Jan Macku

Thank you for quick fix.

Hello Dmitry, Thank you for your prompt response. Can you imagine some negative use cases in practice due to the removal of the current mandatory IPv4 default? (I mean the risk of significant breakage of someone's habits, scripts, etc.) I think this change should be safe. But even if it affects some scripts, mitigation should be straightforward by using the -4 option. As you mentioned, ping already has such a behavior. [root@R9 ~]# ping kernel.org PING kernel.org(dfw.source.kernel.org (2604:1380:4641:c500::1))...

RFC-3484: Traceroute should defaults to IPv6 instead of IPv4 if possible