Re: Adhoc Connection

On Wed, Mar 24, 2010 at 5:05 AM, Pavel Roskin <[email protected]> wrote:

> On Tue, 2010-03-23 at 12:36 +0200, Mohammad Abdelhadi wrote:
>
> > Thank you for the reply, I did mark the interface as unmanaged and I
> > confirmed that, then I repeated  the steps and I established two
> > interfaces using the same cell (checked by iwconfig) but still when I
> > use (ping) command to test the connection
> > (https://help.ubuntu.com/community/WifiDocs/Adhoc)   the result is
> > "Destination Host Unreachable"...  Any suggestions?
>
> It worked for me.
>
> That's how you can troubleshoot the problem:
>
> Make sure both interfaces are in ad-hoc mode, using the same channel and
> ESSID, and the cell number is indeed the same.
>
> Make sure both cards see each other in the scan results.  The MAC
> address shown by iwlist is the cell address of the other card.
>
> Use ifconfig to check that both cards have different IP addresses.  Use
> route to see if the remote IP address is routed via the wireless card.
>
> Run ping on one side and use tshark on both sides on the wireless
> interface to make see if the packets are going in both directions.
>
> Use iptables to see if there are any firewall rules that would prevent
> sending or receiving packets.
>
> Use a separate interface in monitor mode to see what is happening on the
> air.
>
> --
> Regards,
> Pavel Roskin
>


Hi Pavel,

After I marked the interface as unmanaged, I did the following on both
cards:

  wlanconfig ath0 destroy
  wlanconfig ath0 create wlandev wifi0 wlanmode adhoc
  iwconfig ath0 mode ad-hoc
  iwconfig ath0 essid 'name'
iwconfig ath0 channel 2
ifconfig ath0 up
dhclient ath0 (didn't work so I set up an IP address)
ifconfig ath0 'IP Address'

Did I forget something?

- then when I used (iwconfig) every thing was in its right place (essid,
channel, adhoc mode, cell number).
- when I used (iwlist) the two cards reported the information well, except
one of them couldn't give the essid ( it shows an empty essid; ESSID=' ')!!!
- Ping hasn't worked well yet.
- I used (iptables), and it seems that there is no firewall rules.

Any comments or further suggestions?

Thank you in advance..


-- 
Mohammad Jaser Abdelhadi
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Princess Sumaya University for Technology
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