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@@ -13,6 +13,12 @@ length=${#protocol[@]} # count protocol elements
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for i in `seq 0 9` # fix for android's annoyingly limited bash
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do
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# echo ${protocol[$i]} ${origin[$i]} ${destination[$i]} # debug
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+
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+ # delete previous rules to avoid duplicates
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+ iptables -t nat -D PREROUTING -p ${protocol[$i]} --dport ${origin[$i]} -j REDIRECT --to-ports ${destination[$i]}
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+ iptables -t nat -D OUTPUT -p ${protocol[$i]} --dport ${destination[$i]} -j REDIRECT --to-ports ${origin[$i]}
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+
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+ # add new rules
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iptables -t nat -A PREROUTING -p ${protocol[$i]} --dport ${origin[$i]} -j REDIRECT --to-ports ${destination[$i]}
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iptables -t nat -A OUTPUT -p ${protocol[$i]} --dport ${destination[$i]} -j REDIRECT --to-ports ${origin[$i]}
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done
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