Moved docs section contributed by @4c3e

docs/source/gettingstartedfast.rst

@@ -71,6 +71,62 @@ you want more information, you can read the :ref:`Building Networks<networks-mai
 and :ref:`Interfaces<interfaces-main>` chapters of this manual.
 
 
+Bridging Over the Internet
+=============================================
+Reticulum currently offers two interfaces for connecting nodes over the internet: 
+`TCP <https://markqvist.github.io/Reticulum/manual/interfaces.html#tcp-server-interface>`_ and `I2P <https://markqvist.github.io/Reticulum/manual/interfaces.html#i2p-interface>`_. Each interface offers a different set of features, and Reticulum 
+users should carefully choose the interface which best suites their needs. 
+
+The ``TCPServerInterface`` allows users to host a node accessible over TCP/IP. This
+method is generally faster, lower latency, and more energy efficient than using ``I2PInterface``,
+however it leaks considerable metadata about the server host.
+
+Direct TCP client connections are able to see your node's IP address and may be able
+to use this information to determine your location or identity. Adversaries 
+inspecting your network's internet packets may be able to record packet metadata 
+like time of transmission and packet size. By default TCP does not encrypt traffic,
+so an adversary may be able to use packet inspection to learn that a system is running
+Reticulum, and what other IP adresses connect to it. Hosting a node via TCP server also
+requires a public IP address.
+
+The ``I2PInterface`` routes messages through the `Invisible Internet Protocol 
+(I2P) <https://geti2p.net/en/>`_. To properly use this interface, users must also run an I2P daemon in
+parallel to ``rnsd``. For always-on nodes it is recommended to use `i2pd <https://i2pd.website/>`_ because it
+generally runs more efficiently. 
+
+By default, I2P will fully encrypt all traffic sent over the network, and 
+obfuscate both the sender's and receiver's IP addresses. Running an I2P node 
+will also relay other I2P user's encrypted packets, which will use extra
+bandwidth and compute power, but also makes timing attacks and other forms of 
+deep-packet-inspection much more difficult. Similar to RNS, I2P uses cryptographic 
+public keys as destination addresses, which allows users to host nodes on non-static IPs.
+
+In general it is recommended to use an I2P node if you are hosting your node 
+publicly.
+
+There is a experimental public testnet you can join by adding the following
+interfaces to your ``.reticulum/config`` file:
+
+.. code::
+
+  # For connecting over TCP/IP:
+
+  [[RNS Testnet Frankfurt]]
+    type = TCPClientInterface
+    interface_enabled = yes
+    outgoing = True
+    target_host = frankfurt.rns.unsigned.io
+    target_port = 4965
+
+
+  # For connecting over I2P:
+
+  [[RNS Testnet I2P Node A]]
+    type = I2PInterface
+    interface_enabled = yes
+    peers = ykzlw5ujbaqc2xkec4cpvgyxj257wcrmmgkuxqmqcur7cq3w3lha.b32.i2p
+
+
 Develop a Program with Reticulum
 ===========================================
 If you want to develop programs that use Reticulum, the easiest way to get