diff options
| -rwxr-xr-x | openwrt/target/default/target_skeleton/etc/init.d/S45firewall | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/openwrt/target/default/target_skeleton/etc/init.d/S45firewall b/openwrt/target/default/target_skeleton/etc/init.d/S45firewall index 9bcb11a..c6d0cfa 100755 --- a/openwrt/target/default/target_skeleton/etc/init.d/S45firewall +++ b/openwrt/target/default/target_skeleton/etc/init.d/S45firewall @@ -1,23 +1,33 @@ #!/bin/sh . /etc/functions.sh -WAN=$(nvram get wan_ifname) - -IPT=/usr/sbin/iptables +export WAN=$(nvram get wan_ifname) +export IPT=/usr/sbin/iptables for T in filter nat mangle ; do $IPT -t $T -F $IPT -t $T -X done +# initial rules $IPT -t filter -A INPUT -m state --state INVALID -j DROP $IPT -t filter -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT +$IPT -t filter -A FORWARD -m state --state INVALID -j DROP +$IPT -t filter -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT + +if [ -d /etc/firewall.d ]; then + for fw in /etc/firewall.d/??*; do + [ -x $fw ] && $fw + done +fi + +# defaults + $IPT -t filter -A INPUT -p icmp -j ACCEPT -$IPT -t filter -A INPUT -p 47 -j ACCEPT # allow GRE +$IPT -t filter -A INPUT -p 47 -j ACCEPT $IPT -t filter -A INPUT -i $WAN -p tcp -j REJECT --reject-with tcp-reset $IPT -t filter -A INPUT -i $WAN -j REJECT --reject-with icmp-port-unreachable -$IPT -t filter -A FORWARD -m state --state INVALID -j DROP -$IPT -t filter -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT + $IPT -t filter -A FORWARD -i $WAN -m state --state NEW,INVALID -j DROP $IPT -t filter -A FORWARD -o $WAN -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu |