Tag Archives - network

Understanding MX Records

MX (Mail eXchanger) records are like an address for your domain’s email. The MX record tells the rest of the internet where to send your email. For Mac OS X or Linux Users: Mac OS X Users: Open your Applications folder, then Utilities. Double click on the Terminal application. Linux Users: Open your favorite Terminal/Shell…

Using Telnet To Check SMTP Service

One of the most common e-mail issues we encounter in our support department is customers who are traveling and are encountering problems trying to send e-mail. Quite often this is the result of connecting to a new network that you haven’t used to send e-mail before, like an open wireless network in a coffee shop,…

Error: (98)Address already in use: make_sock: could not bind to address 0.0.0.0:80 on Ubuntu [SOLVED]

Pre-Flight Check These instructions are intended specifically for solving the error: (98)Address already in use: make_sock: could not bind to address 0.0.0.0:80 I’ll be working from both sxi.io Web Core Managed Ubuntu 12.04 LTS and 14.04 LTS servers, and I’ll be logged in as root. Option #1: Multiple ‘Listen’ Directive Entries in Configuration Files In…

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…

What is localhost?

localhost is a networking term; it’s the hostname for the loopback network interface of whichever server it’s said in reference to (meaning every server has a ‘localhost‘). The loopback interface bypasses any local network interface hardware, and serves as a method to connect back to the server itself. The term localhost is used often in…

How To: Mac OS X Cisco VPN Set Up

Starting with Mac OS X 10.6 it is now possible to connect to a Cisco IPSec VPN without having to download any extra software. Main Set Up Steps Before you begin please have your VPN’s IP address, your username, password, shared secret, certificate, and/or group name ready. If you do not have this information please…

Featured Freeware: MTR

Featured Freeware highlights some of the sxi.io Web staff’s favorite free software. This week we are covering a treasured favorite, MTR. Note: This post assumes you have a working knowledge of traceroute. MTR (originally Matt’s Traceroute, now My Traceroute) functions like traceroute insofar as it displays the network hops from your local machine (or server,…

Reading Bandwidth Graphs In Manage

Have you ever wanted to check up on the details of your server’s bandwidth usage? sxi.io Web’s manage interface provides graphs that give you such information. Here’s how to read them. To see the bandwidth graphs for a server in manage, simply click the plus sign by the specific server. The server dashboard will expand,…