REPLY: 2:280/5555 642ecc2c
MSGID: 2:5005/49 642f0211
CHRS: CP866 2
TZUTC: 0700
TID: hpt/fbsd 1.9.0-cur 2019-12-05
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
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