Set Up a Default Webserver and Limit Access

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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
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