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Re: Some basic router questions and zoom

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On Thu, 17 Dec 2020 17:38:54 +0100, Pascal Hambourg wrote:
> Le 16/12/2020 à 16:54, Bit Twister a écrit :
>> 192.168.1     My basic hardware setup using two routers
>>     .------.      .-----------.    .----------.
>> .50 | wb   |------| lan router|----|isp router|--
>>     `------'      `-----------'    `----------'
>>     .------.        |  |  |
>> .60 | mtv  |--------'  |  | SIP   .-------.
>>     `------'           |  `-------| phone |
>>     .------.           |          `-------'
>> .70 | tb   |-----------'
>>     `------'
>>
>> Nodes using shorewall firewall running Mageia Release 7.1 Linux
>
> Including the routers ?

No, routers the ones a normal house hold internet user would buy.

>> Examples are two users on mtv and wb nodes doing the same activity
>> at the same time on my same internet address/connection.
>>
>> isp router configured to pass all ports to same ports in lan router.
>
> What do you mean exactly by "pass ports to same ports" ?

If you were to look in your router you might find a Port Forwarding
screen which allows you to configure what Wan ports are
to be forwarded to desired ip addresses on the Lan.



>> A simple example, Firefox open a bi-directional connection.
>
> What are you calling "bi-directional connection" ?
> I would say that any HTTP connection is bidirectional by nature, as the
> client sends requests and the server sends replies.

Yup, you and I are on the same page about that definition.

>
>> If wb and mtv user run firefox www.yahoo.com and click
>> Sign In, yahoo only sees my internet ip address.
>
> What are you calling "my internet ip address" ?

Just like any home user has an internet ip address.

>> How does the packet stream get back to the correct user?
>
> Using the destination address and port, as usual.

Me thinks you are looking through the wrong end of this conversation.

I understand routing from my node to some site on the internet.
David Hodgins's reply describes how the router knows which Lan ip
is to get the packet.

>> A complex example, zoom.us connects 8801, 8802 for the meeting.
>
> What do you mean by "connect 8801, 8802" ?

Picture/Audio from the meeting server is sent on ports 8801, 8802
after the server has made the connection with the Zoom client
running on your node.

>
>> I do not know how my router would know to route the incoming
>> request to the correct user.
>
> The router doesn't know anything about users. It just forwards the
> packet to the destination host. The destination host delivers the data
> to the destination socket and process.

Ok, I was using user as a pronoun for node and process/client.

>> The reason I ask, zoom uses these ports,
>>      TCP 80, 443 *.zoom.us
>>      TCP 443, 8801, 8802 MeetingConnector
>>      UDP 3478, 3479, 8801, 8802 MeetingConnector
>
> What is "MeetingConnector" ?

Term about the Zoom server which connects you to the desired meeting.

>> and if ports 8801, 8802 are the ports zoom.us wants to open for >> the meeting. How would the router know to route those packets >> to the correct node?
>
> What do you mean by "ports zoom.us wants to open" ?

Just what I said. Zoom is going to open/establish a connection to
my internet address to one or more of those ports.

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Thread

Some basic router questions and zoom Bit Twister <BitTwister@mouse-potato.com> - 2020-12-16 09:54 -0600
  Re: Some basic router questions and zoom "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2020-12-16 12:57 -0500
  Re: Some basic router questions and zoom Pascal Hambourg <pascal@plouf.fr.eu.org> - 2020-12-17 17:38 +0100
    Re: Some basic router questions and zoom Bit Twister <BitTwister@mouse-potato.com> - 2020-12-17 11:55 -0600
      Re: Some basic router questions and zoom William Unruh <unruh@invalid.ca> - 2020-12-17 18:50 +0000
        Re: Some basic router questions and zoom Bit Twister <BitTwister@mouse-potato.com> - 2020-12-17 15:07 -0600
          Re: Some basic router questions and zoom William Unruh <unruh@invalid.ca> - 2020-12-17 22:49 +0000
            Re: Some basic router questions and zoom Bit Twister <BitTwister@mouse-potato.com> - 2020-12-17 17:14 -0600
              Re: Some basic router questions and zoom William Unruh <unruh@invalid.ca> - 2020-12-18 00:04 +0000
                Re: Some basic router questions and zoom "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2020-12-17 19:54 -0500
                Re: Some basic router questions and zoom Bit Twister <BitTwister@mouse-potato.com> - 2020-12-17 19:35 -0600
                Re: Some basic router questions and zoom Dick <rsutton43@comcast.net> - 2020-12-18 09:58 -0500
                Re: Some basic router questions and zoom Dick <rsutton43@comcast.net> - 2020-12-18 10:06 -0500
            Re: Some basic router questions and zoom Johann Beretta <beretta@nun-ya-bizness.com> - 2020-12-21 10:19 -0800

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