AWS EC2 で iptables の初期設定

Server

取り敢えず現状の設定を保存する：

$ sudo iptables-save > iptables.org
$ cat iptables.org
# Generated by iptables-save v1.4.18 on Wed Jun  4 03:52:40 2014
*filter
:INPUT ACCEPT [231:16836]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [143:12612]
COMMIT
# Completed on Wed Jun  4 03:52:40 2014


これをコピーして編集：

$ cat iptables.new
# Generated by iptables-save v1.4.18 on Wed Jun  4 03:52:40 2014
*filter
:INPUT DROP [0:0]
:FORWARD DROP [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
COMMIT
# Completed on Wed Jun  4 03:52:40 2014


restore して save する：

$ sudo iptables-restore < iptables.new
$ sudo iptables -L
$ sudo /etc/rc.d/init.d/iptables save


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