Recently I’ve enabled firewall through firewall-applet located in System Tray, after I run on terminal this command:
sudo systemctl status firewalld
[sudo] password for user:
● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; preset: disabled)
Active: active (running) since Tue 2023-10-24 14:51:52 -05; 3h 58min ago
Docs: man:firewalld(1)
Main PID: 745 (firewalld)
Tasks: 4 (limit: 18960)
Memory: 60.4M
CPU: 1.821s
CGroup: /system.slice/firewalld.service
└─745 /usr/bin/python /usr/bin/firewalld --nofork --nopid
oct 24 14:51:57 antares firewalld[745]: WARNING: COMMAND_FAILED: '/usr/bin/iptables -w10 -t filter -F DOCKER-ISOLATION-STAGE-1' failed: iptables: No chain/target/match by that name.
oct 24 14:51:57 antares firewalld[745]: WARNING: COMMAND_FAILED: '/usr/bin/iptables -w10 -t filter -X DOCKER-ISOLATION-STAGE-1' failed: iptables: No chain/target/match by that name.
oct 24 14:51:57 antares firewalld[745]: WARNING: COMMAND_FAILED: '/usr/bin/iptables -w10 -t filter -F DOCKER-ISOLATION-STAGE-2' failed: iptables: No chain/target/match by that name.
oct 24 14:51:57 antares firewalld[745]: WARNING: COMMAND_FAILED: '/usr/bin/iptables -w10 -t filter -X DOCKER-ISOLATION-STAGE-2' failed: iptables: No chain/target/match by that name.
oct 24 14:51:57 antares firewalld[745]: WARNING: COMMAND_FAILED: '/usr/bin/iptables -w10 -t filter -F DOCKER-ISOLATION' failed: iptables: No chain/target/match by that name.
oct 24 14:51:57 antares firewalld[745]: WARNING: COMMAND_FAILED: '/usr/bin/iptables -w10 -t filter -X DOCKER-ISOLATION' failed: iptables: No chain/target/match by that name.
oct 24 14:51:57 antares firewalld[745]: WARNING: COMMAND_FAILED: '/usr/bin/iptables -w10 -D FORWARD -i docker0 -o docker0 -j DROP' failed: iptables: Bad rule (does a matching rule exist in that>
oct 24 14:51:57 antares firewalld[745]: WARNING: COMMAND_FAILED: '/usr/bin/iptables -w10 -D FORWARD -i docker0 -o docker0 -j DROP' failed: iptables: Bad rule (does a matching rule exist in that>
oct 24 18:26:40 antares firewalld[745]: WARNING: COMMAND_FAILED: '/usr/bin/iptables -w10 -D FORWARD -i docker0 -o docker0 -j DROP' failed: iptables: Bad rule (does a matching rule exist in that>
oct 24 18:26:41 antares firewalld[745]: WARNING: COMMAND_FAILED: '/usr/bin/iptables -w10 -D FORWARD -i docker0 -o docker0 -j DROP' failed: iptables: Bad rule (does a matching rule exist in that>
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I don’t know if these warning messages need be fixed or omitted. I have Docker running as service but I’ve not used it yet after my re-installation of system.
I don’t know how to use Firewall Configuration in the case I wish to disable all incoming connections through ssh.