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| Subject: | Minimal secure iptables firewall |
|---|---|
| Date: | Sat, 16 Jul 2005 21:25:57 +0200 |
Hello all:
Suppose the typical situation where we have a web server we can
secure. What about this minimal iptables configuration?
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
-A INPUT -s <admin_ip> -p tcp -m tcp --dport 22 -j ACCEPT
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -j DROP
-A FORWARD -j DROP
-A OUTPUT -j ACCEPT
That is,
INPUT:
accept local
accept port 80
accept port 22 from admin_ip(s)
accept related and established connections ('related' could be
removed, since I don't permit ftp connections, imho)
deny all other connections
FORWARD:
deny
OUTPUT:
accept (I trust my webserver)
Is this configuration secure? Am I miss something?
Thank you very much,
Carlos.
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