Subj : Connection Tests
To   : Michiel van der Vlist
From : Victor Sudakov
Date : Fri Apr 07 2023 12:25 am

Dear Michiel,

06 Apr 23 15:38, you wrote to me:

 VS>> Does anyone know what software clients actually support IPv6
 VS>> Pin-holing?

 MV> I am not sure what you mean by "software clients" in this context.
 MV> IPv6 pin-holing is something that is applied to a firewall. Firewalls
 MV> are found in routers and OSs.

A "software client" in this context is a software like Transmission or uTorrent for example, which is capable of requesting a router to open a port to allow incoming packets to the address/ports where the software is listening.

In other words, a "software client" is something that "applies" pin-holing to a firewall.

 VS>> I would think Bittorrent clients and utilities like syncthing
 VS>> should (because they support UPnP for IPv4), but I guess they
 VS>> don't do IPv6 Pin-holing. Maybe some games?

 MV> Please eleborate...

The Transmission torrent client, and the syncthing file synchronization utility can use the UPnP protocol to request a firewall to pass *IPv4* incoming traffic (and create a port porwarding for IPv4 NAT). They cannot however (at least to my knowledge) use UPnP or any other protocol to request a router to open a hole for incoming traffic in an *IPv6* firewall.

Victor Sudakov, VAS4-RIPE, VAS47-RIPN
--- GoldED+/BSD 1.1.5-b20170303-b20170303
 * Origin: Ulthar (2:5005/49)

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