I have a very weird problem with few of my servers. It seems that users on these servers, whenever they download from them, either via FTP (proftpd) or HTTP (apache2), big files (over 1GB), the download connection is dropped exactly when they reach 1GB of downloaded data.
The problem is not random, it happens every time, with all accounts, and exactly around the 1GB mark. I cannot figure out what can cause this.
Servers are running Ubuntu Linux Oneiric Ocelot