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INVALID_SERVICE upon firewall command

R_S_C asked: Upon entering following command, firewall-cmd –add-service=postgresql-13 –permanent I am getting this Error: INVALID_SERVICE: ‘postgresql-13’ not among existing services Where, postgresql-13 is my service. What must have gone wrong? …

Using Docker with firewalld

PatricF asked: TL;DR Trying to masquerade everything from Docker with firewalld manually. I just started to use firewalld on my Debian 10 machine since I want to learn how it …