-
-
Save seeruk/b583cc6f048270e0ddc0105e4b36e480 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/bin/bash | |
iptables -F | |
iptables -X | |
iptables -P INPUT DROP | |
iptables -P FORWARD DROP | |
iptables -P OUTPUT ACCEPT | |
# Allow established connections | |
iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT | |
# Loopback | |
iptables -A INPUT -i lo -j ACCEPT | |
iptables -A FORWARD -i lo -j ACCEPT | |
iptables -A OUTPUT -o lo -j ACCEPT | |
# Ping | |
iptables -A INPUT -p icmp --icmp-type echo-request -j ACCEPT | |
iptables -A OUTPUT -p icmp --icmp-type echo-reply -j ACCEPT | |
# SSH | |
iptables -A INPUT -p tcp --dport 22 -j ACCEPT | |
# DNS | |
iptables -A INPUT -p tcp --dport 53 -j ACCEPT | |
iptables -A INPUT -p tcp --sport 53 -j ACCEPT | |
# Docker | |
iptables -A FORWARD -i docker0 -o eth0 -j ACCEPT | |
iptables -A FORWARD -i eth0 -o docker0 -j ACCEPT | |
iptables -N DOCKER | |
iptables -A FORWARD -o docker0 -j DOCKER | |
iptables -A FORWARD -o docker0 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT | |
iptables -A FORWARD -i docker0 ! -o docker0 -j ACCEPT | |
iptables -A FORWARD -i docker0 -o docker0 -j ACCEPT | |
# Docker Interception (note we use -I to insert the PRE_DOCKER chain above the DOCKER chain) | |
iptables -N PRE_DOCKER | |
iptables -I FORWARD -o docker0 -j PRE_DOCKER | |
## Limit access to port 8000 so that only 1.2.3.4 can access it | |
iptables -A PRE_DOCKER -s 1.2.3.4 -p tcp --dport 8000 -j ACCEPT | |
iptables -A PRE_DOCKER -p tcp --dport 8000 -j DROP |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment