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Port range for firewalld must use a dash, not colon · Issue #2821 · fail2ban/fail2ban · GitHub
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rhel - Foward ports with iptables NAT rules? - Unix & Linux Stack Exchange
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How to set up a firewall using FirewallD on OpenSUSE Linux - nixCraft
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How to Open Ports on a Linux Server Firewall: 5 Methods
How to set up a firewall using FirewallD on OpenSUSE Linux - nixCraft
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How to define a custom Firewalld zone - Linux Tutorials - Learn Linux Configuration
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How to Setup Linux Firewall Using Firewalld - Cherry Servers
