Take a look at example f.) -> https://elrippoisland.net/public/how_to/anonymity.html > Hello again :) > > At https://ruggedinbox.com we are running a 'standard' email server, > using postfix, dovecot, and so on .. > > The server is also able to receive and send emails to the onionland, > thanks to Tor providing DNS resolution for onion addresses and 'unbound' > for the clearnet. > > As you may know, the full setup needs some iptables magic, as documented > in: > https://trac.torproject.org/projects/tor/wiki/doc/TransparentProxy > https://lists.torproject.org/pipermail/tor-talk/2014-March/032503.html > https://lists.torproject.org/pipermail/tor-talk/2014-March/032507.html > > so we run the following rules: > 1. iptables -t nat -A OUTPUT -p tcp -d 10.192.0.0/10 -j REDIRECT > --to-ports 9040 > 2. iptables -A OUTPUT -m conntrack --ctstate INVALID -j DROP > 3. iptables -A OUTPUT ! -o lo ! -d 127.0.0.1 ! -s 127.0.0.1 -p tcp -m > tcp --tcp-flags ACK,FIN ACK,FIN -j DROP > 4. iptables -A OUTPUT ! -o lo ! -d 127.0.0.1 ! -s 127.0.0.1 -p tcp -m > tcp --tcp-flags ACK,RST ACK,RST -j DROP > > but it looks like the third rule breaks connections: the mail client > timeouts while checking POP mailboxes, randomly but very often. > > > Do you think that is safe to discard the third and forth rules ? > And if not, do you have other suggestions to be safe and prevent leaks ? > > > Thank you very much for supporting, > we look forward to publish all ruggedinbox's configuration as soon as > everything works ok > (and perhaps a 'ruggedinbox distro') > in order to have a starting base on which discuss and request for > comments, > which will help people to build their private email server, secure, > spam-resistant and Tor-aware :) -- We don't bubble you, we don't spoof you ;) Keep your data encrypted! 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