nothing changed for TE.
The main thing changing lately is the IPv4 depletion coming to its apogee and some ISPs do not provide a public IPv4 anymore to their end users. TE2013 supports IPv6 connectivity, but the server list doesn't, so if your ISP gives you only a private IPv4, then people using the server list won't be able to join your game (ie: they need to use the direct connect feature instead, using your IPv6).
However, I checked your IPv4 and it seems normal so I'm not sure it's the case for you. You should investigate your ISP & your IPv4 to be sure it's not that issue.
== Mana Games ==
>> I don't answer Private Message, except if it's really a _Private_ topic <<