Network Doesn't Work (details inside!)

Message

haz3l · Post by **haz3l** » Tue Sep 20, 2005 3:26 am

Sorry for the stupid thread title but I couldn't paraphrase this...

So I've been having some network issues.. specifically I haven't been able to get my server to ping my workstation.

"WELL YOUR CONFIG IS WRONG!" you say! At first it was, but I fixed it. net.eth0 will start cleanly and ifconfig confirms that eth0 looks alright.
Following my config fix, I still had the same problem, when I would ping my workstation I would receive "Destination Host Unreachable". So, after exhausting every other idea, I replaced the network card (and got the proper module to accomodate the new card.)

I can "ping -b 192.168.1.255" and pick up the broadcast packets on my workstation and I do not receive "Destination Host Unreachable".

Dmesg doesn't reveal anything disconcerting.

I have no idea what to do or where to look next. Thanks.

commonloon · Post by **commonloon** » Tue Sep 20, 2005 4:56 am

Not much to go on... need more info.

1. What does your routing table look like? Try: route -n (-n because I assume DNS is not working).

2. Please include your ifconfig.

3. What do lscpi and lsmod show? ...to show the hardware you have and what modules are loaded... can check that they match and you don't have any sometimes problematic modules like ethernet over ieee1394.

4. What is the network configuration? I assume its a 192.168.1.0 network from your post.

5. All the lights on the interfaces

Given all that it should be easy... maybe.

haz3l · Post by **haz3l** » Tue Sep 20, 2005 6:21 am

Thanks for the help.

I got my father, an expert linux user, to look over my system to do a more thorough check. He couldn't identify any problems or find anything apparently wrong.

I ask that you assume the following-- and if you don't trust me, I don't blame you. I, however, firmly believe:

1. The routing table prints out what it should.
2. Ifconfig looks how it should.
3. The correct modules are being used.
4. My network config is 192.168.1.0

5. Lights on interfaces? The activity light on the switch flashes when I broadcast, but not when I ping my own network IP.
6. All hardware involved is functioning correctly.

I'm not trying to be stingy with information, I just don't see this as an easily fixable problem that originates from something obvious-- pulling all the information from the other box would require me to hand copy it.

This is a good excuse to give Debian a try.

expat_iain · Post by **expat_iain** » Tue Sep 20, 2005 7:25 am

Post the information asked for if you want help - our psychic has not returned from summer hols.

Regs.

Iain.

haz3l · Post by **haz3l** » Tue Sep 20, 2005 1:35 pm

expat_iain wrote:Post the information asked for if you want help - our psychic has not returned from summer hols.

Regs.

Iain.

If you can't help based on the information provided, I don't think you'll be able to help. Thanks anyway though.

commonloon · Post by **commonloon** » Tue Sep 20, 2005 1:35 pm

You don't need to hand type it,just put a floppy or usb key drive in there and (as root otherwise some stuff may not be in your path):

Code: Select all

id > /tmp/output
route -n >> /tmp/output
ifconfig >> /tmp/output
lspci >> /tmp/output
lsmod >> /tmp/output
cat /etc/conf.d/net | egrep -v '^#' >> /tmp/output 
cp /tmp/output /mnt/{floppy,keychain} # or where ever the floppy or keychain is mounted.

In fact, in general typing stuff is prone to error. We tend to "Think" all things are right until we see some obvious typo, that a 2nd pair of eyes might easily find.

haz3l · Post by **haz3l** » Tue Sep 20, 2005 1:42 pm

I'm saying that those things are correctly set up. I've verified them, someone else has verified them. The output of the programs is not only correct by my eye but also matches that of the boot CD (which has working inet). There is no valuable information in those files, sorry. If you don't want to help because you don't have the provided informatione or disagree, I don't blame you.

I'm waiting for someone to say, "IVE SEEN THAT GENTOO GHOST BEFORE!!!!"

adaptr · Post by **adaptr** » Tue Sep 20, 2005 2:25 pm

haz3l wrote:I'm saying that those things are correctly set up.

But they're obviously not, since your network isn't working.

haz3l wrote: I've verified them, someone else has verified them.

Then ask someone else for help; if you want help here, supply the information people request.

haz3l wrote: The output of the programs is not only correct by my eye but also matches that of the boot CD (which has working inet). There is no valuable information in those files, sorry.

Well, then there is preciously little anybody can do to help you.

haz3l wrote: If you don't want to help because you don't have the provided informatione

You keep saying that; try to grok that we can't help you - unless you provide said information.
Personally, I wouldn't even try.

haz3l · Post by **haz3l** » Tue Sep 20, 2005 8:49 pm

I've repeatedly acknowledged that you probably can't help me and probably shouldn't try. I'm not sure how I can make that more clear.

think4urs11 · Post by **think4urs11** » Tue Sep 20, 2005 10:19 pm

commonloon wrote:

Code: Select all

id > /tmp/output
route -n >> /tmp/output
ifconfig >> /tmp/output
lspci >> /tmp/output
lsmod >> /tmp/output
cat /etc/conf.d/net | egrep -v '^#' >> /tmp/output 
cp /tmp/output /mnt/{floppy,keychain} # or where ever the floppy or keychain is mounted.

Do as the man stated already.
As long as YOU don't want to give out ANY kind of informations besides 'doesn't work, looks ok' NOBODY can and will help you - at least my voodoo master is on vacation this month...

additional to the above the output of either mii-diag or ethertool might be useful.

haz3l wrote:If you can't help based on the information provided, I don't think you'll be able to help.

If you don't provide valueable/sane informations to someone who is trying to help you you probably don't want to have any helping hands at all.

The infos you gave are very incomplete - e.g. what about your network mask, what about your speed settings on the NIC, what about the duplex settings, what about a (probably) installed and active firewall on either of the systems, what about .....
You're judging on personal opinion whether or not your problem can be found by have others having a look at them or not - try to be objective and open minded. We're not talking about sensitive military grade informations here...

haz3l wrote:This is a good excuse to give Debian a try

Well it's your choice - new base system -> new/other problems

adaptr · Post by **adaptr** » Wed Sep 21, 2005 11:48 am

haz3l wrote:I've repeatedly acknowledged that you probably can't help me and probably shouldn't try. I'm not sure how I can make that more clear.

You can't, because it is obvious that apart from not having a brain, you don't have eyes either.
You haven't said a word to me before this reply, so what are you going on about ?

Are you psychotic by any chance ?
Do you think that everybody that replies in this thread - and every single reply I have seen so far is still indicating they want to help, amazing as that may seem - is out to get your "sensitive information" ?

It all started to go downhill when you stated:

My father - an expert Linux user

Who is qualified to make that judgement - you ?
I rather doubt it.
If your "expert Linux user" can't solve a simple network problem such as this then that accolade is certainly not deserved.

Furthermore, you babble onwards about "if you don't believe blah blah but I believe I am right"...
With all due respect - what you believe doesn't enter into it, and I couldn't care less.

This is a technical forum, discussing technical issues, none of which are subject to belief - of any sort.
You either get it, or you don't, and the information is either correct, or it isna.

Yours isna - in more ways than one.

haz3l · Post by **haz3l** » Wed Sep 21, 2005 1:56 pm

adaptr wrote: You can't, because it is obvious that apart from not having a brain, you don't have eyes either.

OH GOD!!1

WHY DIDNT SOMEONE SAY SOMETHING?!

YOU'LL NEVER SEE MY CONFIGURATION FILES>!!

jamapii · Post by **jamapii** » Wed Sep 21, 2005 6:55 pm

iptables -L

and if necessary

iptables -F

Once I had the same problem as you, and it turned out I had myself locked out with some filter rules (ping worked, nothing else).

CoolBeer · Post by **CoolBeer** » Wed Sep 21, 2005 7:53 pm

Uhm.... this probably is me misunderstanding something...

4. My network config is 192.168.1.0

is that your ip? if it is, try something other than 192.168.1.0 and 192.168.1.255.
I'm under the impression that .0 is not a valid ip... but I might be mistaken...
Sorry if I misunderstood though

commonloon · Post by **commonloon** » Thu Sep 22, 2005 1:20 am

Guys... this guy is just trolling.... don't waste your time.