Who’s SSHed Into My Server?

So you know how to ssh into your server. We at Liquid Web do too. Sometimes, in the course of supporting you, we need to ssh into the server to figure out what the problem is.

But how do you know if we have shelled into your server? If more than one person is shelled into a server, and all are trying to fix a problem, it is possible that they could step on each others’ toes. It would be grand if the shell provided a simple yet mighty command that displayed all of the users who are shelled in.

Continue reading “Who’s SSHed Into My Server?”

CSF: Config Server Firewall Installation

An alternative firewall to APF is the Config Server Firewall, or CSF.

CSF is generally considered a more advanced firewall as there are more configuration options compared to other firewalls, while still being simple enough to install and configure that even novice administrators can use it. This article will give you a simple overview about how to install and configure CSF and its security plugin LFD (Login Failure Daemon).

Continue reading “CSF: Config Server Firewall Installation”

cPanel How To: Change a Domain’s MX Record

This guide will walk you through the process of changing a domain’s Mail Exchange (MX) record(s) to point e-mail at a different server. MX records are a critically important part of a web site’s DNS because they tell the rest of the internet where to send e-mail for a domain.

Continue reading “cPanel How To: Change a Domain’s MX Record”

Using rsync to Transfer and Synchronize Local and Remote Systems

Rsync is a powerful tool that facilitates the transfer and synchronization of data between both local and remote systems.

File Synchronization 101: The Basics
I. Using rsync to Transfer and Synchronize Local and Remote Systems
II. How to Setup SSH Keys for Use with File Synchronization

 

Continue reading “Using rsync to Transfer and Synchronize Local and Remote Systems”

Restarting Services From the Command Line

One of the more common tasks that needs to be done on live servers is restarting services(such as Apache, mail, ftp, and DNS). A few of the reasons for services needing to be restarted can vary from the service crashing, the load on the server being too high, or a restart to make a configuration change take affect.

Continue reading “Restarting Services From the Command Line”