zapret/iptables.txt

For window size changing :

iptables -t raw -I PREROUTING -p tcp --sport 80 --tcp-flags SYN,ACK SYN,ACK -j NFQUEUE --queue-num 200 --queue-bypass
iptables -t raw -I PREROUTING -p tcp --sport 80 --tcp-flags SYN,ACK SYN,ACK -m set --match-set zapret src -j NFQUEUE --queue-num 200 --queue-bypass

For outgoing data manipulation ("Host:" case changing) :

iptables -t mangle -I POSTROUTING -p tcp --dport 80 -j NFQUEUE --queue-num 200 --queue-bypass
iptables -t mangle -I POSTROUTING -p tcp --dport 80 -m set --match-set zapret dst -j NFQUEUE --queue-num 200 --queue-bypass
iptables -t mangle -I POSTROUTING -p tcp --dport 80 -m set --match-set zapret dst -m connbytes --connbytes-dir=original --connbytes-mode=packets --connbytes 1:5 -j NFQUEUE --queue-num 200 --queue-bypass


For TPROXY :

sysctl -w net.ipv4.ip_forward=1
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

ip -f inet rule add fwmark 1 lookup 100
ip -f inet route add local default dev lo table 100
# prevent loop
iptables  -t filter -I INPUT -p tcp --dport 1188  -j REJECT
iptables  -t mangle -A PREROUTING -i eth1 -p tcp --dport 80 -j MARK --set-mark 1
iptables  -t mangle -A PREROUTING -i eth1 -p tcp --dport 80 -j TPROXY --tproxy-mark 0x1/0x1 --on-port 1188

iptables  -t mangle -A PREROUTING -i eth1 -p tcp --dport 80 -m set --match-set zapret dst -j MARK --set-mark 1
iptables  -t mangle -A PREROUTING -i eth1 -p tcp --dport 80 -m mark --mark 0x1/0x1 -j TPROXY --tproxy-mark 0x1/0x1 --on-port 1188

For DNAT :

# run tpws as user "tpws". its required to avoid loops.
sysctl -w net.ipv4.conf.eth1.route_localnet=1
iptables -t nat -I PREROUTING -p tcp --dport 80 -j DNAT --to 127.0.0.1:1188
iptables -t nat -I OUTPUT -p tcp --dport 80 -m owner ! --uid-owner tpws -j DNAT --to 127.0.0.1:1188