The rust server that powers the world and many websites is a part of the web, and it relies on a server to communicate with it.
This makes it vulnerable to a hacker or a man-in-the-middle attack.
To fix it, you have to know where the rust client sits in the stack, what kind of servers it is using, and where it is communicating with other servers.
This post explains how to do this.
A quick look at the stack: