Hello Janne,   
      
   On Thursday October 25 2018 10:06, you wrote to Benny Pedersen:   
      
    MvdV>>> If the destination address is a 6to4 tunnel address (2002::/16)   
    MvdV>>> many OSs default to IPv4 if an IPv4 address is present.   
      
    >> time to update to a later glibc where ipv6 is prefered over ipv4   
    >> failback   
      
    JJ> I think its mostly a setting in your resolv.conf or similar file to   
    JJ> change default priority of v4 or v6 and not so much a age-of-glibc   
    JJ> issue.   
      
   Prefering IPv4 over IPv6 in case of a 6to4 tunnel makes sense for most   
   applications. 6to4 is irratic end not very reliable. When browsing the web   
   prefering IPv6 may lead to annoying delays because of fall backs to IPv4.   
      
   With binkd this is different. It is not a human that gets annoyed, it is a   
   patient robot that does not mind first trying IPv6, failing and then trying   
   IPv4 a minute later.   
      
   That is why it makes sense to leave the OS preference as is and override it in   
   binkd's config when desired.   
      
      
   Cheers, Michiel   
      
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