Re: Cannot access IPv6 sites

I had no trouble connecting to "Python programming language - official  
website"
http://www.python.org/ using Opera 10.01 beta 1 and Opera build 1844 with
Windows Vista.     .....  Larry

On Thu, 29 Oct 2009 11:35:32 -0700, Thorsten Kampe  
<[email protected]> wrote:

> Hello,
>
> I cannot reach IPv6 websites with Opera build 1848 (running on Windows
> 7) - while Firefox 3.5.4 and Internet Explorer 8 on the same machine
> have no problem. I'm having this problem probably for some months.
>
> One example website is http://www.python.org.
>
> nslookup gives:
>
> Name:    www.python.org
> Addresses:  2001:888:2000:d::a2
>           82.94.164.162
>
> I did a network trace and it shows six packets of this kind:
>
> [Opera]
> 2002:952c:8881::952c:8881 2001:888:2000:d::a2 TCP 51957 > 80 [SYN]
>
> Interestingly the IPv6 address belongs not to my LAN adapter but to my
> "Tunnel adapter 6TO4 Adapter". None of these connection attempts is ever
> answered.
>
> These are the first packets of the (successful) connection in Firefox
> and Internet Explorer:
>
> [IE and FF]
> <my IPv4 address> 82.94.164.162     TCP 51861 > http [SYN]
> 82.94.164.162     <my IPv4 address> TCP http > 51861 [SYN, ACK]
> <my IPv4 address> 82.94.164.162     TCP 51861 > http [ACK]
>
> So it seems that Internet Explorer and Firefox ignore the IPv6 address
> of www.python.org and use its IPv4 address to connect - while Opera uses
> my Tunnel adapter's IPv6 address to connect to www.python.org's IPv6
> address and fails.
>
> How can I fix Opera's failing IPv6 connection attempt or how can I make
> Opera behave like FF and IE (meaning "use the IPv4 address")?
>
>
> Thorsten
>

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