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Top Forums Programming NodeMCU ESP8266 Blynk SSL Application for Linux Server Load Averages Post 303043605 by Neo on Saturday 1st of February 2020 11:18:45 PM
Old 02-02-2020
After looking into this, I found some promising iPhone apps which do not share your data with third parties and will test the mosquitto broker to set up a private pub/sub network to send and receive messages to and from these ESP8266 and ESP32 devices.

Quote:
Eclipse Mosquitto is an open source (EPL/EDL licensed) message broker that implements the MQTT protocol versions 5.0, 3.1.1 and 3.1. Mosquitto is lightweight and is suitable for use on all devices from low power single board computers to full servers.

The MQTT protocol provides a lightweight method of carrying out messaging using a publish/subscribe model. This makes it suitable for Internet of Things messaging such as with low power sensors or mobile devices such as phones, embedded computers or microcontrollers.

The Mosquitto project also provides a C library for implementing MQTT clients, and the very popular mosquitto_pub and mosquitto_sub command line MQTT clients.
I have already set up a mosquitto broker on Ubuntu, the basic security authentication and can send a message from my ESP32 device to the remote Linux server. Will discuss this in another post.
 

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Net::Server::Proto::SSL(3)				User Contributed Perl Documentation				Net::Server::Proto::SSL(3)

NAME
Net::Server::Proto::SSL - Net::Server SSL protocol. SYNOPSIS
See Net::Server::Proto. DESCRIPTION
Experimental. If anybody has any successes or ideas for improvment under SSL, please email <paul@seamons.com>. Protocol module for Net::Server. This module implements a secure socket layer over tcp (also known as SSL). See Net::Server::Proto. There is a limit inherent from using IO::Socket::SSL, namely that only one SSL connection can be maintained by Net::Server. However, Net::Server should also be able to maintain any number of TCP, UDP, or UNIX connections in addition to the one SSL connection. Additionally, getline support is very limited and writing directly to STDOUT will not work. This is entirely dependent upon the implementation of IO::Socket::SSL. getline may work but the client is not copied to STDOUT under SSL. It is suggested that clients sysread and syswrite to the client handle (located in $self->{server}->{client} or passed to the process_request subroutine as the first argument). PARAMETERS
In addition to the normal Net::Server parameters, any of the SSL parameters from IO::Socket::SSL may also be specified. See IO::Socket::SSL for information on setting this up. BUGS
Christopher A Bongaarts pointed out that if the SSL negotiation is slow then the server won't be accepting for that period of time (because the locking of accept is around both the socket accept and the SSL negotiation). This means that as it stands now the SSL implementation is susceptible to DOS attacks. To fix this will require deviding up the accept call a little bit more finely which may not yet be possible with IO::Socket::SSL. Any ideas or patches on this bug are welcome. LICENCE
Distributed under the same terms as Net::Server THANKS
Thanks to Vadim for pointing out the IO::Socket::SSL accept was returning objects blessed into the wrong class. perl v5.12.1 2007-02-03 Net::Server::Proto::SSL(3)
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