[CentOS] CentOS4, KDE3.3 and 128 WEP

John Logsdon

j.logsdon at quantex-research.com
Mon May 23 13:58:01 UTC 2005


That seems a bit better so I can add the 128 bit WEP code.  But for some
reason I still can't activate it.  I get:

SIOCSIFFLAGS: Resource temporarily unavailable

which does not point too far.

I have checked that the atmel_cs module is installed (the card is a Belkin
F5D6020 rev 2).

I have tried an strace and it seems to be looking for a file libc.mo in
/usr/share/locale/[en.UTF-8|en.utf8|en]/LC_MESSAGES but there is one in
/usr/share/local/en_GB/LC_MESSAGES and pretty nearly every other locale
which are all in glibc-common.  

I guess this is because I switched from en_US to en_GB when I installed -
ie I unchecked US English.  I don't seem to recall having this problem 
with other machines although this is the first one that I have tried
to use wireless with...

I tried changing LANG to be en and I get the same result although the
strace now fails rather earlier.

So it seems at least that I should reinstall en=en_US but I am not
convinced that this will solve the problem. And where is it anyway?  I
can't see it in any of the CentOS4 rpms - I have been through all 1404 of
them.  It seems to be installed from somewhere when you set up CentOS4.  
Surely I don't have to reinstall?

Clues?

TIA

John
John Logsdon                               "Try to make things as simple
Quantex Research Ltd, Manchester UK         as possible but not simpler"
j.logsdon at quantex-research.com              a.einstein at relativity.org
+44(0)161 445 4951/G:+44(0)7717758675       www.quantex-research.com


On Mon, 23 May 2005, ryan wrote:

> system-config-network from the commandline brings up a GUI that you can
> enter in the WEP key for. You do not need to upgrade to KDE 3.4 for this.
> 
> >What do people recommend?
> 
> My recommendation is to use a different included GUI tool than kwifi
> (system-config-network). Instructions are here:
> http://www.centos.org/docs/4/html/rhel-sag-en-4/s1-network-config-wireless.html
> 
> You can also edit /etc/sysconfig/network-scripts/ifcfg-eth0 (or whatever
> your LAN card is) directly, but if you have never done this before, I'd say
> use the GUI.
> 
> 
> ----- Original Message ----- 
> From: "John Logsdon" <j.logsdon at quantex-research.com>
> To: "CentOS mailing list" <centos at centos.org>
> Sent: Monday, May 23, 2005 4:25 AM
> Subject: Re: [CentOS] CentOS4, KDE3.3 and 128 WEP
> 
> 
> > Folks
> >
> > My concern is not so much just how good or bad WEP is - and I agree that
> > it is much better to use ssh or a vpn tunnel.  Until 802.11i is fully
> > implemented, standard wireless is always going to be very easy to hack by
> > a sniffing geekster.
> >
> > The problem is that there are quite a lot other machines on the network
> > that have been configured with WEP128.  I don't use DHCP and I have MAC
> > filtering enabled so that is some protection.  Unconfiguring all those
> > machines will be a pain and as some of them are WinDroze XPoor, almost
> > certainly to fall over.
> >
> > OK - maybe the solution is to upgrade to KDE3.4.  There are comments about
> > 128 WEP in the 3.4 kdenetwork package.  And is KDE3.4 already stable
> > enough to be included?  What do people recommend?  Has anyone upgraded to
> > 3.4?
> >
> > Another issue is where is the gpg public key repository for CentOS4?
> >
> > So my problem remains.  At the moment I am using a regular wired
> > connection but that means that the garden is out of bounds and it is nice
> > and sunny today here in Manchester ... :-)
> >
> > Best wishes
> >
> > John
> >
> > John Logsdon                               "Try to make things as simple
> > Quantex Research Ltd, Manchester UK         as possible but not simpler"
> > j.logsdon at quantex-research.com              a.einstein at relativity.org
> > +44(0)161 445 4951/G:+44(0)7717758675       www.quantex-research.com
> >
> >
> > On Sun, 22 May 2005, Ryan wrote:
> >
> > > I disagree with this assessment.
> > >
> > > WPA-PSK is not much more secure than 128-bit WEP, since its passphrases
> > > vulnerable to common dictionary attacks.  Worse, linux has poor WPA
> > > support - not every wifi card supported by linux has WPA support.
> > >
> > > Also, many non-computer devices (wireless webcams, etc) only have WEP as
> > > an option.
> > >
> > > Use system-config-network , not kwifi, and you should be able to use WEP
> > > with no problem. Also, consider turning OFF DHCP, turning the AP off
> > > when you aren't using it, and enabling MAC filtering.
> > >
> > > If you are really concerned about security, consider using an SSH or VPN
> > > tunnel to encrypt data between laptops and a wired router/server.
> > >
> > > For some information on WPA-PSK weaknesses:
> > > http://wifinetnews.com/archives/002452.html
> > >
> > >
> > > system-config-network requires you enter in "0x" bbefore the key.
> > >
> > >
> > > Maciej Zenczykowski wrote:
> > > > You can skip wep128 or wep64 or any other wep for that matter,
> > > > currently a standard notebook with a supported wireless card running
> linux
> > > > can passively break through wep64/wep128 encryption within 10-30
> > > > minutes, switching to active mode can break through the encryption
> > > > within 3-5 minutes.  Simply put, encryption of the WEP kind is no
> longer
> > > > worth the bother.
> > > >
> > > > Just look around on google, he's a quote I found:
> > > >
> > > > Department: Here's a demo of the FBI, using commonly available and
> openly
> > > > documented hardware & software to crack WEP 128-bit security in three
> > > > minutes.
> > > >
> > > > http://www.tomsnetworking.com/Sections-article111-page1.php
> > > >
> > > > The needed utilites can be freely downloaded of the internet.
> > > >
> > > > Cheers,
> > > > MaZe.
> > > >
> > > > On Sun, 22 May 2005, John Logsdon wrote:
> > > >
> > > >> CentOS4 standard installation.
> > > >>
> > > >> I see that KwifiManager doesn't support 128 bit WEP which I need for
> > > >> other
> > > >> machines on the network, which is a bit of a blow - and rather
> surprising
> > > >> really as security should be quite a consideration on an enterprise
> level
> > > >> system (NB RH!).
> > > >>
> > > >> Is there a workaround?  An alternative way of configuring my Belkin
> > > >> F5D6020 ver 2 card?  eg a cvs download that I can get and copy via a
> > > >> stick?  Or how to do it manually?  I have tried regressing kdenetwork
> but
> > > >> that doesn't include kwifimanager at all.
> > > >>
> > > >> Ideas?
> > > >>
> > > >> TIA
> > > >>
> > > >> John
> > > >>
> > > >> John Logsdon                               "Try to make things as
> simple
> > > >> Quantex Research Ltd, Manchester UK         as possible but not
> simpler"
> > > >> j.logsdon at quantex-research.com              a.einstein at relativity.org
> > > >> +44(0)161 445 4951/G:+44(0)7717758675       www.quantex-research.com
> > > >>
> > > >>
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