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Firewall: better loopback badtcp skipping.

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This commit is contained in:
Arne Fitzenreiter
2010-12-30 16:28:19 +01:00
parent cd406833e2
commit d8158ca68c
2 changed files with 4 additions and 1 deletions
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src/initscripts/init.d/fireinfo Executable file → Normal file
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5
src/initscripts/init.d/firewall
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@@ -53,6 +53,9 @@ iptables_init() {
# Chain to contain all the rules relating to bad TCP flags
/sbin/iptables -N BADTCP
#Don't check loopback
/sbin/iptables -A INPUT -i lo -j RETURN
# Disallow packets frequently used by port-scanners
# nmap xmas
/sbin/iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH -j PSCAN
@@ -188,7 +191,7 @@ case "$1" in
/sbin/iptables -A FORWARD -j OUTGOINGFW
# localhost and ethernet.
/sbin/iptables -I INPUT 1 -i lo -m state --state NEW -j ACCEPT
/sbin/iptables -A INPUT -i lo -m state --state NEW -j ACCEPT
/sbin/iptables -A INPUT -s 127.0.0.0/8 -m state --state NEW -j DROP # Loopback not on lo
/sbin/iptables -A INPUT -d 127.0.0.0/8 -m state --state NEW -j DROP
/sbin/iptables -A FORWARD -i lo -m state --state NEW -j ACCEPT