> It does not, however, sound like an attacker can establish arbitrary TCP connections Maybe not, but what if the ports you have open actually are HTTP servers

> It does not, however, sound like an attacker can establish arbitrary TCP connections Maybe not, but what if the ports you have open actually are HTTP servers for development purposes? In that case wouldn't a website be able to crawl your unreleased work, and/or mess with what you're doing, with requests seemingly "out of nowhere"?