ipv6

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h1. Software that needs to be improved for IPv6

h2. xrdp 

Does not listen on IPv6 sockets under Linux. See the "github bug":https://github.com/neutrinolabs/xrdp/issues/1450

Applicable for at least version xrdp-0.9.13.1.

h2. hackney

... is a very popular Erlang HTTP client. It is used by many Elixir libraries. It's not possible to configure IPv6

(see "github bug":https://github.com/benoitc/hackney/issues/206). It is also used by "Pleroma":https://pleroma.social/

h2. cpanel

cpanel only resolves IPv4 addresses.

Code from 2017:

<pre>

  sub _resolveIpAddress

   my ( $host, %p_options ) = @_;

  @addresses = Socket::getaddrinfo( $host, ( $p_options{'ipv6'} ? &Socket::AF_INET6 : &Socket::AF_INET ) );

</pre>

  however p_options is always empty!

Log from 2019

<pre>

 Today at 9:51 PM

 @cPanelPhilH We are having 3-4 customers in the backlog for cpanel support - do you have a statement that we can forward in terms of timing for IPv6 only support?

 cPanelPhilHToday at 9:52 PM

 We have no plans of delivering IPv6 only support at this time, however that may change based on a number of factors, including demand.

 LucasRolff (DramaQueen)Today at 9:53 PM

 @cPanelPhilH https://snaps.trollcdn.com/XIGYoS5sLCV7mqt1E1f2NoFRvxAjZl5NtrTJ0wIEXa.png

 It always complain about "Missing period" and "Missing comma(s) with interrupter"

 cPanelPhilHToday at 9:53 PM

 @LucasRolff (DramaQueen) i only hit 11K this week

 LucasRolff (DramaQueen)Today at 9:53 PM

 As long as your beer counter went up then it's ok

 ungleichToday at 9:54 PM

 Fair enough! In that case we will look into alternatives for these

 customers at the moment. If you are interested in actively pursuing

 it, we are open to helping you with infrastructure and knowledge -

 just give me a ping.

</pre>

h2. Openconnect

"Invalid host entry" when connecting to the VPN host via NAT64:

<pre>

 Openconnect: not sure

 [19:39] freiheit:~%  openconnect --user=ABC --usergroup=XXX  sslvpn.example.ch

 POST https://sslvpn.example.ch/XXXX

 Connected to [2a0a:e5c0:0:1:0:1:....:....]:443

 SSL negotiation with sslvpn.example.ch

 Connected to HTTPS on sslvpn.example.ch

 XML POST enabled

 Invalid host entry. Please re-enter.

 Failed to obtain WebVPN cookie

 [19:40] freiheit:~%

</pre>

This might be an endpoint / configuration issue.

h2. Clojure

* "clojure boot has no ipv6 support in the binary":https://github.com/boot-clj/boot/issues/757

* "clojure/lein/maven missing ipv6 support":https://github.com/technomancy/leiningen/issues/2000