Networking problems with static IP

shoot · n00b Joined: 20 Sep 2006 Posts: 9

Hello there, I have a major problem with my eth0-config. I recently installed gentoo on my server to act as a webserver and a router. The problem is that I haven't really got started yet since my network seems to be giving me huge amounts of problems. I have a friend that has tried helping me to fix it, I'll get more to what we've already tried later, but first I'll give you some info about ifconfig eth0 and my ISPs settings.

First, I'm using a static ISP directly connecting to internet (no dhcp or automatic IP). this is my ifconfig eth0:

eth0 link encap: Ethernet HWaddr FF:FF:FF:FF:FF:FF
inet addr: 83.227.xxx.xxx Bcast: 83.227.xxx.0 Mask:xxx.xxx.xxx.xxx
UP BROADCAST NOTRAILERS RUNNING MULTICAST MTU:1500 Metric:1

there's also some more stuff below here but it's nothing of importance I think and it doesn't look suspicious either so. Anyway me and my friend has tried changing broadcast-ip and some other stuff(therefore the Bcast atm is 83.227.xxx.0, we think the problem is something with broadcast-ip since I can surf under windows on two other computers in the network easily.)

My ISP has given me some information for the static ip, such as the ip, netmask, gateway, dns1 and dns2. However, none about broadcast-ip. Also a note here is that my ISP is bredbandsbolaget. (http://bredbandsbolaget.se)

When I do /etc/init.d/net.eth0 restart it gives me zero errors, only "OK"'s. Pinging 127.0.0.1 works fine, but pinging my gateway or dnsservers just gives me "destination host unreachable". Btw, I've added the gateway using "route add default gw 83.227.xxx.xxx".

Has anyone experienced this before, or is it just me? Since I can't seem to find any other thread that gives a valid help enough for me to get my net up.

Regards
shoot

magic919 · Posted: Wed Sep 20, 2006 1:34 pm Post subject:

You need to explicitly give it the IP, the subnet mask and the default gateway. Your gateway may well be x.x.x.1. You can verify these from the Windows machine, dare I suggest.

shoot · n00b Joined: 20 Sep 2006 Posts: 9

I have the information needed, I think. I have my static ip, gateway. netmask and two dns servers. I set eth0 up with ifconfig eth0 ${IP_ADDR} broadcast ${BROADCAST} netmask ${NETMASK} up.
I've also typed route add default gateway 83.227.xxx.xxx

I have no idea what to type as broadcastadress, I've tried my ip and 0 or 255 in the end instead of mine, which didn't work(Actually this is what net-setup eth0 told me to do first time. That's why I typed 83.227.xxx.255/0. I've also tried 0.0.0.0 with no success.)

Regards
shoot

magic919 · Posted: Wed Sep 20, 2006 2:10 pm Post subject:

Why do you feel the need to specify the broadcast address anyway?

Destination host unreachable suggests routing problem. Skip the broadcast address, get the other stuff right and test. Post then ifconfig and route outputs.

Would be much easier if you'd just substitute dummy numbers as you are just making it harder to help. I'd have just hidden the first 2 octets personally and changed the third octet to help obscure if you must.

shoot · n00b Joined: 20 Sep 2006 Posts: 9

Sorry.

First I ran ifconfig eth0 83.227.xxx.216 netmask 255.255.255.192 up
Then route add default gw 83.227.xxx.193

After that i edited /etc/resolv.conf:

P3SM · Posted: Wed Sep 20, 2006 3:20 pm Post subject:

Just my 2c:

Your broadcast address should be 255 as that is the last address in your subnet which runs from 83.227.xxx.192 (network address) till 83.227.xxx.255 (broadcast address) when your address is 216 with a /26 subnet.

I normally use the following command to put in my default route:

shoot · n00b Joined: 20 Sep 2006 Posts: 9

Firstly, thanks for the idea, I'll try it out soon(I'm making dinner now so it's quite a bad timing to test it right now

)
Second, regarding this:

shoot · n00b Joined: 20 Sep 2006 Posts: 9

magic919 · Posted: Wed Sep 20, 2006 5:38 pm Post subject:

You'd have to say that even without a gateway defined you should be able to ping the gateway as it is on the same subnet. I'd drop out all the unnecessary.

shoot · n00b Joined: 20 Sep 2006 Posts: 9

shoot · n00b Joined: 20 Sep 2006 Posts: 9

I've now tried turning my modem off for 20 mins to see if it was some trouble regarding mac adresses. I fired everything up and still no success with pinging neither gateway nor dns's. I redid everything this time using net-setup eth0 and that didn't give me any success either. Has noone ever experienced this problem?

Btw, I can ping my gateway from other internet connections(!)

Regards
shoot

Edit:

Ok, so I once again restarted the computer. Booted into gentoo again and also once again set up net-setup eth0 according to how my ip's are set. /etc/init.d/net.eth0 restart gave me some error response though, my friend pointed out that I should check /var/log/messages/ and this is what it says:

P3SM · Posted: Wed Sep 20, 2006 9:29 pm Post subject:

shoot · n00b Joined: 20 Sep 2006 Posts: 9

Aha!

I'll try the new one then :lol:

Regards
shoot

Edit:

I have now tried two things. First the stuff about route add -net etc. This gave no success either. I had a chat with my friend and we figured out since I do have username and password (however I never use them to access internet) I should try to check if it had pppoe. So I setup pppoe-setup and did pppoe-start. Still no success.

Am I supposed to use my username/password anywhere, even though I have never done so? What I know they are only used on the website for my ISP. Actually, I have used to username/password once, and that was when I activated my internet the first time.

x22 · Apprentice Joined: 24 Apr 2006 Posts: 208

shoot · n00b Joined: 20 Sep 2006 Posts: 9

blueaura · n00b Joined: 05 Sep 2005 Posts: 66

I have the exact same problem with a marvell and nvidia controller. Neither seem to realise 192.168.0.1 is a router although a route is set up. Bizzare!

wynn · Advocate Joined: 01 Apr 2005 Posts: 2421 Location: UK

A builtin card here showed Ethernet HWaddr FF:FF:FF:FF:FF:FF and it was a card fault (hardware)
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blueaura · n00b Joined: 05 Sep 2005 Posts: 66

Give something like this a go...

/etc/conf.d/net

jtp755 · l33t Joined: 01 Sep 2003 Posts: 691 Location: USA

just thought id let yall know that the last post fixed the problem for me too.
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z1-tram · Posted: Sun Oct 29, 2006 8:20 am Post subject:

Fixed my problem too!

Thanks blueaura!

daN-the-man · n00b Joined: 30 Oct 2005 Posts: 2

and mine too! thank you very much!

blueaura · n00b Joined: 05 Sep 2005 Posts: 66

It also fixed mine again on another new install on a different machine. Must be a new build of something which needs dns servers and gateways to be defined.