IPTables: Difference between revisions
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= IPTables =
== Adding Rules ==
List rules▼
iptables -L▼
Allow SSH
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Allow loopback
iptables -I INPUT 1 -i lo -j ACCEPT
== Reporting ==
▲List rules
▲ iptables -L
iptables -L --line-numbers
Logging
iptables -I INPUT 5 -m limit --limit 5/min -j LOG --log-prefix "iptables denied: " --log-level 7
Check Stats
Saving rules▼
iptables -
iptables-restore▼
Reset Packet Counts and Aggregate Size:
== Deleting Rules ==
Delete a Rule
iptables -D INPUT -p tcp --dport 80 -j ACCEPT
iptables -D INPUT -i ens160 -s 10.140.198.7 -j DROP
Delete by Rule Number
iptables -D INPUT 3 # Chain name = INPUT
Flush Chain
iptables --flush MYCHAIN
Flush Iptables
iptables -F
Delete Empty Chain
iptables -X MYCHAIN
== Saving Rules ==
iptables-save > /etc/iptables.conf
Restore them on every reboot
sudo nano /etc/rc.local
iptables-restore < /etc/iptables.conf
= UFW =
== Basic Usage ==
Installation
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sudo ufw status verbose
sudo ufw status numbered
sudo ufw show added
sudo ufw show listening
sudo ufw show builtins
sudo ufw show before-rules
sudo ufw show user-rules
sudo ufw show after-rules
sudo ufw show logging-rules
Manage Application Traffic:
sudo ufw app list
sudo ufw app info Samba
sudo ufw allow from 192.168.1.0/24 to any app Samba
Rate Limiting:
sudo ufw limit 53/udp
sudo iptables -L | grep domain
Check Stats:
sudo ufw show raw
Re-check enable (required):
sudo ufw enable
Reset UFW:
sudo ufw reset
== Receive the UDP multicast traffic ==
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