iptables

Fix iptables connection refused, permission denied, and not working errors. Step-by-step commands to diagnose DROP rules, backend conflicts, and conntrack issue

Diagnose and fix iptables connection refused, permission denied, and slow performance issues. Actionable steps to restore your Linux firewall network access.

Fix 'iptables connection refused' errors by diagnosing firewall rules, checking service listening states, and resolving permission denied issues.