Re: Please support download setup-x86_64.exe on IPv6-only network

2023-11-20 Thread Backwoods BC via Cygwin 
On Mon, Nov 20, 2023 at 9:36 PM Brian Inglis via Cygwin
 wrote:
>
> On 2023-11-20 17:45, Lee via Cygwin wrote:
> > On Mon, Nov 20, 2023 at 7:13 PM Backwoods BC via Cygwin wrote:
> >>
> >> On Thu, Nov 16, 2023 at 12:41 PM Brian Inglis via Cygwin wrote:
> >>> The whole IP v4 internet is available as a compatibility subnet 
> >>> :::0:a.b.c.d
> >>> on IP v6, so there is no excuse for not supporting interconnection, as it 
> >>> will
> >>> be required until the last backbone routers drop IP v4 support.
> >>
> >> Just a small correction for the mail archives as this appears solved.
> >> The correct IPV6 address for the IPV4 address range is
> >> :::a.b.c.d  (no '0')
> >
> > If you're going for correcting the record, let's make it correct.
> > :::a.b.c.d is not a solution for IPv6 => IPv4 interconnection over
> > the Internet.
> >
> > from:  https://www.rfc-editor.org/rfc/rfc5156
> >
> > 2.2.  IPv4-Mapped Addresses
> >
> > :::0:0/96 are the IPv4-mapped addresses [RFC4291].  Addresses
> > within this block should not appear on the public Internet.
>
> These internal addresses are used by dual stack hosts to allow clients or
> servers to handle connections to IPv4 hosts the same as IPv6 hosts.
>
> Whereas :::0:0:0/96 == :::0:a.b.c.d allows IPv6 only hosts without
> assigned IPv4 addresses to connect to IPv4 only hosts via SIIT see:
>
> https://www.rfc-editor.org/rfc/rfc7915 Stateless IP/ICMP Translation.

Sorry I got this wrong. I admit to knowing only enough about IP v4 to
be dangerous (and design hardware for it), but I was relying on  this
site for IP v6 info:



In my defence, I also saw this in RFC 4291:

2.5.5.2.  IPv4-Mapped IPv6 Address
   A second type of IPv6 address that holds an embedded IPv4 address is
   defined.  This address type is used to represent the addresses of
   IPv4 nodes as IPv6 addresses.  The format of the "IPv4-mapped IPv6
   address" is as follows:
   |80 bits   | 16 |  32 bits|
   +--+--+
   |..||IPv4 address |
   +--++-+

I hope you can see why I was confused and thought your comment was a
type. I apologize for doubting you.

There are far too many RFCs for someone who has never used IP v6 for
real. I'll just acknowledge that I don't know what I'm talking about
and slink back into the darkness.

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Re: Please support download setup-x86_64.exe on IPv6-only network

2023-11-20 Thread Brian Inglis via Cygwin 

On 2023-11-20 17:45, Lee via Cygwin wrote:

On Mon, Nov 20, 2023 at 7:13 PM Backwoods BC via Cygwin wrote:


On Thu, Nov 16, 2023 at 12:41 PM Brian Inglis via Cygwin wrote:

The whole IP v4 internet is available as a compatibility subnet :::0:a.b.c.d
on IP v6, so there is no excuse for not supporting interconnection, as it will
be required until the last backbone routers drop IP v4 support.


Just a small correction for the mail archives as this appears solved.
The correct IPV6 address for the IPV4 address range is
:::a.b.c.d  (no '0')


If you're going for correcting the record, let's make it correct.
:::a.b.c.d is not a solution for IPv6 => IPv4 interconnection over
the Internet.

from:  https://www.rfc-editor.org/rfc/rfc5156

2.2.  IPv4-Mapped Addresses

:::0:0/96 are the IPv4-mapped addresses [RFC4291].  Addresses
within this block should not appear on the public Internet.


These internal addresses are used by dual stack hosts to allow clients or 
servers to handle connections to IPv4 hosts the same as IPv6 hosts.


Whereas :::0:0:0/96 == :::0:a.b.c.d allows IPv6 only hosts without 
assigned IPv4 addresses to connect to IPv4 only hosts via SIIT see:


https://www.rfc-editor.org/rfc/rfc7915 Stateless IP/ICMP Translation.

--
Take care. Thanks, Brian Inglis  Calgary, Alberta, Canada

La perfection est atteinte   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer but when there is no more to cut
-- Antoine de Saint-Exupéry

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Re: Please support download setup-x86_64.exe on IPv6-only network

2023-11-20 Thread Lee via Cygwin 
On Mon, Nov 20, 2023 at 7:13 PM Backwoods BC via Cygwin wrote:
>
> On Thu, Nov 16, 2023 at 12:41 PM Brian Inglis via Cygwin wrote:
> > The whole IP v4 internet is available as a compatibility subnet 
> > :::0:a.b.c.d
> > on IP v6, so there is no excuse for not supporting interconnection, as it 
> > will
> > be required until the last backbone routers drop IP v4 support.
>
> Just a small correction for the mail archives as this appears solved.
> The correct IPV6 address for the IPV4 address range is
> :::a.b.c.d  (no '0')

If you're going for correcting the record, let's make it correct.
:::a.b.c.d is not a solution for IPv6 => IPv4 interconnection over
the Internet.

from:  https://www.rfc-editor.org/rfc/rfc5156

2.2.  IPv4-Mapped Addresses

   :::0:0/96 are the IPv4-mapped addresses [RFC4291].  Addresses
   within this block should not appear on the public Internet.


Regards,
Lee

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Re: Please support download setup-x86_64.exe on IPv6-only network

2023-11-20 Thread Backwoods BC via Cygwin 
On Thu, Nov 16, 2023 at 12:41 PM Brian Inglis via Cygwin
 wrote:
> The whole IP v4 internet is available as a compatibility subnet 
> :::0:a.b.c.d
> on IP v6, so there is no excuse for not supporting interconnection, as it will
> be required until the last backbone routers drop IP v4 support.

Just a small correction for the mail archives as this appears solved.
The correct IPV6 address for the IPV4 address range is
:::a.b.c.d  (no '0')

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Re: Please support download setup-x86_64.exe on IPv6-only network

2023-11-20 Thread Lee via Cygwin 
On Mon, Nov 20, 2023 at 8:55 AM Jon Turney wrote:
>
> On 16/11/2023 01:40, Bin W via Cygwin wrote:
> > https://www.cygwin.com/setup-x86_64.exe
> > IPv6-only network can't download the installer.
>
> I've spoken to the people who speak to the people who actually
> administer the DNS for us, and an IPv6 DNS record has been added for
> cygwin.com.

Thank you!!

As admin:
  ipconfig /release
so the only IPv4 address I've got is a 169.254.x.x address and I can
- open https://cygwin.com/
- download and run https://cygwin.com/setup-x86_64.exe
- get the current package info and update an already installed package

Regards,
Lee

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Re: Cygwin 3.4.9 - how to install ssh-keygen

2023-11-20 Thread Lee via Cygwin 
On Mon, Nov 20, 2023 at 11:54 AM Matthias wrote:
>
> Dear all,
>
> I've installed cygwin 3.4.9-1 in my virtualbox running on Windows 10.
> After installing defaults plus openssh 9.5p 1-1, I open the Cygwin64-Terminal 
> as Administrator and
> run ssh-host-config.
>  * Answered "yes" to create the /etc/ssh_config and /etc/sshd_config
>  * Answered "no" to use StrictMode
>  * and "yes" to install sshd as a service
>  * I just press  for the question for "Value of CYGWIN for the daemon".
> cygrunsrv -S cygsshd will not start the sshd. The logfile say "no hostkeys 
> available".
>
> Unfortunately  I can't find ssh-keygen in the installable packages.
> Howto install ssh-keygen or how to create hostkeys?

The easy way to see if it's already installed
  $ which ssh-keygen
  /usr/bin/ssh-keygen

If no, Cygwin is a bit of a pain when looking for a program that's
included in another package.

There's probably a better way, but I use the cygwin package search - eg:
  https://cygwin.com/cgi-bin2/package-grep.cgi?grep=ssh-keygen
and then take a guess as the most likely candidate in the results list
and click on that link to see if it's included in that package - eg
  
https://cygwin.com/cgi-bin2/package-cat.cgi?file=x86_64%2Fopenssh%2Fopenssh-9.5p1-1&grep=ssh-keygen


Regards
Lee

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Re: Cygwin 3.4.9 - how to install ssh-keygen

2023-11-20 Thread Hans-Bernhard Bröker via Cygwin 

Am 20.11.2023 um 17:54 schrieb Matthias--- via Cygwin:

Unfortunately  I can't find ssh-keygen in the installable packages.



That's quite strange, given ssh-keygen is clearly right there in that 
openssh package:


$ cygcheck -f /usr/bin/ssh-keygen.exe
openssh-9.5p1-1


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Cygwin 3.4.9 - how to install ssh-keygen

2023-11-20 Thread Matthias--- via Cygwin 
Dear all,

I've installed cygwin 3.4.9-1 in my virtualbox running on Windows 10.
After installing defaults plus openssh 9.5p 1-1, I open the Cygwin64-Terminal 
as Administrator and
run ssh-host-config.
 * Answered "yes" to create the /etc/ssh_config and /etc/sshd_config
 * Answered "no" to use StrictMode
 * and "yes" to install sshd as a service
 * I just press  for the question for "Value of CYGWIN for the daemon".
cygrunsrv -S cygsshd will not start the sshd. The logfile say "no hostkeys 
available".

Unfortunately  I can't find ssh-keygen in the installable packages.
Howto install ssh-keygen or how to create hostkeys?

Thanks in advance
Matthias




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Re: Please support download setup-x86_64.exe on IPv6-only network

2023-11-20 Thread Jon Turney via Cygwin 

On 16/11/2023 01:40, Bin W via Cygwin wrote:

https://www.cygwin.com/setup-x86_64.exe
IPv6-only network can't download the installer.


I've spoken to the people who speak to the people who actually 
administer the DNS for us, and an IPv6 DNS record has been added for 
cygwin.com.


If there are any other problems with using IPv6, please let us know.


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