Set Up a Default Webserver and Limit Access

Posted on by J. Mays
Reading Time: < 1 minute
Pre-Flight Check
  • These instructions are intended to address specifically the following scenario: Set Up a Default Configuration Webserver and Limit Access
  • I’ll be working from a Liquid Web Self Managed CentOS 6.5 server, and I’ll be logged in as root.

Step 1: Install Apache (httpd)

yum -y install httpd
service httpd start
chkconfig httpd on

Step 2a: Add a Basic Test HTML File, Method 1

For a refresher on editing files with vim see: New User Tutorial: Overview of the Vim Text Editor

vim /var/www/html/index.html

Add the following to the text file, and then save and close the text file:

This is a test HTML file!

Step 2b: Add a Basic Test HTML File, Method 2

echo 'This is a test HTML file!' > /var/www/html/index.html

Step 3: Limit Access for Testing

Allow SSH from a specific network, in this case 10.100.100.0/24:

iptables -A INPUT -i eth0 -p tcp -s 10.100.100.0/24 --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -o eth0 -p tcp --sport 22 -m state --state ESTABLISHED -j ACCEPT

Allow HTTP from a specific network, in this case 10.100.100.0/24:

iptables -A INPUT -i eth0 -p tcp -s 10.100.100.0/24 --dport 80 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -o eth0 -p tcp --sport 80 -m state --state ESTABLISHED -j ACCEPT

Allow ping via ICMP:

iptables -A OUTPUT -p icmp --icmp-type echo-request -j ACCEPT
iptables -A INPUT -p icmp --icmp-type echo-reply -j ACCEPT

Set default chain policies:

iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTPUT DROP

Save the configuration:

service iptables save

Start iptables:

service iptables start

About the Author: J. Mays

Have Some Questions?

Our Sales and Support teams are available 24 hours by phone or e-mail to assist.

1.800.580.4985
1.517.322.0434

Latest Articles

How to Install and Configure HAProxy on CentOS 7

Read Article

Restoring Files From an Acronis VMware Backup

Read Article

Liquid Web’s Incident Management Process

Read Article

Microsoft Exchange Server Security Update

Read Article

How to Monitor Your Server in WHM

Read Article