Iptables

iptables notes

Just some generic notes on working with IP tables. Can be a PITA when an issue is happening to remember the details..

REMEMBER: You can block YOURSELF if you do not use your head!

Dont block:

• Internal IP address
• YOURSELF external IP address (if logging in via public interfaces)
• Loopbacks... Not sure what would happen but expect it would brick things..

Simple blocks

• iptables -A INPUT -s 47.245.124.200 -j DROP

Reminders:

• This will not persist across reboots
• setup of fail2ban would be a heck of a lot easier than manual blocking
• iptables -L -n is your friend