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Date:  Sun, 10 Jul 2005 18:55:00 -0400
Sender: os2-wireless_users-owner <os2-wireless_users-owner@2rosenthals.com>
Reply-To: os2-wireless_users@2rosenthals.com
From:  Lewis G Rosenthal <os2-wireless_users@2rosenthals.com>
To:  os2-wireless_users@2rosenthals.com
Subject: [OS2Wireless] OS/2 Developers Workshop and Vodafone Wi-Fi at the hotel

I hate to reply to my own post, but a quick follow-up is in order:

This issue may not be related to OS/2's lack of IPv6 functionality. 
Running a quick search on Bugzilla, I came up with no less than 200 hits 
for "network.dns.disableIPv6" and a good many of those hits dealt with 
slow lookups and timeouts - even from platforms which support IPv6 out 
of the box.

So, I suppose it would be more appropriate to consider this as just a 
performance tip to speed up DNS lookups and perhaps correct DNS timeouts.

On 07/10/2005 06:37 pm, Lewis G Rosenthal thus wrote :
> First, for everyone on this list who attended and/or presented at the 
> Developer's Workshop, and especially to you, Robert, my heartfelt 
> thanks and congratulations for a thoroughly enjoyable weekend. I had a 
> blast...
>
> Next, and more on topic here (though for everyone's thoughts, events 
> like the Developer's Workshop and the various Warpstocks - Warpstock 
> Czech Republic is coming up soon, BTW; see 
> http://felis.kky.vslib.cz/CZECH_WARPSTOCK_2005/ for details! - won't 
> be around forever without support for the community; whether it be the 
> developer community, as we had this weekend, or the user and vendor 
> communities whom we host at Warpstock...show your support: 
> http://www.warpstock.net/), I had a heck of a time connecting to the 
> hotel Wi-Fi, and was about to blame OS/2 (I was even having some 
> difficulty at the University this afternoon, and thought it was a 
> low-level DHCP issue), when I finally hit upon the problem: IPv6 
> support is enabled by default in Mozilla and Firefox.
>
> I picked up on a couple links when I finally figured out what was 
> going on and got myself connected:
>
> http://forums.techguy.org/history/t-354959.html
> http://cruftbox.com/blog/archives/001096.html
> http://www.linuxquestions.org/questions/archive/30/2004/10/4/236026
>
> In brief:
>
> In prefs.js (recent builds of Mozilla and Firefox), you will find the 
> following preference set to false by default:
>
> network.dns.disableIPv6
>
> Normally, this should cause us no trouble on OS/2, as we do not 
> support IPv6. However, while I was able to do simple DNS lookups from 
> the command line, using nslookup and dig connected to the default 
> Vodafone (that's who supplies the hotspot here at the Mercure Newa 
> Dresden, and it runs on a Cisco backbone which is apparently IPv6 
> capable - no wonder the addressing looked odd from IPv4 standards) 
> server and received fairly quick results, attempting to browse pages - 
> even within the captive portal - proved problematic. POP3 and SMTP 
> were all but impossible.
>
> In desperation, I changed my resolv2 to point to a couple root servers 
> on the net, and restarted Mozilla. Immediately, I was able to browse, 
> and download and send outgoing mail. A little googling, a change of 
> the prefs.js, a browser restart, and finally an interface 
> (re)configure from XWLAN (released and renewed the DHCP params), and I 
> was right on line again - using the default Vodafone DNS address.
>
> So, I guess the moral of the story is that if you're running OS/2, you 
> should probably ensure that this setting is toggled to true to disable 
> IPv6 DNS in either browser, particularly if you may find yourself 
> going from hotspot to hotspot.
>

-- 
Lewis
------------------------------------------------------------
Lewis G Rosenthal, CNA, CLE
Rosenthal & Rosenthal, LLC
Accountants / Network Consultants
  New York / Northern Virginia           www.2rosenthals.com
eComStation Consultants                  www.ecomstation.com
Novell Users International        www.novell.com/linux/truth

Warpstock 2005 - Hershey, 
Pennsylvania, October 6-9, 2005            www.warpstock.org
------------------------------------------------------------
 

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