Static IP problem

IRIGHTI · 06-29-2005, 09:15 PM

I just setup a home network with slackware box as a firewall/http/etc server. It has two network cards one outward and one inward. Outward my ISP uses DHCP and inward it is at 10.1.10.0. I have a firewall built with iptables that also nats any computer on my internal network. I have one other system on my internal network. I set it up with an ip of 10.1.10.1, netmask 255.255.255.0, and the gateway as 10.1.10.0. When on my 10.1.10.1 system in Gentoo everything works like it should, no problems what so ever. However when I am in Slackware I cannot reach anything on the net. I can ping my gateway, but I cannot login to it through ssh (not a problem in Gentoo).

Does anyone have any idea what my problem could be? I checked route and the gateway is configured. The driver for my network card is built in to the kernel as it is in gentoo, and when I do 'ifconfig' it shows that eth0 is active. I guess the fact that I can ping the gateway proves that.

I am all out of ideas. Help.

Thanks.

itsjustme · 06-29-2005, 10:46 PM

Quote:

Originally posted by IRIGHTI
However when I am in Slackware I cannot reach anything on the net.

What's in your /etc/resolv.conf file?

IRIGHTI · 06-29-2005, 10:52 PM

A list of 3 nameservers and a search.........thing.

nameserver *.*.*.*
nameserver *.*.*.*
nameserver *.*.*.*
search ks.cox.net

the *.*.*.* are actually IP addresses. I have that from before. I only had the Gentoo/Slack box hooked up to the net (straight into cable modem). And all of it was written by dhcpcd.

gbonvehi · 06-29-2005, 11:23 PM

I don't get it... you've the same configuration on Slackware and Gentoo?
It should work if you do.
Check the output of ifconfig -a and route maybe your forgot the gateway.

IRIGHTI · 06-29-2005, 11:38 PM

I don't see anything wrong...

Code:

Output of route:

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
10.1.10.0       *               255.255.255.0   U     0      0        0 eth0
loopback        *               255.0.0.0       U     0      0        0 lo


Output of ifconfig -a:

dummy0    Link encap:Ethernet  HWaddr D2:FC:11:B1:4B:9A  
          BROADCAST NOARP  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

eth0      Link encap:Ethernet  HWaddr xx:xx:xx:xx:xx:xx  
          inet addr:10.1.10.1  Bcast:10.1.10.255  Mask:255.255.255.0
          inet6 addr: fe80::250:8dff:fed1:e494/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 b)  TX bytes:378 (378.0 b)
          Interrupt:18 Base address:0xa000 

ip6tnl0   Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          NOARP  MTU:1460  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

sit0      Link encap:UNSPEC  HWaddr 00-00-00-00-31-00-00-00-00-00-00-00-00-00-00-00  
          NOARP  MTU:1480  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

tunl0     Link encap:IPIP Tunnel  HWaddr   
          NOARP  MTU:1480  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

gbonvehi · 06-29-2005, 11:49 PM

Try:

Code:

route add default gw GATEWAYIP metric 1

or

Code:

route add -net 10.1.10.0 default gw GATEWAYIP metric 1

As stated by route, you don't have a gateway for your network.

You can configure the IP address and gateway in /etc/rc.d/rc.inet1.conf and will be loaded at boot.

By the way, usually the last number as 0 refers to the whole network range, you shouldn't use that number in a IP address.

IRIGHTI · 06-30-2005, 12:05 AM

I get: "SIOCADDRT: Network is unreachable."

What the?

Going to set the gateway to 10.1.10.1 and the other to 10.1.10.2.

And btw, I did set that up in rc.inet1.conf, that is why I was confused as to why it didn't work. Now I know...the network was unreachable....

This is the first home networking stuff I have ever done so bear with me.

IRIGHTI · 06-30-2005, 12:16 AM

Sweet!

Once I changed the gateway to 10.1.10.1 and the other to 10.1.10.2, everything works now.

I wonder why gentoo didn't care and slackware had a fit?

Oh well, lesson learned.

Thanks alot for your help gbonvehi. *gives virtual cookie*

davidsrsb · 06-30-2005, 10:22 AM

Slackware could have given a warning. The .0 address has come to be reserved for network name and .255 is subnet broadcast. The convention is to make the gateway either .1 or .254

mcd · 06-30-2005, 06:09 PM

i've had to manually add my default gateway several times in slackware, even though it's specified in /etc/rc.d/rc.inet1.conf. sometimes it just gets left out or something. could be something to do with assigning a static ip on a dhcp network maybe? i have no idea. most of the time it's fine though.