0 0 0 eth1

Here is the full-output...
ifconfig eth0:
eth0 Link encap:Ethernet HWaddr 00:26:54:07:F5:18
inet addr:123.151.60.244 Bcast:123.151.63.255 Mask:255.255.252.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:424836 errors:139 dropped:0 overruns:1 frame:206
TX packets:6657 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:34687028 (33.0 Mb) TX bytes:536985 (524.3 Kb)
Interrupt:5 Base address:0xc000

ifconfig eth1:
eth1 Link encap:Ethernet HWaddr 00:E0:18D:41:E7
inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:42540 (41.5 Kb) TX bytes:504 (504.0 b)
Interrupt:11 Base address:0x6000

and finally route:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use
Iface
192.168.1.0 * 255.255.255.0 U 0 0 0 eth1
123.151.60.0 * 255.255.252.0 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 123.151.60.1 0.0.0.0 UG 0 0 0 eth0

On Sun, 07 Sep 2003 20:45:27 -0700, timk wrote:
> Help - can't get the home network setup correctly!
>
> I am trying to setup a home network/firewall machine. I have loaded
> RedHat 9.0 on this machine. It is connected to a cable router on eth0
> and a single dual-boot PC on eth1 (eventually it will be connected to a
> hub - once it is working).

Go ahead and cable through hub. If not, you need a crossover cable
nic to nic.

>
> I can get the network machine to boot-up and see the internet. It also
> obtains (dynamically) an ip-address from my ISP.
>
> The problem is that I can not get the home side PC (either in windows or
> linux) to work.

in /etc/sysctl.conf
net.ipv4.ip_forward = 0 <==== set = 1

>
> The route and ifconfig give some different results then I have seen and
> I am not sure how to fix? Any ideas?
>
> Specifically, the inet and Bcast addresses are different, WHY?:
> inet: 123.151.60.244
> Bcast: 123.151.63.255
>
> Also, the route has an entry I do not know where it is coming from, any
> ideas? How dow I remove it?
> Destination Gateway Genmask Flags Metric Ref Use Iface
> 169.254.0.0 * 255.255.0.0 U 0 0 0 eth1
>
> Here is the full-output...
> ifconfig eth0:
> eth0 Link encap:Ethernet HWaddr 00:26:54:07:F5:18
> inet addr:123.151.60.244 Bcast:123.151.63.255 Mask:255.255.252.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:424836 errors:139 dropped:0 overruns:1 frame:206
> TX packets:6657 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:100
> RX bytes:34687028 (33.0 Mb) TX bytes:536985 (524.3 Kb)
> Interrupt:5 Base address:0xc000
>
> ifconfig eth1:
> eth1 Link encap:Ethernet HWaddr 00:E0:18D:41:E7
> inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
> UP BROADCAST MULTICAST MTU:1500 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:100
> RX bytes:42540 (41.5 Kb) TX bytes:504 (504.0 b)
> Interrupt:11 Base address:0x6000
>
> and finally route:
> Kernel IP routing table
> Destination Gateway Genmask Flags Metric Ref Use
> Iface
> 192.168.1.0 * 255.255.255.0 U 0 0 0 eth1
> 123.151.60.0 * 255.255.252.0 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 123.151.60.1 0.0.0.0 UG 0 0 0 eth0
>

Bit Twister wrote:
> On Sun, 07 Sep 2003 20:45:27 -0700, timk wrote:
>
>>Help - can't get the home network setup correctly!
>>
>>I am trying to setup a home network/firewall machine. I have loaded
>>RedHat 9.0 on this machine. It is connected to a cable router on eth0
>>and a single dual-boot PC on eth1 (eventually it will be connected to a
>>hub - once it is working).
>
>
> Go ahead and cable through hub. If not, you need a crossover cable
> nic to nic.
>

Okay, but what is the difference? Is there something special about a
crossover cable?

>
>>I can get the network machine to boot-up and see the internet. It also
>>obtains (dynamically) an ip-address from my ISP.
>>
>>The problem is that I can not get the home side PC (either in windows or
>>linux) to work.
>
>
> in /etc/sysctl.conf
> net.ipv4.ip_forward = 0 <==== set = 1
>

Yeah, it is set to 1. Any other suggestions I can try? I still don't
understand the route stuff below...

>
>>The route and ifconfig give some different results then I have seen and
>>I am not sure how to fix? Any ideas?
>>
>>Specifically, the inet and Bcast addresses are different, WHY?:
>>inet: 123.151.60.244
>>Bcast: 123.151.63.255
>>
>>Also, the route has an entry I do not know where it is coming from, any
>>ideas? How dow I remove it?
>>Destination Gateway Genmask Flags Metric Ref Use Iface
>>169.254.0.0 * 255.255.0.0 U 0 0 0 eth1
>>
>>Here is the full-output...
>>ifconfig eth0:
>>eth0 Link encap:Ethernet HWaddr 00:26:54:07:F5:18
>> inet addr:123.151.60.244 Bcast:123.151.63.255 Mask:255.255.252.0
>> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
>> RX packets:424836 errors:139 dropped:0 overruns:1 frame:206
>> TX packets:6657 errors:0 dropped:0 overruns:0 carrier:0
>> collisions:0 txqueuelen:100
>> RX bytes:34687028 (33.0 Mb) TX bytes:536985 (524.3 Kb)
>> Interrupt:5 Base address:0xc000
>>
>>ifconfig eth1:
>>eth1 Link encap:Ethernet HWaddr 00:E0:18D:41:E7
>> inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
>> UP BROADCAST MULTICAST MTU:1500 Metric:1
>> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>> TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
>> collisions:0 txqueuelen:100
>> RX bytes:42540 (41.5 Kb) TX bytes:504 (504.0 b)
>> Interrupt:11 Base address:0x6000
>>
>>and finally route:
>>Kernel IP routing table
>>Destination Gateway Genmask Flags Metric Ref Use
>>Iface
>>192.168.1.0 * 255.255.255.0 U 0 0 0 eth1
>>123.151.60.0 * 255.255.252.0 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 123.151.60.1 0.0.0.0 UG 0 0 0 eth0
>>

Bit Twister wrote:

>On Sun, 07 Sep 2003 21:33:33 -0700, timk wrote:
>
>
>>Bit Twister wrote:
>>
>>
>>>On Sun, 07 Sep 2003 20:45:27 -0700, timk wrote:
>>>
>>>
>>>
>>>>Help - can't get the home network setup correctly!
>>>>
>>>>I am trying to setup a home network/firewall machine. I have loaded
>>>>RedHat 9.0 on this machine. It is connected to a cable router on eth0
>>>>and a single dual-boot PC on eth1 (eventually it will be connected to a
>>>>hub - once it is working).
>>>>
>>>>
>>>Go ahead and cable through hub. If not, you need a crossover cable
>>>nic to nic.
>>>
>>>
>>>
>>Okay, but what is the difference? Is there something special about a
>>crossover cable?
>>
>>
>
>
>Yes, tx/rx pins are crossed to each other.
>
>
>
>>>>I can get the network machine to boot-up and see the internet. It also
>>>>obtains (dynamically) an ip-address from my ISP.
>>>>
>>>>The problem is that I can not get the home side PC (either in windows or
>>>>linux) to work.
>>>>
>>>>
>>>in /etc/sysctl.conf
>>>net.ipv4.ip_forward = 0 <==== set = 1
>>>
>>>
>>>
>>Yeah, it is set to 1. Any other suggestions I can try? I still don't
>>understand the route stuff below...
>>
>>
>
>Here is mine, I have eth1 to cable, eth0 to hub
>the UG line is the gateway to my ISP gateway 12.209.206.1
>all LAN traffic (192.168.1.*) goes to eth0.
>
>/sbin/route -n
>Kernel IP routing table
>Destination Gateway Genmask Flags Metric Ref Use Iface
>192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
>12.209.206.0 0.0.0.0 255.255.254.0 U 0 0 0 eth1
>127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
>0.0.0.0 12.209.206.1 0.0.0.0 UG 0 0 0 eth1
>
>You do appear the have an extra eth1
>
>
>
>>>>and finally route:
>>>>Kernel IP routing table
>>>>Destination Gateway Genmask Flags Metric Ref Use
>>>>Iface
>>>>192.168.1.0 * 255.255.255.0 U 0 0 0 eth1
>>>>123.151.60.0 * 255.255.252.0 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 123.151.60.1 0.0.0.0 UG 0 0 0 eth0
>>>>
>>>>
>
>
>You need to get rid of the following line.
>
>
>
>>>>169.254.0.0 * 255.255.0.0 U 0 0 0 eth1
>>>>
>>>>
Okay, so how do I do that?

tk wrote:

>>You need to get rid of the following line.

>>>>169.254.0.0 * 255.255.0.0 U 0 0 0
>>>>>eth1

> Okay, so how do I do that?

It must have got there somehow.
Try "grep -r 169.254 /etc".



--
Timothy Murphy
e-mail: (E-Mail Removed)
tel: +353-86-233 6090
s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland

Thanks, I found this being put in under
/etc/sysconfig/network-scripts/ifup. Why I am not sure. So I commented
that out and the route table looks more like it should.
But, I still cannot get the home side of the network to work? I tried
swaping cables and swaping cable and home ports to no avail.
I am using default installed Redhat 9.0. Do I need to recompile the
kernel for some reason?

Timothy Murphy wrote:
> tk wrote:
>
>
>>>You need to get rid of the following line.
>
>
>>>>>169.254.0.0 * 255.255.0.0 U 0 0 0
>>>>>
>>>>>>eth1
>
>
>>Okay, so how do I do that?
>
>
> It must have got there somehow.
> Try "grep -r 169.254 /etc".
>
>
>