According to Tor's official website (<https://www.torproject.org/docs/tor-doc-relay.html.en>), to be a relay I only have to modify the 'torrc' file and add the following information:

 ORPort 443
    Exitpolicy reject \*: \*
    Nickname ididntedittheconfig
    ContactInfo human @ ...

Okay. ***First question:*** But can I configure the "ORPort" field with any other port? Port 443 is used for default HTTPS communications; So ***Second question***: does that mean that a person who is browsing by Tor on an HTTP web page (port 80 or 8080) will not be able to navigate through my relay?

***Third question:*** Adding these parameters to the 'torrc' file, will I be an intermediate node only? Because I suppose to be an exit node the Exitpolicy field has to be configured with ports too, right? Example: ExitPolicy accept: \*: 80, accept \*: 110 Or has this changed?

***Fourth question:*** This question is *extremely* curious. In an old example of the 'torrc' file (<https://svn.torproject.org/svn/tor/tags/tor-0_0_9_5/src/config/torrc.sample.in>) this was said:

**################ This section is just for servers #####################
NOTE: If you enable these, you should consider mailing your identity.
key fingerprint to the tor-ops, so we can add you to the list of
servers that clients will trust. See the README for details.**

In the example of the current 'torrc' file (<https://gitweb.torproject.org/tor.git/tree/src/config/torrc.sample.in>) this no longer appears. Why?

Also, in the Tor FAQ (<https://www.torproject.org/docs/faq.html.en>) there is a question that is NOT ACCESSIBLE. Specifically this question: "So I can just set a nickname and ORPort and join the network?"

However, on a non-torproject web page (<https://archive.li/K3iJY#selection-1815.0-1815.203>) this question still appears. And the answer is:

"Yes. But by default users will only use you for the middle hop of their circuits. To become more useful to the network, please send mail to the ops with your key fingerprint and contact information".

**So, the question:** To be an exit node, is it necessary to send an email to The Tor Project? I'm very confused...

***Fifth question:*** I have read that once the file 'torrc' has been modified, the directory authorities must vote and approve the node. Is this still so? And in that case, who votes that a node is valid or not? A human administrator? Automatic software?

Next topic: I have read that to be an entry guard, I have to meet some requirements. Well, here are ***two questions***:

***1.*** Does the first node (or entry guard) to the Tor network know the IP of the Tor client?
***2.*** I have read that to be an entry guard node it is necessary to have a good bandwidth and be a stable node. Who decides that I am prepared to be an input node? A human administrator, or software?

That's all by now. Thank you Tor Stacks volunteers. I'm learning a lot with you. 

(Please forget my English; English is not my mother tongue).