Non Anonymous Onion Encryption and NAT Traversal
From Whonix
Not anonymous!
Documentation for this is incomplete. Contributions are happily considered!
Introduction[edit]
It is possible to make Tor on a server using a single Tor hop (only one Tor relay instead of three) by using Tor configuration options HiddenServiceNonAnonymousMode 1, HiddenServiceSingleHopMode 1. This is non-anonymous but faster. Server should use Onions Services Authentication. The advantage of this is to have a server which is:
- reachable (for users having access to Tor) for NAT traversal, i.e. it works behind common NAT routers.
- capable to secure inherently insecure protocols (such as VNC) by using the encryption / authentication provided by Tor Onion Services
Independently, if clients prefer speed over anonymity, they can configure Tor in Tor2Web mode, which means outgoing Tor circuits will have a length of one rather than three.
These two options combined reduce a 6 hop Tor connection to a 2 hop Tor connection. It's not anonymous, but providing NAT traversal as well as onion encryption / authentication.
https://forums.whonix.org/t/should-we-use-hiddenservicesinglehopmode-for-whonix-org-server [archive]
Server Side[edit]
Open /usr/local/etc/torrc.d/50_user.conf.
If you are using Qubes-Whonix ™, complete the following steps.
Qubes App Launcher (blue/grey "Q") → Whonix-Gateway ™ ProxyVM (commonly named sys-whonix) → Tor User Config (Torrc)
If you are using a graphical Whonix-Gateway ™, complete the following steps.
Start Menu → Applications → Settings → /usr/local/etc/torrc.d/50_user.conf
If you are using a terminal-only Whonix-Gateway ™, complete the following steps.
sudo nano /usr/local/etc/torrc.d/50_user.conf
Add.
HiddenServiceNonAnonymousMode 1 HiddenServiceSingleHopMode 1 SocksPort 0 HiddenServiceDir /var/lib/tor/hidden_service/ HiddenServicePort 22 127.0.0.1:22 HiddenServicePort 5900 127.0.0.1:5900 HiddenServiceVersion 3 ## syntax: ## HiddenServiceAuthorizeClient auth-type client-name,client-name,… ## The auth-type can either be 'basic' for a general-purpose authorization protocol or 'stealth' for a less scalable protocol that also hides service activity from unauthorized clients. ## Valid client names are 1 to 16 characters long and only use characters in A-Za-z0-9+-_ (no spaces). HiddenServiceAuthorizeClient stealth 1234567890123456
Save and exit.
Client Side[edit]
Update the package lists.
sudo apt-get update
Install Tor's build dependencies.
sudo apt-get build-dep tor
Create directory ~/tor-src.
mkdir ~/tor-src
Change directory to ~/tor-src.
cd tor-src
Download the Tor source package.
apt-get source tor
Change directory to Tor source directory.
cd tor-*/
Open debian/rules in an editor as a regular, non-root user.
If you are using a graphical environment, run.
mousepad debian/rules
If you are using a terminal, run.
nano debian/rules
Change:
dh_auto_configure \
$(confflags) \
--prefix=/usr \
--mandir=\$${prefix}/share/man \
--infodir=\$${prefix}/share/info \
--localstatedir=/var \
--sysconfdir=/etc \
--disable-silent-rules \
--enable-gcc-warnings-advisory
To:
dh_auto_configure \
$(confflags) \
--prefix=/usr \
--mandir=\$${prefix}/share/man \
--infodir=\$${prefix}/share/info \
--localstatedir=/var \
--sysconfdir=/etc \
--disable-silent-rules \
--enable-gcc-warnings-advisory \
--enable-tor2web-mode
Open src/or/config.c in an editor as a regular, non-root user.
If you are using a graphical environment, run.
mousepad src/or/config.c
If you are using a terminal, run.
nano src/or/config.c
Change
V(Tor2webMode, BOOL, "0"),
To
V(Tor2webMode, BOOL, "1"),
Build the Tor package.
debuild
Footnotes[edit]
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