Another day - another disconnect
Some players seem to have a lot more disconnects than others. Excluding two days with unstable servers, I have only had a few disconnects since the start of the closed beta. The servers themselves are fine, for the most part. The problem seems to stem from recovering from a lost connection.
There are three parts involved here:
1. The user's network
2. The connection between the user and the server
3. The server
If you have a stable internet connection, there can still be an issue with a firewall blocking traffic or a hop along the way causing problems with the server.
You can try to disable the firewall and try again. If possible, also try a different computer/laptop. If neither of these things offer a solution, it could be an ISP issue. Troubleshooting this is an arduous task, though.