Guides tagged “iptables”
Step-by-step MdmHost guides about iptables, sorted A-Z.
7 guides
HestiaCP: manage packages, users and firewall rules
Create a hosting package in HestiaCP, add a user who inherits it, then add and test firewall rules from the panel or the CLI without locking yourself out of SSH.
iptables basics: list, allow, drop and save rules
Learn how iptables chains and rule order work, then build a small ruleset that allows SSH and web traffic, drops everything else and can be edited by line number.
Make iptables rules survive a reboot
iptables rules live in memory and disappear on reboot. Save them with netfilter-persistent on Debian and Ubuntu or iptables-services on AlmaLinux and Rocky Linux.
Migrate iptables rules to nftables
Move an existing iptables firewall to native nftables. Check whether you run iptables-nft or legacy, export with iptables-save, translate the rules, test them and switch the boot service.
Stop Docker from bypassing your UFW firewall
Docker-published ports skip UFW rules and stay open to the internet. Learn why it happens, how to bind ports to 127.0.0.1, how to filter with the DOCKER-USER chain and how to test from outside.
UFW vs firewalld vs nftables vs iptables: which Linux firewall to use
UFW, firewalld, nftables and iptables are not four rival firewalls. Learn how they fit together, what each distro uses by default and how to pick one tool for your VPS.
Using ipset for high-performance IP blacklisting on Linux
Build a kernel-level IP blocklist with ipset and iptables, load thousands of addresses in seconds, and keep the set alive across reboots.
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