Cybersecurity

So I was just wondering... Is there a way to send a file directly to the computer..... Ive never gotten the answer and I want to know how, I keep running in to a wall . Why you may ask, well really for security reasons due to the fact that if this is done via a port I want to make sure to close it to prevent crackers, black hats and maybe even gray hats.. If their is a way what is the script or commands required? Unix bash shell.

There are many many ways to send a file to a computer, some standardized like FTP and SCP, others proprietary. The easiest way to achieve what you wish to do is to lock down all ports by default except for those ports you specifically permit to be open.

There is no direct way. TCP/IP communication is almost invariably programs on one machine communicating with programs on a different machine (or perhaps the same machine), there's no trapdoors that directly instruct the kernel to do anything to files. The only exceptions that leap to mind are network filesystem drivers, and given the number of hoops you have to jump through to get NFS going on purpose, having it happen by accident seems sincerely unlikely! Not to say that there may not be brain-dead distros that have open NFS by default -- but when it's off, it's off, and isn't going to be nudged into running just because someone bothers your network enough. Same goes for any other system daemon capable of creating files -- someone with administrator access actually has to turn it on. Or, someone on the inside can run something on an anonymous port if you haven't firewalled that, but it'll have no more access than the user does...

What's more likely to happen is an exploitation of mundane things. A badly written CGI script could be abused to create and/or execute files in /tmp. (For this reasons some web servers have hardened /tmp/ partitions that literally cannot execute any files in them.) Or a limited account with a weak password gets cracked and they just live in that tiny corner of your machine, connecting to a botnet and cracking passwords for it. And so on. They don't have to crack your whole system to use you, and a smart cracker won't interfere with the operations of your system lest you notice.

I don't have any idea regarding It security, I encountered Sinux but Linux don't have any idea yet.. but i am glad to be here i just keep learning.. thanks for the information )

---------- Post updated at 12:54 PM ---------- Previous update was at 12:47 PM ----------

sorry for my mistake.. i don't have any idea to send a file through using Ip.