which is on different machine and which it is not even connected to.

What do you mean by "not even connected to"?

accept accepts waits for a connection. It can come from any machine unless you tell it otherwise.

As I've already explained, you are telling it otherwise with LocalHost => 'localhost'. You're telling your server to only listen for connections coming on the loopback adapter, and only clients on the local machine can reach that adapter.

Get rid of LocalHost => 'localhost'.