[CS-FSLUG] Windows 7 conectability issues.

[Tim Young]

Hi,
One "standard" wireless thing I have seen is to disable the wireless 
adapter and re-enable it.  I have seen many Windows 7 wireless 
adapters that are fixed with this one.

I would second the "disable IPv6" comment.  Windows 7 prefers IPv6 
where it thinks it can get away with it.

If that fails, I would try disabling the windows (or antivirus) 
firewall temporarily to see if that is the issue.

If that fails, download a copy of wireshark (either by using a wired 
connection or on a different computer and transferring it over). 
Wireshark is like tcpdump on Linux.  Connect via wireless, run 
wireshark doing a "capture" and do a number of DNS queries.  You can 
probably use one of these filters:
   udp.port==53
   tcp.port==53
   ip.host=[his IP address here]

For example, if his IP is 192.168.0.23
   ip.host=192.168.0.23

Most DNS uses udp, but some uses tcp.  If you find that it is using 
tcp instead of UDP, that will tell us something.  If you do not see 
anything going out, that will tell us something.  If you see it going 
out on UDP, but nothing coming back (if it goes from his IP out, but 
we do not see any responses from the name-server) that tells us 
something.  Also, look at the IP address of the name-server to make 
sure it is actually using the name-server you expect it to be using.

     - Tim

Ps. I assume you will be seeing my dad down there in Mexico in a few 
days.  If so, greet him for me.  I will be down in Mitla, Oaxaca from 
Sun - Fri teaching Linux security to some folks.  Looking forward to 
a brief visit to Mexico.  It has been a number of years.


On 2/1/2013 11:15 AM, davidm at hisfeet.net wrote:
> We are now in Mexico connected to the TELMEX system, which is the landline
> 'almost monopoly' system. Got everything in our house working just fine,
> even my wifes winxp laptop on wifi.  But the pastor here has a win7
> laptop.  Strange (to me ) thing.
>
> It connects by wifi to the modem, nd can png the modem, and other
> computers (ours) connected to the modem either by cable, or wifi. It can
> even ping internet sites by ip number, but not by name.  Will even show
> some of the sites when I put the ip number in the URL line of the browser.
> It seems that it won't connect to any Name Server.
>
> I managed to change the DNS settings in the win7 machine, but still won't
> connect to any wan by name. I also changed the DNS in the modem, but no
> change.
>
> Any ideas what could keep it from connecting?  Oh, by the way, t works
> fine when connected by cable to the modem.
>
> DavidM
>
>
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