The Minecraft client does not query the DNS recursor for a SRV record.
A look at the DNS queries (using Wireshark) shows that the current Minecraft client (1.5.1) only queries for AAAA- and A-records but not for a SRV-record.
This bug has been reported a couple of times before and marked as "Fixed" in MC-6941. It's not fixed.
Linked issues
Comments 5
I'm sorry for that. It's the first time I use this page and I wasn't sure if a comment will be seen, because in MC-6941 Jon Atkins got no reply to his answer. Won't happen again.
Confirmed.
We need to use 'dns4java' to do this properly. The current implementation depends on abusing of 'sun.*' classes which is JVM implementation specific.
With the new launcher we can also add libraries easier, so this will be taken care off.
Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases. If this has been done, we can reopen the issue.
Keep in mind that the "Resolved"-Status on this ticket just means "Answered", and that we are waiting for further information on whether this issue still exists or not. We will reopen it as soon as the requested information has been deliviered.
Duplicate of MC-6941. You did the correct thing by commenting there, and the wrong thing by making a redundant issue. You've just got to give someone time to review. There's a lot of traffic on the tracker, and has been even more than usual because of the latest snapshot.