使用Linux PID查找IP地址

Question

1. How to get IP address by using Pid in Linux. and what that pId doing. Is there any way?

2. Only allow the particular user only from that particular IP address, if that user use apart from other IP address must to block. Only that user allow from that IP address. Is this Possible?

Answer 1

It seem your question is bad written. If i understand what you are looking for:

1/ About PID

A PID is a process id. A process is linked to an user. An user can to be a local user or remote ( with ssh by example ) .

Into a shell if you put

$ ps u --pid 2525

Where 2525 is a pid, this command will tell to you which user is linked to this process

$ \w

That will display a list of user currently connected ( local and remotely ) with their corresponding external IP

Alternatively to \\w you can use

$ who user3563068

This command is close to \\w and filter to given username

2/ How to restrict remote access to your computer ?

Using fail2ban will block any external ip which fail to login. fail2ban is to me the way you should to take.

Miscellaneous

To see successful login:

$ last

To see unsuccessful login:

$ lastb

Allowing access from only one IP:

$ iptables -A INPUT -s 192.168.0.2 -j ACCEPT

Where 192.168.0.2 is your ip