When Docker (or Podman) publishes container ports, the published ports are honored by firewalld. In some cases, users want firewalld to be strict and block those ports. This has been outlined in a previous post. Firewalld now supports Stric…
Docker supports publishing ports for a container. This allows external access to the container. When firewalld is running these published ports are honored and a hole is opened in firewalld. For most users, e.g. workstations, this a good th…
The new firewalld version 0.4.3.1 is available as a bug fix only release for version 0.4.3. Fixes missing ICMP rules for some zones The zone specific ICMP rules for ICMP block inversion have been missing in zones with bindings, that are def…
Firewalld provides a dynamically managed firewall with support for network/firewall zones that define the trust level of network connections or interfaces. It has support for IPv4, IPv6 firewall settings, ethernet bridges and IP sets. There…
To configure or add zones you can either use one of the firewalld interfaces to handle and change the configuration. These are the graphical configuration tool firewall-config, the command line tool firewall-cmd or the D-BUS interface. Or y…
The zone configuration can contain these tags and attributes. Some of them are mandatory, others optional. The mandatory zone start and end tag defines the zone. This tag can only be used once in a zone configuration file. There are optiona…
You can use the source repository directly to test out changes. To check out the source repository, you can use: This will create a local copy of the repository. Change into the firewalld base directory of the repository and set the followi…
This is the command line tool to be able to configure firewalld if it is not running or active, for example in the system installation stage or in a change root. You need to be root to use firewall-offline-cmd. firewall-offline-cmd is only
The firewalld project uses github for tracking issues and the overall development process. If you’d like to report a bug you found in any of the components, request a feature to be implemented (or included if you already have a patch) or ju…
The ingress zones list contain at least one regular zone or a single symbolic zone. The egress zones list contain at least one regular zone or a single symbolic zone. For non symbolic zones, the zone must be active. That is, it must have in…
firewall-cmd is the primary command line tool for firewalld. It can be used to get state information about firewalld, to get the firewall configuration for the runtime and permanent environment and also to alter those. Depending on the sele…
The port string can be a single port number or a port range portid-portid or also empty to match a protocol only. The protocol value can either be tcp, udp, sctp or dccp. The protocol can be any protocol supported by the system. Please have…