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README.md

8. Transparent Proxy with dnsmasq

Setup a redirect proxy and a dns server with glider

glider.conf

verbose=True
listen=redir://:1081
forward=http://forwarder1:8080,socks5://forwarder2:1080
forward=http://1.1.1.1:8080
dns=:5353
dnsserver=8.8.8.8:53
strategy=rr
checkinterval=30

Create a ipset manually

ipset create myset hash:net

Config dnsmasq

server=/example1.com/127.0.0.1#5353
ipset=/example1.com/myset
server=/example2.com/127.0.0.1#5353
ipset=/example2.com/myset
server=/example3.com/127.0.0.1#5353
ipset=/example4.com/myset

Config iptables on your linux gateway

iptables -t nat -I PREROUTING -p tcp -m set --match-set myset dst -j REDIRECT --to-ports 1081
#iptables -t nat -I OUTPUT -p tcp -m set --match-set myset dst -j REDIRECT --to-ports 1081

When client requests network, the whole process:

  1. all dns requests for domain example1.com will be forward to glider(:5353) by dnsmasq
  2. glider will forward dns requests to 8.8.8.8:53 in tcp via forwarders
  3. the resolved ip address will be added to ipset "myset" by dnsmasq
  4. all tcp requests to example1.com will be redirect to glider(:1081) by iptables
  5. glider then forward requests to example1.com via forwarders