Re: install/58219: sysinst should check if IPv6 is available and set ip6addrctl_policy=ipv4_prefer if no

[Martin Husemann <martin%duskware.de@localhost>]

The following reply was made to PR install/58219; it has been noted by GNATS.

From: Martin Husemann <martin%duskware.de@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: install/58219: sysinst should check if IPv6 is available and set
 ip6addrctl_policy=ipv4_prefer if no
Date: Thu, 2 May 2024 11:31:52 +0200

 I disagree with this aproach. In general it is not a good idea to hardcode
 lots of magic in sysinst to work around clearly broken local setups.
 
 We also should not hardcode such add-hoc decisions made at install time
 for future runtime of the installed machine.
 
 I understand the original request. This often hits at "free" wifi
 services e.g. in hotels. My own usual answer is that ftp(1) (like most
 user applications) should properly do happy-eyeball, to which  the
 typical response is: fix your IPv6 setup. 
 
 In pure IPv4 setups this is no issue, only if some misconfiugred
 router provides a non-working IPv6 default route we get the annoying
 60s connect timeout for IPv6 tries.
 
 Martin