Firewall-CMD Get Service Details Tips. Firewalls are devices or software programs that control network traffic. They allow only certain types of data through their ports. Also, depending on whether they are configured to block or allow them.
Firewall-cmd gets service details and allows you to view detailed information about services running on your system. This information includes the name of the service, its current status, and where it was originally from.
What is Firewall-CMD?
Firewall-cmd is a command-line interface for the firewall daemon. It is available on most systems that run Fedora or Red Hat Enterprise Linux.
Firewall-cmd gets its configuration from the iptables and ip6tables services.
What is a firewall?
A firewall is a system to allow or block the exchange of information between two networks. Firewalls are usually between local area networks (LANs) and wide-area networks (WANs) to protect LANs from any unauthorized access from WANs.
Firewall-cmd gets service details command is to display information about the firewall related services on your system.
How to use firewall-cmd get service details command?
Specifies an interface or zone for the rule, for example,
1 –zone=public. If no zone is specified, then the rule will match on all interfaces. 2-l, –list List all available services and their current status. 3-a, –all List all available services, including those not enabled at boot time. 4-m, –enable List all enabled services only. 5-p, –port list List all port maps for services in a list that have a port map defined.
6-n, –notify Enable notifications for listed services when they change state. 7-i, –interfaces Display interfaces on which firewall features are active by default. 8-d, –disable Display interfaces on which you disable firewall features by default. 9-e, –enable Display interfaces on which you enable firewall features by default. 10-x, –exclude display Exclude current interface from display when specified with the ‘interfaces’ option.
Benefits of having a firewall in place
The firewall is a security mechanism that controls network traffic to and from a server or computer. You can build the firewall into a router. Or a software program installed on a server or both.
Firewalls are useful for many purposes, including the following:
1=To monitor and control incoming and outgoing Internet traffic.
2=To protect internal servers from unauthorized access.
3=To prevent users on the internal network from accessing specific Internet sites.
4=To collect information on outgoing traffic to specific sites.
Limitations of firewall-cmd get service details command
This command allows you to view detailed information about services running on your system. This information includes the name of the service, its current status, and where it was originally from.
1= removeservice remove a service from the firewall configuration. 2= Use the –wait option if you are using an active firewall ruleset. 3= Otherwise, using –nowait will cause changes to take effect immediately.
4= removezone zone_name zone_type remove a zone from the firewall configuration. use the –wait option if you are using an active firewall ruleset. Otherwise, using –nowait will cause changes to take effect immediately. 5=save– save current firewall configuration (including rules, zones and port maps) in persistent storage.
So that they are for boot time if the system boots into an operating system image with a version of FirewallD that supports this feature. Use this command when you are making multiple changes to your configuration and want to make sure they are all saved before you reboot with them applied!
6=Flush– flush all firewall rules and delete all non-default chains in the firewall configuration. 7=Reload– reload all firewall rules, regardless of whether they have changed since last time or not. If a change occurred for a rule which is currently processed by a chain, it will be added to that chain; otherwise, it will be added at the end of all chains currently being processed by the firewall.