[CLOSED] Routing table issue (see last post)

Gentoo-Ed · Last edited by Gentoo-Ed on Sat Apr 18, 2009 8:34 am; edited 12 times in total

I'm installing a home gentoo network. I've got my clients up and my server. All can connect to internet. The clients wireless, the server wired. The server has a static IP, its IP is on the same subnet.

However I can't ping any systems crosswise (client to client, server to client). Even the windows client doesn't find them. What have I misconfigured?

Even if I make the clients use static IP's it won't work. Wired with dhcp it will work...

My guess is that it's messing with eth0 for some reason

Status:
I cann't ping anything

DawgG · l33t Joined: 17 Sep 2003 Posts: 874

i think i need more info for a good answer, but ill try.
the server has got an ethernet-nic with a static ip connected directly to the internet and a wireless nic that serves the wireless clients (?). is it ac-hoc or ap mode? you might need to set up a bridge to physically connect the wireless to the wired network it you want to ping (because "inside" the network this is not done by software like iptables or routing afaik) build a bridge from the wireless and the wired card on the server and give it the local address, then it should work.

if you have an extra appliance it maybe that its os cannot do the stuff you want (deliver packets between wireless clients; maybe it can only forward them to its wan port)
GOOD LUCK!
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Gentoo-Ed · Posted: Mon Mar 09, 2009 3:54 pm Post subject:

Ah, let me explain the setup.

A modem is connected to a router. This has dhcp for wired and wireless. The same scope is used for both. My server is a computer which has no keyboard or mouse or screen and will just be used for files, mail, databases and stuff. The clients are laptops. The server is configured with a static IP. If I connect using a wired connection (eth0 dhcp) on the laptop it finds the server. If on the same client I stop eht0 and use ping -Iwlan0 the server isn't connected. Ifconfig shows the correct settings. In the hosts file I have a entry for the laptop and the server. The laptop only as 127.0.0.1 HOSTNAME localhost. The server entry as IP SERVERNAME. I don't have a dns server. The nameserver entry is my default gateway (router) and that works for internet. If I configure the wlan0 with static ip it still doesn't find the server. I don't have a domain name configured anywhere. Is this needed?

Pinging on IP:
From LAPTOP 2 to LAPTOP 1 with wireless - Pinagble
From LAPTOP 2 to GATEWAY with wireless - Pinagable
From LAPTOP 1 to GATEWAY with wireless - not pingable
From LAPTOP 2 to SERVER with wireless - not pingable
FROM LAPTOP 1 to GATEWAY with wired - Pingable
FROM LAPTOP 1 to SERVER with wired - Pingable

DawgG · l33t Joined: 17 Sep 2003 Posts: 874

thx for the info (i was thinking about a server serving stuff to the internet, but network-wise it's just another ip in the same subnet)
i think the problem may be with your appliance - is it fancy and expensive with a lot of options or rather some el-cheapo supermarket-stuff? because i once had one of the cheap ones and it would just do some ethernet-switching but just send all wireless-traffic to its wan interface (no bridging function i think). have you (or has anybody else) used it successfully in a setup like yours? to me this problem seems most likely.

Gentoo-Ed · Posted: Mon Mar 09, 2009 5:31 pm Post subject:

All the nics are working for internet. The appliance is working correctly (siemens gigaset SE366 WLAN), with a windows setup it works, I'm switching to linux now.

I'll do some file comparing of the laptops.

[EDIT]
LAPTOP 2 discovers the WLAN0 before it's ETH0.
If I put the computer name of LAPTOP 2 and the SERVER in the hosts file of LAPTOP 2 and ping the SERVER it will say IP-static.albacom.net. Where is this comming from??? I haven't configured albacom anywhere.

[EDIT 2]
:oops:

I just thought of something while at work. My internal address range is propably the cause. It's not a reserved private network. I'll reconfigure it all tonight and see.

Gentoo-Ed · Posted: Tue Mar 10, 2009 4:27 pm Post subject:

Well I placed my internal nics to 192.168.1.n and that is all working again.

Unfortunatly no difference. One laptop can reach the windows wireless client, gateway and such the other can't, that one also still can't connect to the internet too.

Can it be that in one laptop the kernel is still the default genkerenel? In the working laptop I adjusted the kernel some bit. I don't know so much about it yet so left the kernel as is.

All systems use ifconfig, iwconfig with wpa_supplicant for wireless, and dhcpcd to obtain ip adresses. All obtained Ip's are valid.

I hope to solve it soon, for it's preventing me setup my network.

[EDIT]
I found this ubuntu post. There it mentions a solution but I don't know what it does and if there is such a thing for gentoo. http://ubuntuforums.org/archive/index.php/t-985299.html

Gentoo-Ed · Posted: Wed Mar 25, 2009 4:32 pm Post subject:

sigh

i really can use some help here. this ... thing is still not working.

mmm. at but it still says goging to inactive but iwconfig and ifconfig do seem it works. Also it tries two times to start eth0 one before and one after wlan0

THe driver is configured into the kernel, so that part seems alright.

Pinging the gateway give destination host unreachable. The wierd thing is it says:
From 192.168.0.101 ... detination host unreachable. That's it own Ip and I said to ping the gateway.

If I ping from a wireless winblows to the laptop wireless ip it host unreachable. To the laptop wired is destination host unreachable...

pappy_mcfae · Posted: Sat Mar 28, 2009 9:54 am Post subject:

Post /var/log/dmesg for all three machines.

Blessed be!
Pappy
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Gentoo-Ed · Posted: Sat Mar 28, 2009 10:04 am Post subject:

okay, that's going to be a long thread.
Laptop 1 (no network over wireless)

pappy_mcfae · Posted: Sat Mar 28, 2009 10:17 am Post subject:

Are you sure you don't have that backwards? I see the upper dmesg loading a wireless adapter. I don't see one loading in the second dmesg.

Blessed be!
Pappy
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Gentoo-Ed · Posted: Sat Mar 28, 2009 10:19 am Post subject:

Okay this is laptop 2. It's wireless is working and pinging accross wireless network no problem (even to windows client). It can not ping my "server" which is wired on 192.168.0.5.

Gentoo-Ed · Posted: Sat Mar 28, 2009 10:21 am Post subject:

for the server:
I can access it via ssh on laptop 1 (if it's wired) how can I open a file and copy it to firefox? At the moment I just enter /var/log/dmesg in the brouwser and copy past, but 192.168.0.5/var/log/dmesg doesn't work. There isn't firefox or X on the server yet because of the wireless issue with the laptop(s)

Gentoo-Ed · Posted: Sat Mar 28, 2009 10:26 am Post subject:

Gentoo-Ed · Posted: Sat Mar 28, 2009 1:34 pm Post subject:

Hey what's this. I found a difference

On the working laptop iwconfig shows these things different:
Tx-Power
Encryption Key
Security Mode

What to do to put them alike on the not working laptop??

Gentoo-Ed · Posted: Sat Mar 28, 2009 2:22 pm Post subject:

I notice that on the non working laptop the route shows loopback localhost...

The routing table is different then the other laptop and the command is way slower. How to make them alike??

Gentoo-Ed · Posted: Sat Mar 28, 2009 5:06 pm Post subject:

ohhh nooo

Now I don't connect to the AP anymore. I don't understand this and am entirly lost. All I now the AP is still working for other system still connect, nothing changed there.

Don't ask what I did for i've done tons of stuff today trying to get this thing working. I went through kernel settings, config files and you name it.

The card is still scanning though. I did mess with the hosts file too. But turning that back didn't help. I do see progress in the route speed though, but thats because the ... network isn't working.

Plese help again with this.

Gentoo-Ed · Posted: Sat Mar 28, 2009 5:50 pm Post subject:

ahhhh

nearly there. I turned the power of from the AP and then was back that it connected and couldn't do anything.

Then i went on with the routing table. I removed the route to the gateway and added. Then the command route was 10x faster. So I tried pingen, and hurray that worked. So is internet. Now to boot up and see what happens.

I hope wired isn't messing this then I need to solve that.

And now to ping 192.168.0.5 which is a wired pc...

[edit] arggg i shouldn't have booted....
now i can't do the trick anymore. What I did before it worked:
route del default
route add default gw 192.168.0.1

then seeing if it would stay I rebooted which I shouldn't have

pappy_mcfae · Posted: Sat Mar 28, 2009 7:15 pm Post subject:

Keep on plugging. You seem to be getting there.

Blessed be!
Pappy
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Gentoo-Ed · Posted: Sun Mar 29, 2009 7:25 am Post subject:

thanks for the boost pappy :-)

Okay this is what I've done this morning.
1. Switch over to static IP's (all interfaces so I don't have dhcp any more)
2. Configured all net and hosts files accordingly
3. stop eth0 and wlan0 on the laptop with no internet
4. started wlan0
5. removed the route and added it again (default gw)
At this point it didn't work yet
6. started eth0
Nothing pingable over both nics (using ping -I...)
7. removed the route and added it again (default gw)
Things pingable over both nics

Now for the big test, rebooting eth0 not connected and see what happens.
Okay after boot I need to mess with routes and stop start NICs to get it going.