Linux Open Port 80 (HTTP Web Server Port)

am new CentOS/RHEL 5.x/6.x user. How do I open port 80 (Apache Web Server) under Red Hat / CentOS / Fedora Linux?

Tutorial details
Difficulty	Easy (rss)
Root privileges	Yes
Requirements	None
Estimated completion time	2m

The default configuration file for iptables based firewall on RHEL / CentOS / Fedora Linux is /etc/sysconfig/iptables for IPv4 based firewall. For IPv6 based firewall you need to edit /etc/sysconfig/ip6tablesfile.

Open this file using a text editor such as vi/vim or emacs:

Linux Open Port 80 (http)

# vi /etc/sysconfig/iptables

Append rule as follows rules on RHEL/CentOS version 5.x or older:

-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
## Open 443 port i.e. HTTPS
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT

IF you are using RHEL/Centoa version 6.x or above, try:

-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
## Open 443 port i.e. HTTPS
-A INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT

Save and close the file. Restart iptables service, enter:

# /etc/init.d/iptables restart

See "CentOS / Redhat Iptables Firewall Configuration Tutorial" for more information.

Tweet