Help: No internet connection

Mon Dec 14 19:46:50 UTC 2009

On Mon, Dec 14, 2009 at 8:40 PM, Simon Schneebeli
<simon.schneebeli at okko.org> wrote:
>
> On 12/14/2009 05:58 PM, R. G. Newbury wrote:
>>>>>
>>>>> On Sun, 2009-12-13 at 13:35 -0700, simon.schneebeli at okko.org wrote:
>>
>>>>>> At my brothers place I managed to connect to the internet with no
>>>>>> problem. All programmes worked, so I could add all the additional
>>>>>> programs I needed and install the latest updates.
>>
>>>> RPM: "Couldn't resolve host"
>>>>
>>>> To mention again: These messages appear immediately, not only after some
>>>> seconds like the server doesn't answer...
>>>
>>> What strikes me about that list is the ones that don't work are
>>> NetworkManager aware - I wonder if NetworkManager is telling them the
>>> connection is offline.
>>
>> Check that your router has IP address entries for your ISP's DNS
>> server(s).
>>
>> Check that you have not forgotten that you turned on access restrictions
>> on your router, and in particular that you have not limited the number of
>> DHCP addresses which the router can serve out, and that you are not over
>> that limit. (Been *there*...real hair-puller!). This is a likely possibility
>> given that you got things to work at your brother's house.. Maybe he has NO
>> security settings enabled??? Check that DHCP is turned ON.
>>
>> Check that system-config-network has IP address entries for your ISP's DNS
>> server(s) and that the gateway address in on the correct network (ie
>> 192.168.1.1 and not by mistake 192.168.0.1 etc.) You might want to try
>> settings a STATIC IP address to avoid DHCP contention errors. This will not
>> help if you have MAC address filtering turned ON, at the router.
>>
>> At a console enter:
>> 'service NetWorkManager stop'
>> 'service wpa_supplicant stop'
>> 'service ip6tables stop'
>>
>> With a WIRED connection ONLY:
>> 'service iptables restart'
>> 'service network restart'
>>
>> This should A) stop all the wireless services and things we don't want in
>> the way, and B) start ONLY the things we want to see.
>>
>> Then:
>> 'ifconfig eth0'  should show, in the second line something like:
>> "inet addr:192.168.1.99  Bcast:192.168.1.255  Mask:255.255.255.0"
>> If not, try 'ifup eth0' then 'ifconfig eth0' again.
>>
>> If you have an address, start with 'ping 192.168.1.1' (or whatever your
>> router's IP address is). That *should* work. Then try 'ping yahoo.com'. If
>> that works, then the problem(s) are internal to the configuration of the
>> programs you are running (ie proxy settings in Firefox)
>>
>> If you used a static IP, but cannot ping the router, then it is likely the
>> wiring or router setup. If you get no address reported, then the network
>> setup is wrong. (This is why a static address is useful for this case).
>>
>> If you get an IP address and can ping the router, but cannot ping
>> externally, then it is probably the router's DNS setup. When the wired
>> connection works, THEN you can try to set up wireless (and/or revert to a
>> DHCP IP scheme).
>>
>> And if you ARE going to set up wireless then I strongly recommend wicd (at
>> wicd.sourceforge.net) as a replacement for NetworkManager. It works at least
>> as well as NM, but has a MUCH more transparent setup and control structure
>> and can remember/act upon different wireless and wired connections, such as
>> you need for a laptop at work and at home. For this it helps if you use
>> 'static DHCP' where the router parses the MAC address and delivers an
>> address accordingly, triggered by the DHCP request from the laptop etc.
>>
>> Geoff
>
> Meanwhile, the wired connection works (was it because I manually added the
> DNS???, anyway it works), but the wired connection still doesn't work.
>
> Here's what I get with ifconfig.
>
> [root at sangam simon]# ifconfig eth0
> eth0      Link encap:Ethernet  HWaddr 00:1A:6B:CE:85:A7
>          inet addr:192.168.1.33  Bcast:192.168.1.255  Mask:255.255.255.0
>          inet6 addr: fe80::21a:6bff:fece:85a7/64 Scope:Link
>          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>          RX packets:7852 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:6432 errors:0 dropped:0 overruns:0 carrier:0
>          collisions:0 txqueuelen:100
>          RX bytes:6456499 (6.1 MiB)  TX bytes:815876 (796.7 KiB)
>          Memory:fe200000-fe220000
>
> And here is what I get with netstat -rn:
>
> [root at sangam simon]# netstat -rn
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags   MSS Window  irtt
> Iface
> 192.168.1.0     0.0.0.0         255.255.255.0   U         0 0          0
> eth0
> 192.168.1.0     0.0.0.0         255.255.255.0   U         0 0          0
> wlan0

This might be the problem. You have two networks at 192.168.1.0

Please stop one of the network cards to verify.

//HW

> 0.0.0.0         192.168.1.1     0.0.0.0         UG        0 0          0
> eth0
>
>
> As for wicd: I used that when working with Ubuntu and was always quite
> happy. So let's give it a try:
>
> I downloaded wicd from here: http://atrpms.net/dist/f12/wicd/
>
> It tells me the following:
> python-urwid is needed by package wicd-1.6.2.2-1.fc12.i686
> (/wicd-1.6.2.2-1.fc12.i686)
>
> So I get python-urwid from http://atrpms.net/dist/f12/python-urwid/
>
> Test Transaction Errors:   file
> /usr/lib/python2.6/site-packages/urwid-0.9.8.4-py2.6.egg-info from install
> of python-urwid-0.9.8.4-3.fc12.i686 conflicts with file from package
> urwid-0.9.8.4-6.1.i386
>  file /usr/lib/python2.6/site-packages/urwid/__init__.py from install of
> python-urwid-0.9.8.4-3.fc12.i686 conflicts with file from package
> urwid-0.9.8.4-6.1.i386
>  file /usr/lib/python2.6/site-packages/urwid/__init__.pyc from install of
> python-urwid-0.9.8.4-3.fc12.i686 conflicts with file from package
> urwid-0.9.8.4-6.1.i386
>  file /usr/lib/python2.6/site-packages/urwid/canvas.py from install of
> python-urwid-0.9.8.4-3.fc12.i686 conflicts with file from package
> urwid-0.9.8.4-6.1.i386
>  file /usr/lib/python2.6/site-packages/urwid/canvas.pyc from install of
> python-urwid-0.9.8.4-3.fc12.i686 conflicts with file from package
> urwid-0.9.8.4-6.1.i386
>  file /usr/lib/python2.6/site-packages/urwid/curses_display.py from install
> of python-urwid-0.9.8.4-3.fc12.i686 conflicts with file from package
> urwid-0.9.8.4-6.1.i386
>  file...
>
> My, my. What a headache. These thing make me feel kind of lost...
>
> Simon
>
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