Install Haproxy On Centos 7 Firewall Vs Iptables Commands

I installed CentOS 7 with minimal configuration (os + dev tools). I am trying to open 80 port for httpd service, but something wrong with my iptables service. What's wrong with it? What am I doing wrong? # ifconfig/sbin/service iptables save bash: ifconfig/sbin/service: No such file or directory # /sbin/service iptables save The service command supports only basic LSB actions (start, stop, restart, try-restart, reload, force-reload, status). For other actions, please try to use systemctl.

How To Install Iptables Firewall In CentOS 7. Which can be used to run the iptables command, however we also need to install iptables-services in order. Learn how to stop and completely disable the firewall in CentOS 7. How To Disable The Firewall In CentOS 7. Or iptables in CentOS 7 through the command line.

# sudo service iptables status Redirecting to /bin/systemctl status iptables.service iptables.service Loaded: not-found (Reason: No such file or directory) Active: inactive (dead) # /sbin/service iptables save The service command supports only basic LSB actions (start, stop, restart, try-restart, reload, force-reload, status). For other actions, please try to use systemctl.

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# sudo service iptables start Redirecting to /bin/systemctl start iptables.service Failed to issue method call: Unit iptables.service failed to load: No such file or directory. With RHEL 7 / CentOS 7, was introduced to manage iptables. IMHO, firewalld is more suited for workstations than for server environments. It is possible to go back to a more classic iptables setup.

First, stop and mask the firewalld service: systemctl stop firewalld systemctl mask firewalld Then, install the iptables-services package: yum install iptables-services Enable the service at boot-time: systemctl enable iptables Managing the service systemctl [stop start restart] iptables Saving your firewall rules can be done as follows: service iptables save or /usr/libexec/iptables/iptables.init save. You should use that kind of command: # add ssh port as permanent opened port firewall-cmd --zone=public --add-port=22/tcp --permanent Then, you can reload rules to be sure that everything is ok firewall-cmd --reload This is better than using iptable-save, espacially if you plan to use lxc or docker containers.

Launching docker services will add some rules that iptable-save command will prompt. If you save the result, you will have a lot of rules that should NOT be saved. Because docker containers can change them ip addresses at next reboot. Firewall-cmd with permanent option is better for that. Check 'man firewall-cmd' or to see options. There are a lot of options to check zones, configuration, how it works.

Man page is really complete. I strongly recommand to not use iptables-service since Centos 7.