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.
