forked from freifunk-franken/firmware
bf9c42a24c
On a router wich is directly connected to the internet, there is lot of traffix on the WAN port. E.g. ssh bruteforces. That's like a DOS for a small device. This fixes #395 Signed-off-by: Tim Niemeyer <tim.niemeyer@mastersword.de>
51 lines
1.5 KiB
Bash
Executable File
51 lines
1.5 KiB
Bash
Executable File
#!/bin/sh
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#iptables -F
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#
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#iptables -P INPUT DROP
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#iptables -P OUTPUT DROP
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#iptables -P FORWARD DROP
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#
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#for proto in tcp udp
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#do
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# for port in 53 666 655
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# do
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# iptables -A OUTPUT -p $proto --dport $port -j ACCEPT
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# iptables -A OUTPUT -p $proto --sport $port -j ACCEPT
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# iptables -A INPUT -p $proto --dport $port -j ACCEPT
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# iptables -A INPUT -p $proto --sport $port -j ACCEPT
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# done
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#done
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#
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#iptables -A OUTPUT -p icmp -j ACCEPT
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#iptables -A INPUT -p icmp -j ACCEPT
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#
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#iptables -A INPUT -p tcp --dport 22 -j ACCEPT
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#iptables -A OUTPUT -p tcp --sport 22 -j ACCEPT
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#
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#
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#iptables -A OUTPUT -p tcp --sport 1024: -j ACCEPT
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#iptables -A OUTPUT -p udp --sport 1024: -j ACCEPT
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# mastersword.de
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#iptables -A OUTPUT -p tcp -d 78.46.215.78 -j ACCEPT
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#iptables -A INPUT -p tcp -s 78.46.215.78 -j ACCEPT
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# gw1.freifunk-ol.de
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#iptables -A OUTPUT -p tcp -d 178.33.33.102 -j ACCEPT
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#iptables -A INPUT -p tcp -s 178.33.33.102 -j ACCEPT
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# freifunk-ol.de
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#iptables -A OUTPUT -p tcp -d 178.33.33.208 -j ACCEPT
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#iptables -A INPUT -p tcp -s 178.33.33.208 -j ACCEPT
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#Masquerade interface for gateway
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#iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
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#solves MTU problem with bad ISP´s
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iptables -A FORWARD -p tcp -m tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
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# Wenn ein router direkt am Netz hängt, ist er auch ssh Angriffen ausgesetzt.
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# Das wirkt bei kleinen Geräten wir ein DOS
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iptables -I INPUT -i eth0.2 -m state --state RELATED,ESTABLISHED -j ACCEPT
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iptables -I INPUT -i eth0.2 -j DROP
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