Mitigating DDoS and CC Attacks with iptables
Securing Linux servers against volumetric and application-layer threats requires precise firewall rule implementation. The following configurations demonstrate how to deploy lightweight SYN flood prtoection, concurrent connection caps, and rate-based filtering to neutralize DDoS and Challenge Collapsar (CC) attacks.
1. DDoS Mitigation Strategie ...
Posted on Mon, 29 Jun 2026 17:33:53 +0000 by lordrt
Linux iptables Firewall Configuration Guide
Introduction
iptables is a classic command-line utility used by Linux administrators to configure IPv4 packet filtering rules and Network Address Translation (NAT). While it may be considered legacy compared to modern firewall solutions like firewalld, it remains widely used and essential knowledge for system administrators.
It's important to n ...
Posted on Sat, 20 Jun 2026 17:28:35 +0000 by Moesian
Remote Access to Tomcat on Linux Blocked by Firewall
After installing Apache Tomcat on a CentOS server, you can successfully access it via http://localhost:8080 from the local machine. However, attempts to reach the server from other devices on the same network fail, eventhough ICMP ping requests are answered. The root cause is typically the system firewall blocking incoming connections on port 8 ...
Posted on Mon, 25 May 2026 21:24:33 +0000 by webdesco