On Wednesday August 24 2016 12:47, you wrote to Mike Miller:
MM>> Hey, if there's a delay, someone needs to fix their setup, MM>> that's on their end, not mine! :D
TL> The only time you would normally get a delay is if the BBS is not TL> listening on IPv6, but has an AAAA record. Then IPv6 capable hosts TL> will experience a delay as they try a non existent IPv6 service, TL> before falling back to IPv4.
Yes, that would cause a dalay. But it is not the only way dalays can occur.
TL> IPv4 hosts aren't affected. They'll simply look up the A record and TL> make an IPv4 connection straight away.
Properly set up IPv4 systems are not affected.
But what also can happen is that the servers supports and advertises IPv6 and the client just /thinks/ it has IPv6 connectivity. 6to4 and Teredo tunnels are notorious for this. The client tries IPv6 first, but gets no connection because it does not have a working IPv6 connection.
Teredo is history, or at least it should be, Microsoft shut off their Teredo servers.
