Hi elrippo thanks for the inputs.Your implementation is good (in our opinion) because you block everything (INPUT DROP) and then allow only the strict necessary. We'll take your path, it will require some testing on a test server because you know what happens when you cut yourself out of the server with iptables .. :)
or block the entire service because of a mistyped rule :) Wish you a nice sunday, RuggedInbox team On 2014-08-23 18:43, elrippo wrote:
Take a look at example f.) -> https://elrippoisland.net/public/how_to/anonymity.htmlHello 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 documentedin: 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! Log you soon, your Admin elrippo@xxxxxxxxxxxxxxxxx Encrypted messages are welcome. 0x84DF1F7E6AE03644 -----BEGIN PGP PUBLIC KEY BLOCK----- Version: GnuPG v1.4.11 (GNU/Linux) mQINBFH797MBEAC0Y0NeI7lmDR9szTEcWuHuRe0r/WjSRC0Nr5nXsghuMcxpJ3Dd BOBimi4hdMMK4iqPVMwNw6GpKYR3A9LHHjbYRXHUKrJmB+BaJVyzJXN5H6XvxTTb UfX+DaXAGJW/G+3cBB3qm/QaU8QGkBKfXq0DLTaTGPkGKxEAldj/8onGZhawdJs+ B92JrW+S2HDh15pIuXzSqe7eCcIOdvvwfWe0fJi2AraA7LYGpxP6GcC/b9JJpbq5 Y6DfE2Aun9ZK3iHqURyrms0Whbv1CgmUahL2MVYCsTsXwe0GwlAxxKvjXAiXuo+R 9wO5wsXvVVSVNqsk9Yqi+wYzdPKndTU0GyxSApQHroF+cxaZ8Lk0xloj18+LdCSs e5IiTSXH0MMsDdWWdHlrgk+bgDG+0Gu3ne4vMwGdKO7AhYgQW/ueMy4RnkG/nsV9 jry5BO4gGAI1Ij8KvqUzEnvJFGE3ptJogU+zazWWDUWmL3ecKb3aDRlJFnZ3kJ5h q8GolZVjpk99V+4B5WVRPXdej/p5J19tXycK/jdNmr4oC8NyUhIpe8xHELnfoB4z +rxiTx+KMnW0rY8EQg8O2ixEYt5my90IwQkxcxIxextVrqjJjYn8extc2/v8yGzI KmTEJxdADB5v/Jx4HiLHNDSfBUb8gfONCkNSTYvTcSwTjWzHOkXeE/9ZbQARAQAB tD5lbHJpcHBvIChrZWVwIHlvdXIgZGF0YSBlbmNyeXB0ZWQpIDxlbHJpcHBvQGVs cmlwcG9pc2xhbmQubmV0PokCOAQTAQIAIgUCUfv3swIbLwYLCQgHAwIGFQgCCQoL BBYCAwECHgECF4AACgkQhN8ffmrgNkT8+BAAoAXBqu4/O2Cs5FSWWZpzgScNEgq7 uHhOKeYmRfgKlOUPoYlPB1DBqdOAXSKb9OvsmyOvpoGnqijB7aAJBoyQYW/OCQgd U8L4eTCf4yRZnfFLdgskcPfN1p0Rs/yinGEooBJFtYa7mT6J0UTW2JjCLZK2AFCW oF+KBu5JICXGBXigb2ZbX1jWjxP5H1RidQw6HF5z4z34SjLWAOOeZ8B/Xfz6Fs0s IAuLu2O4HE4DI8Qu196LhSVHHgr3uMTkvN1t5nKwyjrRQztwXXk9qIomII3ydNYb BYAGdWNNMfLb1kmDwC5wQHAFvSP1aiMF3aKAY+gl2wXSGO6JqM0SteJS3dytIljI kzu0atc9HuGs/HDQgdmpAS4WU2YefEr/WieltSiAKlwuC+3wg+CONJ6TE1vgNDU/ axerttb0jq7UQb/nAp05bsrB7XH1Vs+1ON9lUPEfWRmwQcrVK5JUrUWa/4tA/UeM XvFcPFtFluGTlLewgJIqcvjPXFwpbDZprXJsMkwew/A6B6n3+0sbgf7p3QSGkVbi dwQAymTbHdYqLnbcnKZhjto3Wjw1J5QB2wuiRYlpjV3i7AWTGlqoSTOWCCV+HamQ qeFYNYAWNFx3+J/oi7xDi8t9bHVNA205equ+y2sj3G5uGJ6LSHQ8AXp9uOipUUvU 1MJN0yLXr9PIwvi5Ag0EUfv3swEQAL0+MnxHGrTjSYdfdua4SBpmytDONM1EngeY s+WyaC/760MughKbaysI/nK2LB1vnwEY7f3NM4fxBx8u2T7VBm6Ez6Fs23Bb8Rkz f97bPSdxCmg64GPHfLA9uwTIXcYS+MpI86WOf6eWY0rRpf7Y9Nl7YoUNvzOyUPqc ggdcnHce8zYv7A/WS8flZDm8tVFPsHrQDEwNMws7ZhiNnHkeZeRJrvCuB7oEVich O/ROYoA5o6NozWYQbjxe1f6Yur4Q10qgVcxVnyLFJSbg6vZSzL7KYh3Z5iBOzPHt 7cwEDrW8W4Kl2Qj8rhJ4Wxs94CAtua7IXK44sVZWQbyHcOXRikgGMZKkEZzVCQa5 KD1u1ZrcBCyuMAir0hsmS3jhCUwpiE2c3SRk8O8CgixhTcBk0X/k9ZFu3Hbi1JMB FLzs/Nq3tYAYvVivhPloSxmYBPsafYHCZM83yBNNsralXh5zjB+di90G+AMXt2PN LTcdovZuWtC0s8/jrx+zv/AA4FAGYU9OVl+YL9ybFX8gSdMEcixyzQcKfiFBjpWv 5iFrwIuDlaXMcheyrhc9aGOxfx44OXc505+VjO/1Q/8EOWlJ6UwOi6GMkj5T+RFJ MDyP0UixS7dt6wTuD5t6PRuyWWxZswgrbL9hjwGFr154Z19TWeNWc23pWtUvQJos UCxl2nFHABEBAAGJBD4EGAECAAkFAlH797MCGy4CKQkQhN8ffmrgNkTBXSAEGQEC AAYFAlH797MACgkQJEPd69lQ0evA+Q/+M7lSFlrQWiRsFqDjh+kTJc+0OEBCvnfo N2KPyXXbfc//qup55PfEygE6C60zvrlv3WE33GZ5GS5MLuDMP82b+a5Yt16NQU7L WtAg1g0S0BvazW+28TgnfO8bhbGaFeE9ccw3xLmlbwZQ3f3LtMKdwFIROiG6hvAs 9U54QYti3tv9DowRYYWpdr0Ga8RqeGNtCKc0v2opy51MpzKWjwUW0i3XlSlyY8Lj 1KT8PyznNPw32nYpmDizz+0OUJNnn/kT+GnFoR3DJnFosTOrnxFJp+N+nejMp/gW r9NM0/E7H+P53IiytBOt5/0vsOaCFGdYGhKEjmJi3dHS4Xk1ObD1mjdD1YDOlWWU 3Md6BDHd4W7Q8gT7oQfTIMLd3HzV+WNPIdocPLBaeA/tRD8Pg5CCmncAmSub4F5T An7FlnACtSOv3cIWQ0TymS42DihDaJ5d1RvNzKw+zHYdPvf471JFZR3TDhkPbLIr 9czR7kbpnXRwchgwXQn306NVWf37TgA8wpbnFTazZ38iOeqcb9oKprqnbgEdr3PN OhKSlMTkzAqf3MEi2Fyua4BADMhS3oBwCRgDTlt6wquEytpNSlZaHnyiyIgOpekF Uy5K3w8NhHqeifRPrNb/UcCbXtXz+puqIEZHMenpv6FRlTTKpdoHoVXSkp1TPMGN /VaCiLbP4Z3xEw/9EbAJJkhmmx1Qw3ueoqc4h1MmhUtIdxSZ/oA9SjwlnY++zvaZ 6w1wTS4P+OUkETNDtItdpxXMJ9qfSy9voAQc2K43WMZCCmpPJYSdqaZZNPFj+Ne8 6FNtNKuUkXREybpHwlVAXnHzInmFOOM9RAmF70r3zEmKt77W1ztBLo2o9X79gPgL u9ThgrH6Oc2k46n+9nc3joccr7miiX/bp976DNWcWdOYThiSSOCb8Zw9/Zs935i1 wUVkYTj24tmBH4H5ov9ib7RPmU21ru458RbUKG0ONAqBtAHNyXHzUnXsrke+D4VW MI06YcXSk8YeYgQ8GxgHQc+W2bb8LIbKN1hEYJ0wzM62vKR2/Oiwuf8lXutIKTuz +v7Vj1PQd66DGHsxtWRaWnr1c54JTL2wICHJYKFH4grp7864+GL/uQ1O/Z/XxVku E1JQ/AnwBGU1M1S6otwWGWVRjzEzQtxsfcCEPvV/9td3FIFQAbGTPb+48XFU+TY9 8AlcXBlDzXq7c5f8Evn/oSIsZDt63K4HNTmMGqOTl/p1aA0e4eyX76LczY06rDP5 GMSNs+AHmYgZiS4RYhRUIvS9uLXMnnDAMYst0SDl2orDUUeHBTzu0rchyknBZMGP p5wQuWQ9CFlV+dj3UYbrBwC1lTkAMXRG2vlhA0V0TZqos7A5D4VHgSUQQjE= =otlL -----END PGP PUBLIC KEY BLOCK-----
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