I recently got a server up and working on my computer for 1.6.4 - it was a lot of confusion and problems, but in the end I have my router set up for port forwarding on :25565, and I have my firewall settings letting Minecraft, my 1.6.4 server, and Java SE Binary through (although I don't know if I needed all of those). However, with the 1.7.2 update, my server isn't working at all anymore. I tried an Open Port Check Tool to see if it's a problem with the other computer, but it says my port is closed on :25565.
So, I have two questions:
1) If I have the Minecraft server (from the Minecraft website), but for 1.6.4, will it update to 1.7.2 on its own, or do I need to download the server 1.7.2 on the website?
2) Why isn't my server working?