subject:"Re\: Request for Support\: QEMU IPv6 Port Forwarding Issue"

Re: Request for Support: QEMU IPv6 Port Forwarding Issue

2024-03-19 Thread BALATON Zoltan

On Tue, 19 Mar 2024, Thomas Huth wrote:

On 19/03/2024 06.53, Srinivasu Kandukuri (MS/ECP2-ETAS-VOS) wrote:

Dear QEMU Support Team,

We are currently encountering difficulties in utilizing QEMU for starting a
virtual machine image on Windows with IPv6 networking, specifically related
to port forwarding. We are using QEMU emulator version 7.1.93
(v7.2.0-rc3-11946-gb68e69cdcc-dirty).

Our objective is to establish IPv6 network connectivity within the virtual
machine and forward ports to allow external access. However, we are
encountering errors when attempting to configure the port forwarding
mechanism.

Here is the command we are using:

*qemu-system-x86_64: -netdev
user,id=net1,ipv6=on,ipv6-net=fe80::5054:ff:fecd:585a/64,hostfwd=tcp::2210-[fe80::5054:ff:fecd:585a]:22*

However, upon executing this command, we encounter the following error:

*Invalid host forwarding rule 'tcp::2210-[fe80::5054:ff:fecd:585a]:22' (Bad
guest address)*

We understand that the format for specifying host forwarding rules follows
the pattern:

*protocol:[listen_address]:listen_port-[dest_address]:dest_port*

We believe that we are following this pattern correctly, but still, we are
encountering errors.

Hi!

Looking at the code:

https://gitlab.com/qemu-project/qemu/-/blob/v8.2.0/net/slirp.c#L824

it seems like QEMU is only using inet_aton() here, which means IPv4 only,
sorry, but this likely needs some additional changes first to support IPv6
addresses here.

Other than that, the [] in the help mean optional components so you don't
need to put that in the command. But if it does not handle IPv6 addresses
then maybe not only that's the problem. However since dest_address is
optional and does not need to be specified you could try to leave that
[fe80::5054:ff:fecd:585a] out completely then the rule should applie to
all guests but if you only have one guest then it does not matter.

Regards,
BALATON Zoltan

Thomas

Our primary concern is whether QEMU supports port forwarding for IPv6
networking. If it does, we kindly request your assistance in resolving this
issue and providing guidance on the correct configuration for achieving our
objective.

Could you please advise us on the proper usage of port forwarding with IPv6
networking in QEMU? Any insights, suggestions, or instructions you can
provide would be greatly appreciated.

Thank you very much for your attention to this matter. We look forward to
your prompt response and assistance.

Mit freundlichen Grüßen / Best regards

*Kandukuri Srinivasu*

Registered Office: Stuttgart, Registration Court: Amtsgericht Stuttgart,
HRB 14000;

Chairman of the Supervisory Board: Prof. Dr. Stefan Asenkerschbaumer;
Managing Directors: Dr. Stefan Hartung, Dr. Christian Fischer, Dr. Markus
Forschner,

Stefan Grosch, Dr. Markus Heyn, Dr. Frank Meyer, Dr. Tanja Rückert

Re: Request for Support: QEMU IPv6 Port Forwarding Issue

2024-03-19 Thread Samuel Thibault

Hello,

Thomas Huth, le mar. 19 mars 2024 15:28:12 +0100, a ecrit:
> On 19/03/2024 06.53, Srinivasu Kandukuri (MS/ECP2-ETAS-VOS) wrote:
> > Dear QEMU Support Team,
> > 
> > We are currently encountering difficulties in utilizing QEMU for
> > starting a virtual machine image on Windows with IPv6 networking,
> > specifically related to port forwarding. We are using QEMU emulator
> > version 7.1.93 (v7.2.0-rc3-11946-gb68e69cdcc-dirty).
> > 
> > Our objective is to establish IPv6 network connectivity within the
> > virtual machine and forward ports to allow external access. However, we
> > are encountering errors when attempting to configure the port forwarding
> > mechanism.
> > 
> > Here is the command we are using:
> > 
> > *qemu-system-x86_64: -netdev 
> > user,id=net1,ipv6=on,ipv6-net=fe80::5054:ff:fecd:585a/64,hostfwd=tcp::2210-[fe80::5054:ff:fecd:585a]:22*
> > 
> > However, upon executing this command, we encounter the following error:
> > 
> > *Invalid host forwarding rule 'tcp::2210-[fe80::5054:ff:fecd:585a]:22'
> > (Bad guest address)*
> > 
> > We understand that the format for specifying host forwarding rules
> > follows the pattern:
> > 
> > *protocol:[listen_address]:listen_port-[dest_address]:dest_port*
> > 
> > We believe that we are following this pattern correctly, but still, we
> > are encountering errors.
> 
> Looking at the code:
> 
>  https://gitlab.com/qemu-project/qemu/-/blob/v8.2.0/net/slirp.c#L824
> 
> it seems like QEMU is only using inet_aton() here, which means IPv4 only,
> sorry, but this likely needs some additional changes first to support IPv6
> addresses here.

Nicholas Ngai's work is still pending integration:

https://lists.gnu.org/archive/html/qemu-devel/2022-03/msg05643.html
https://gitlab.com/qemu-project/qemu/-/issues/347

Samuel

Re: Request for Support: QEMU IPv6 Port Forwarding Issue

2024-03-19 Thread Thomas Huth

On 19/03/2024 06.53, Srinivasu Kandukuri (MS/ECP2-ETAS-VOS) wrote:

Dear QEMU Support Team,

Here is the command we are using:

*qemu-system-x86_64: -netdev
user,id=net1,ipv6=on,ipv6-net=fe80::5054:ff:fecd:585a/64,hostfwd=tcp::2210-[fe80::5054:ff:fecd:585a]:22*

However, upon executing this command, we encounter the following error:

*Invalid host forwarding rule 'tcp::2210-[fe80::5054:ff:fecd:585a]:22' (Bad
guest address)*

We understand that the format for specifying host forwarding rules follows
the pattern:

*protocol:[listen_address]:listen_port-[dest_address]:dest_port*

We believe that we are following this pattern correctly, but still, we are
encountering errors.

Hi!

Looking at the code:

https://gitlab.com/qemu-project/qemu/-/blob/v8.2.0/net/slirp.c#L824

it seems like QEMU is only using inet_aton() here, which means IPv4 only,
sorry, but this likely needs some additional changes first to support IPv6
addresses here.

Thomas

Could you please advise us on the proper usage of port forwarding with IPv6
networking in QEMU? Any insights, suggestions, or instructions you can
provide would be greatly appreciated.

Thank you very much for your attention to this matter. We look forward to
your prompt response and assistance.

Mit freundlichen Grüßen / Best regards

*Kandukuri Srinivasu*

Registered Office: Stuttgart, Registration Court: Amtsgericht Stuttgart, HRB
14000;

Chairman of the Supervisory Board: Prof. Dr. Stefan Asenkerschbaumer;
Managing Directors: Dr. Stefan Hartung, Dr. Christian Fischer, Dr. Markus
Forschner,

Stefan Grosch, Dr. Markus Heyn, Dr. Frank Meyer, Dr. Tanja Rückert

Re: Request for Support: QEMU IPv6 Port Forwarding Issue

Re: Request for Support: QEMU IPv6 Port Forwarding Issue

Re: Request for Support: QEMU IPv6 Port Forwarding Issue

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