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I am trying to setup a Tor Transparent Proxy and redirect all its traffic to eth1 which will act as gateway.

Network setup:

eth0 < public interface
tap0 192.168.56.1 < Tor interface
eth1 10.10.0.254  < Tor gateway interface

The idea behind it is to have tor working on tap0, then redirect all its traffic from tap0 to eth1. This is the bit I cannot get to work, I guess.

torrcs config

VirtualAddrNetworkIPv4 10.192.0.0/10
AutomapHostsSuffixes .onion,.exit
AutomapHostsOnResolve 1
TransPort 192.168.56.1:9040 IsolateClientAddr IsolateClientProtocol IsolateDestAddr IsolateDestPort
DNSPort 192.168.56.1:5353
Log notice file /var/log/tor/notices.log
Log info file /var/log/tor/info.log

iptables rules

iptables -I FORWARD 1 -i tap0 -o eth1 -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -I FORWARD 1 -i eth1 -o tap0 -j ACCEPT
iptables -t nat -A PREROUTING -i tap0 -p udp --dport 53 -j REDIRECT --to-ports 5353 
iptables -t nat -A PREROUTING -i tap0 -p tcp --syn -j REDIRECT --to-ports 9040
iptables -t nat -I POSTROUTING 1 -o tap0 -j MASQUERADE

Tor bootstraps fine, but I cannot get internet connection from neither tap0 nor eth1. I feel the issue may be with my iptables rules, but I am really not sure anymore.

torgw:~$ curl --interface tap0 ifconfig.me
curl: (7) Failed to connect to ifconfig.me port 80 after 3155 ms: Couldn't connect to server
torgw:~$ curl --interface eth1 ifconfig.me
curl: (7) Failed to connect to ifconfig.me port 80 after 3134 ms: Couldn't connect to server
torgw:~$ 

Any idea? Thanks

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