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iptables rules for stand alone web server
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# Generated by iptables-save v1.4.21 on Fri Jan 22 16:03:24 2016 | |
*filter | |
:INPUT ACCEPT [0:0] | |
:FORWARD ACCEPT [0:0] | |
:OUTPUT ACCEPT [10:2136] | |
# allow incoming connection to port 22 | |
-A INPUT -p tcp -m tcp --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT | |
# allow related & established incoming connection (response) by tcp & icmp (ping...) | |
-A INPUT -p tcp -m state --state RELATED,ESTABLISHED -j ACCEPT | |
-A INPUT -p icmp -m state --state RELATED,ESTABLISHED -j ACCEPT | |
# allow new & related & established incomming connection to ports 80 & 443 (web-server) | |
-A INPUT -p tcp -m tcp --dport 443 -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT | |
-A INPUT -p tcp -m tcp --dport 80 -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT | |
# allow related & established incomming connection (response) to ports 80 & 443 (it is necessary to surf web) | |
-A INPUT -p tcp -m tcp --sport 443 -m state --state RELATED,ESTABLISHED -j ACCEPT | |
-A INPUT -p tcp -m tcp --sport 80 -m state --state RELATED,ESTABLISHED -j ACCEPT | |
# allow related & established incomming connection (response) to port 21 (FTP control) | |
-A INPUT -p tcp -m tcp --sport 21 -m state --state RELATED,ESTABLISHED -j ACCEPT | |
# allow related & established incomming connection (response) to port 53 (for DNS) | |
-A INPUT -p tcp -m tcp --sport 53 -m state --state RELATED,ESTABLISHED -j ACCEPT | |
-A INPUT -p udp -m udp --sport 53 -m state --state RELATED,ESTABLISHED -j ACCEPT | |
# allow outgoing new connections to port 123 (ntp syncs) & incomming response | |
$IPT -A OUTPUT -p udp --dport 123 -m state --state NEW,ESTABLISHED -j ACCEPT | |
$IPT -A INPUT -p udp --sport 123 -m state --state ESTABLISHED -j ACCEPT | |
# allow all traffic on loopback | |
-A INPUT -i lo -j ACCEPT | |
#block all traffic in INPUT chaine | |
-A INPUT -j DROP | |
#block all traffic in FORWARD chaine | |
-A FORWARD -j DROP | |
COMMIT | |
# Completed on Fri Jan 22 16:03:24 2016 |
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