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Network configuration problem Mythbuntu 10.10

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  Network configuration problem Mythbuntu 10.10 Richard Evans <rp.evans.nospam@tiscali.co.uk> - 2011-05-03 00:36 +0100
    Re: Network configuration problem Mythbuntu 10.10 Bit Twister <BitTwister@mouse-potato.com> - 2011-05-03 03:17 +0000
    Re: Network configuration problem Mythbuntu 10.10 Richard Kettlewell <rjk@greenend.org.uk> - 2011-05-03 14:57 +0100
    Re: Network configuration problem Mythbuntu 10.10 J G Miller <miller@yoyo.ORG> - 2011-05-03 15:25 +0000
      Re: Network configuration problem Mythbuntu 10.10 Richard Evans <rp.evans.nospam@tiscali.co.uk> - 2011-05-05 15:13 +0100
        Re: Network configuration problem Mythbuntu 10.10 Michal Jaegermann <michal@gortel.phys.ualberta.ca> - 2011-05-06 09:26 +0000
          Re: Network configuration problem Mythbuntu 10.10 Richard Evans <rp.evans.nospam@tiscali.co.uk> - 2011-05-06 15:12 +0100
      Re: Network configuration problem Mythbuntu 10.10 Richard Evans <rp.evans.nospam@tiscali.co.uk> - 2011-05-05 15:21 +0100
        Re: Network configuration problem Mythbuntu 10.10 Richard Kettlewell <rjk@greenend.org.uk> - 2011-05-05 16:36 +0100
          Re: Network configuration problem Mythbuntu 10.10 Richard Evans <rp.evans.nospam@tiscali.co.uk> - 2011-05-05 17:41 +0100
            Re: Network configuration problem Mythbuntu 10.10 Richard Kettlewell <rjk@greenend.org.uk> - 2011-05-05 17:50 +0100
              Re: Network configuration problem Mythbuntu 10.10 Richard Evans <rp.evans.nospam@tiscali.co.uk> - 2011-05-05 18:04 +0100
              Re: Network configuration problem Mythbuntu 10.10 Richard Evans <rp.evans.nospam@tiscali.co.uk> - 2011-05-05 18:17 +0100
            Re: Network configuration problem Mythbuntu 10.10 J G Miller <miller@yoyo.ORG> - 2011-05-05 21:37 +0000
              Re: Network configuration problem Mythbuntu 10.10 Richard Evans <rp.evans.nospam@tiscali.co.uk> - 2011-05-06 00:53 +0100
                Re: Network configuration problem Mythbuntu 10.10 J G Miller <miller@yoyo.ORG> - 2011-05-06 00:19 +0000
                  Re: Network configuration problem Mythbuntu 10.10 Richard Evans <rp.evans.nospam@tiscali.co.uk> - 2011-05-06 02:59 +0100
                    Re: Network configuration problem Mythbuntu 10.10 J G Miller <miller@yoyo.ORG> - 2011-05-06 16:22 +0000
                      Re: Network configuration problem Mythbuntu 10.10 Richard Evans <rp.evans.nospam@tiscali.co.uk> - 2011-05-06 18:38 +0100
                        A couple of corections. Richard Evans <rp.evans.nospam@tiscali.co.uk> - 2011-05-06 20:02 +0100
                        Re: Network configuration problem Mythbuntu 10.10 Michal Jaegermann <michal@gortel.phys.ualberta.ca> - 2011-05-08 22:12 +0000
                Re: Network configuration problem Mythbuntu 10.10 "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2011-05-05 20:39 -0400
                  Re: Network configuration problem Mythbuntu 10.10 Richard Evans <rp.evans.nospam@tiscali.co.uk> - 2011-05-06 03:05 +0100
      Re: Network configuration problem Mythbuntu 10.10 Richard Evans <rp.evans.nospam@tiscali.co.uk> - 2011-05-05 15:24 +0100
      Re: Network configuration problem Mythbuntu 10.10 Richard Evans <rp.evans.nospam@tiscali.co.uk> - 2011-05-05 16:08 +0100
        Re: Network configuration problem Mythbuntu 10.10 Richard Evans <rp.evans.nospam@tiscali.co.uk> - 2011-05-05 16:30 +0100
          Re: Network configuration problem Mythbuntu 10.10 Richard Evans <rp.evans.nospam@tiscali.co.uk> - 2011-05-05 16:55 +0100
    Re: Network configuration problem Mythbuntu 10.10 Richard Evans <rp.evans.nospam@tiscali.co.uk> - 2011-05-05 14:59 +0100
      Re: Network configuration problem Mythbuntu 10.10 J G Miller <miller@yoyo.ORG> - 2011-05-05 15:39 +0000
        Re: Network configuration problem Mythbuntu 10.10 Richard Evans <rp.evans.nospam@tiscali.co.uk> - 2011-05-05 17:51 +0100
          Re: Network configuration problem Mythbuntu 10.10 J G Miller <miller@yoyo.ORG> - 2011-05-05 21:43 +0000
            Re: Network configuration problem Mythbuntu 10.10 Richard Evans <rp.evans.nospam@tiscali.co.uk> - 2011-05-06 00:58 +0100
              Re: Network configuration problem Mythbuntu 10.10 J G Miller <miller@yoyo.ORG> - 2011-05-06 00:24 +0000
                Re: Network configuration problem Mythbuntu 10.10 Richard Evans <rp.evans.nospam@tiscali.co.uk> - 2011-05-06 01:51 +0100

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#340

Richard Evans <rp.evans.nospam@tiscali.co.uk> wrote:
> J G Miller wrote:
>> May I make a suggestion?  You should sit down and make a list of
>> all your network devices and MAC addresses and put these into
>> /etc/hosts and /etc/ethers.
> 
> Good suggestion, however I'm afraid I'm not good at keeping written 
> records when I'm at home, I would probably not get around to keeping it 
> up to data.

'man nmap' then.

Description : Nmap is a utility for network exploration or security auditing.  It
            : supports ping scanning (determine which hosts are up), many port
            : scanning techniques (determine what services the hosts are
            : offering), and TCP/IP fingerprinting (remote host operating system
            : identification). Nmap also offers flexible target and port
            : specification, decoy scanning, determination of TCP sequence
            : predictability characteristics, reverse-identd scanning, and more.

There exists a graphical frontend to nmap, a.k.a. zenmap.

   Michal

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#316

On Thu, 05 May 2011 19:53:18 -0400, Richard Evans <rp.evans.nospam@tiscali.co.uk> wrote:

> The problem does seem to be associated to something on my server (my
> 64bit Linux box). I tried entering "ping pop3.tiscali.co.uk" on my 32
> bit machine, and at first it didn't work. Then I unplugged the network
> cable from my server and the ping immediately started working.

Any chance both network cards have been set to use the same mac address?

Regards, Dave Hodgins

-- 
Change nomail.afraid.org to ody.ca to reply by email.
(nomail.afraid.org has been set up specifically for
use in usenet. Feel free to use it yourself.)

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#319

David W. Hodgins wrote:
> On Thu, 05 May 2011 19:53:18 -0400, Richard Evans 
> <rp.evans.nospam@tiscali.co.uk> wrote:
> 
>> The problem does seem to be associated to something on my server (my
>> 64bit Linux box). I tried entering "ping pop3.tiscali.co.uk" on my 32
>> bit machine, and at first it didn't work. Then I unplugged the network
>> cable from my server and the ping immediately started working.
> 
> Any chance both network cards have been set to use the same mac address?
> 
> Regards, Dave Hodgins
> 
Thanks, but I think I just found the problem.
An old Cable router that I now use as a network switch, and when I 
installed my new Netgear router about 6 months ago, I stupidly set it to 
the same address as that old cable router. So it's surprising that I 
haven't noticed any problems before.

I've now fixed that problem, and I'm going to see if my 32bit Linux box 
now works properly, (but 1st I have to get it up and running again, as 
my latest attempt at configuring the tV-Output didn't work).

Thanks.

Richard.

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#299

Right. Just to confuse the issue even more, I just tried route-n on my 
64 bit machine, and got the same result as with my 32 bit machine. So 
perhaps this strange output is normal?? as this machine doesn't seem to 
have any networking issues.

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#300

OK I just tried something different, which completely changes the problem.

My 32 bit machine was connected via an 8 port switch. I suddenly thought 
perhaps there might be something strange going on with that switch. So 
I've temporarily connected a Cat5 directly from my 32 bit machine to my 
router, and now the networking works perfectly.

So it looks like there was no problem with the network setup on my 32bit 
box, but a problem with my network switch. This is a bit strange, and I 
may have to try and solve it at some point, but at least now I can 
connect my 32bit box to the internet, and apt-get should work now.

Thanks.

Richard.

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#301

I spoke too soon, it has suddenly decided to stop working again Grrrrrr.....

I used apt-get to install telnetd, but wasn't sure whether it had 
installed properly, so I restarted the whole system, but after a system 
restart the system then failed to see the internet. This problem is so 
bizare, and it's driving me up the wall. Grrrr....

Richard.


Richard Evans wrote:
> OK I just tried something different, which completely changes the problem.
> 
> My 32 bit machine was connected via an 8 port switch. I suddenly thought 
> perhaps there might be something strange going on with that switch. So 
> I've temporarily connected a Cat5 directly from my 32 bit machine to my 
> router, and now the networking works perfectly.
> 
> So it looks like there was no problem with the network setup on my 32bit 
> box, but a problem with my network switch. This is a bit strange, and I 
> may have to try and solve it at some point, but at least now I can 
> connect my 32bit box to the internet, and apt-get should work now.
> 
> Thanks.
> 
> Richard.

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#304

Right, perhaps I'm getting somewhere now.

I disconnected everything from my router except for the 32bit linux box, 
and my laptop (which connects wirelessly). Then I restarted everything, 
and it now seems to be working properly. So perhaps the whole problem 
was something to do with my router not being able to handle everything 
that was connecting to it. I'm thinking perhaps it might be the torrent 
client on my 64bit linux box that might have been creating the problem. 
Not sure exactly why my 32bit box was the only machine affected, perhaps 
because it's just not quite as powerful as the other machines on my network.

If I'm right about this, then I'll probably just have to shut everything 
else down whenever I need to update my 32bit box via the internet.


Now hopefully I can get on with figuring out my TV-Out configuration. 
I've now managed to log into my 32bit box from my laptop using Winscp. 
The reason for wanting to do this is that when I try to amend the 
xorg.conf on my 32bit box, I tend to end up with a blank screen, so I 
needed another way to access it, without having to crash out by 
switching it off. Right now to try and configure the TV-Output.

Thanks.

Richard.

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#296

Thanks everybody for all your comments.

However nobody seems to have come up with anything I haven't already 
tried. I was hoping I would hear about some other configuration options 
hiding somewhere, which I didn't know about.

At the moment I'm coming to the conclusion that this Linux box is just a 
lemon, it's been giving me problem after problem, and this networking 
problem just seems to completely defy all logic. I think I'm going to 
try Plan B instead. I've ordered a 2nd hand XBox and I'm going to try 
and implement my front end on that instead.

Thanks.

Richard.

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#303

On Thursday, May 5th, 2011 14:59:26 +0100, Richard Evans complained:

> However nobody seems to have come up with anything I haven't already
> tried. 

But you did not report the results.

Do you think we are mind readers or have a crystal ball?

So are you now saying you no longer want help with this problem?

Because there are so many permutations, this sort of problem
has to be solved methodically, step by step, something you
seem unwilling to do with any of your requests for assistance.

Apparently yet another case of asking for help, then throwing
in the towel when you do not get an immediate fix ...

Seeing as you claim you can ping your router from the 32bit,
my next suggestion would be to try traceroute with an external
IP address to see if that indicates where the link in the
chain is failing.

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#307

J G Miller wrote:
> On Thursday, May 5th, 2011 14:59:26 +0100, Richard Evans complained:
> 
>> However nobody seems to have come up with anything I haven't already
>> tried. 
> 
> But you did not report the results.
> 
> Do you think we are mind readers or have a crystal ball?
> 
> So are you now saying you no longer want help with this problem?
> 
> Because there are so many permutations, this sort of problem
> has to be solved methodically, step by step, something you
> seem unwilling to do with any of your requests for assistance.
> 
> Apparently yet another case of asking for help, then throwing
> in the towel when you do not get an immediate fix ...
> 
> Seeing as you claim you can ping your router from the 32bit,
> my next suggestion would be to try traceroute with an external
> IP address to see if that indicates where the link in the
> chain is failing.

OK Ignore that comment, call it a moment of frustration, as I had 
already tried all sorts of combinations including every conceivable way 
of pinging things.

I wouldn't exactly say I'm looking for a quick fix, as this MythFrontEnd 
has been giving me grief for months now, so I do get frustrated with it 
from time to time. (or quite a lot actually). I'd love to be able to 
just hand it all over to a Linux expert, but haven't been able to find one.

Actually I think I've more or less solved the networking issue now. I 
think something else keeps overloading my router, probably the torrent 
client on my other machine.

Next, back to the frustration of trying to figure out the TV-Output 
configuration. That is something I seem to have spent hours trying to 
figure out, but still don't have the 1st clue what I'm doing. Which is 
extremely frustrating, but I suppose I have no choice other than to keep 
trying.

Thanks.

Richard.

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#311

On Thu, 05 May 2011 17:51:17 +0100, Richard Evans wrote:

> Actually I think I've more or less solved the networking issue now. I
> think something else keeps overloading my router, probably the torrent
> client on my other machine.

Maybe, but have you tried using traceroute?  Traceroute should reveal
where the connection goes dead.

Using a real hostname instead of an IP address and deleting the starting
entries to protect the guilty ..


traceroute mx02.eternal-september.org
traceroute to mx02.eternal-september.org (188.40.43.213), 30 hops max, 60 byte packets
 
 3  * * *
 4  * * *
 5  decix2-gw.hetzner.de (80.81.193.164)  82.984 ms  87.084 ms  89.945 ms
 6  hos-bb1.juniper2.fs.hetzner.de (213.239.240.243)  108.024 ms hos-bb1.juniper1.fs.hetzner.de (213.239.240.242)  76.811 ms  38.044 ms
 7  hos-tr1.ex3k2.rz10.hetzner.de (213.239.227.131)  44.765 ms  45.714 ms hos-tr4.ex3k2.rz10.hetzner.de (213.239.227.227)  46.292 ms
 8  mx02.eternal-september.org (188.40.43.213)  55.330 ms  56.392 ms  57.113 ms


> Next, back to the frustration of trying to figure out the TV-Output
> configuration. That is something I seem to have spent hours trying to
> figure out, but still don't have the 1st clue what I'm doing.

You need a small xorg.conf so that you can see the wood and not get
distracted by all the tree and then add the appropriate resolution and
maybe a modeline if necessary.

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#313

J G Miller wrote:
> On Thu, 05 May 2011 17:51:17 +0100, Richard Evans wrote:
> 
>> Actually I think I've more or less solved the networking issue now. I
>> think something else keeps overloading my router, probably the torrent
>> client on my other machine.
> 
> Maybe, but have you tried using traceroute?  Traceroute should reveal
> where the connection goes dead.
> 
> Using a real hostname instead of an IP address and deleting the starting
> entries to protect the guilty ..
> 
> 
> traceroute mx02.eternal-september.org
> traceroute to mx02.eternal-september.org (188.40.43.213), 30 hops max, 60 byte packets
>  
>  3  * * *
>  4  * * *
>  5  decix2-gw.hetzner.de (80.81.193.164)  82.984 ms  87.084 ms  89.945 ms
>  6  hos-bb1.juniper2.fs.hetzner.de (213.239.240.243)  108.024 ms hos-bb1.juniper1.fs.hetzner.de (213.239.240.242)  76.811 ms  38.044 ms
>  7  hos-tr1.ex3k2.rz10.hetzner.de (213.239.227.131)  44.765 ms  45.714 ms hos-tr4.ex3k2.rz10.hetzner.de (213.239.227.227)  46.292 ms
>  8  mx02.eternal-september.org (188.40.43.213)  55.330 ms  56.392 ms  57.113 ms

I'll have a play with that at some point.
So would I be able to type in traceroute pop3.tiscali.co.uk, instead of 
using ping?

> 
> 
>> Next, back to the frustration of trying to figure out the TV-Output
>> configuration. That is something I seem to have spent hours trying to
>> figure out, but still don't have the 1st clue what I'm doing.
> 
> You need a small xorg.conf so that you can see the wood and not get
> distracted by all the tree and then add the appropriate resolution and
> maybe a modeline if necessary.

I'm thinking I might try copying in the configuration file near the 
bottom of this web page,
http://www.openchrome.org/trac/wiki/Configuration
but replacing S-Video with YCbCr


Section "Monitor"
         Identifier   "Monitor0"
         HorizSync    30 - 50
         VertRefresh  50.0 - 50.0
EndSection
Section "Device"
         Identifier  "Card0"
         Driver      "openchrome"
         Option      "ActiveDevice" "TV"
         Option      "TVType" "PAL"
         Option      "TVOutput" "S-Video"
EndSection
Section "Screen"
         Identifier "Screen0"
         Device     "Card0"
         Monitor    "Monitor0"
         DefaultDepth     24
         SubSection "Display"
                 Viewport   0 0
                 Modes    "720x576" "720x576Noscale"
         EndSubSection
EndSection

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#315

On Fri, 06 May 2011 00:58:47 +0100, Richard Evans wrote:


> So would I be able to type in traceroute pop3.tiscali.co.uk,
> instead of using ping?

Exactly, although you may have to do apt-get install traceroute 
beforehand.

> I'm thinking I might try copying in the configuration file near the
> bottom of this web page,
> http://www.openchrome.org/trac/wiki/Configuration but replacing S-Video
> with YCbCr

Well you must ensure that you use the correct horizonal synchronization
and vertical refresh rate value as well ..

Back in the days of CRT monitors people who used out of specification
values sometimes caused their monitor to catch fire.

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#317

J G Miller wrote:
> On Fri, 06 May 2011 00:58:47 +0100, Richard Evans wrote:
> 
> 
>> So would I be able to type in traceroute pop3.tiscali.co.uk,
>> instead of using ping?
> 
> Exactly, although you may have to do apt-get install traceroute 
> beforehand.
> 
>> I'm thinking I might try copying in the configuration file near the
>> bottom of this web page,
>> http://www.openchrome.org/trac/wiki/Configuration but replacing S-Video
>> with YCbCr
> 
> Well you must ensure that you use the correct horizonal synchronization
> and vertical refresh rate value as well ..

I just tried that configuration, and rebooted, and now I have just a 
text screen asking me to log in. It would seem that the graphical 
environment has failed to load.

Could this because I have the wrong horizontal synchronisation and 
vertical refresh rate values. And if so how do I figure out what values 
I should be using?

> 
> Back in the days of CRT monitors people who used out of specification
> values sometimes caused their monitor to catch fire.

My VGA monitor just comes up with a message saying signal out of range, 
or something similar.

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