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Çağımızda En Çok Kullanılan Saldırı Çeşitlerinden Biri Olan DoS / DDoS Saldırılarından Korunmak İçin Firewall Kurulumunu Paylaşmak İstedim,

Linux (VPS) Hosting İçin Kullananlara Firewall

24 Kasım 2018 Cumartesi

Tag :// firewall, Tag :// linux firewall, Tag :// vps firewall

guard.sh (basic);

#!/bin/bash

# Accept already established connections (so it doesnt drop your current SSH session)

iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

# Accept SSH connections from anywhere

iptables -A INPUT -p tcp -i eth0 --dport ssh -j ACCEPT

# (Optional) Accept HTTP connections from anywhere

iptables -A INPUT -p tcp -i eth0 --dport 80 -j ACCEPT

# Block all other connections!

iptables -A INPUT -j DROP

# Unblock loopback interface

iptables -I INPUT 4 -i lo -j ACCEPT

# Enable logging of denied connections

iptables -I INPUT 5 -m limit --limit 5/min -j LOG --log-prefix "iptables denied: " --log-level 7

# Print current iptables rules

iptables -L -v

# Save current rules

iptables-save > /etc/iptables.up.rules

# (Manual step) Loading rules after boot:

# vi /etc/network/interfaces

# auto eth0

# iface eth0 inet dhcp

# pre-up iptables-restore < /etc/iptables.up.rules

# post-down iptables-restore < /etc/iptables.down.rules