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I installed a Kubernetes cluster of three nodes, the control node looked ok, when I tried to join the other two nodes the status for both of is: Not Ready

On control node:

I have the minikube environment as the following: -

• Host OS: CentOS Linux release 7.7.1908 (Core)
• Docker: Docker Engine - Community 20.10.7
• minikube: minikube version: v1.20.0

I would like to add some additional host mapping (5+ IP and name) to the /etc/hosts inside the minikube container. Then I use the minikube ssh to enter to the shell and try to echo "172.17.x.x my.some.host" >> /etc/hosts. There is an error as -bash: /etc/hosts: Permission denied since the user who login to this shell is a docker, not a root.

I also found that at the host machine there is a docker container named minikube running, by using the docker container ls. Even I can go to this container with root by using docker exec -it -u root minikube /bin/bash. I understand that it is a kind of tweak and may be a bad practice. Especially it is too much tasks.

Regarding to the docker and docker-compose which provides the --add-host and extra_hosts respectively to add hostname mappings, Does the minikube provide it? Is there any good practice to achieve this within the minikube and/or system administrator point-of-view good practice?

After echo 172.17.x.x my.some.host > ~/.minikube/files/etc/hosts and start the minikube, there are some error as the following: -

I'm trying to configure a simple network structure using Vagrant as depicted in the following figure:

As you can see I aim to simulate a hacker attack which goes from attacker through router and reaches victim, but that's not important for the problem I'm struggling with.

This is my Vagrantfile so far (VritualBox is used as provider):

Lately I have started implementing TLS for the sport as a fun project and I'm currently trying to self make and send locally a client hello TLS packet (a minimal one).

When observed via the loopback interface in Wireshark it appears as pure data instead of a tls layer with all of the various fields and after lots of trying I decided to ask here the following questions:

1. What's the difference between my self made packet and a real TLS client hello one?
2. How does Wireshark selectively makes one appear as a TLS layered instead of pure data, is there an identifier field in the packet that declares it as pure data or a TLS layered one?
3. How can I make my packet to appear as a client hello TLS packet instead of pure data?

Here is my server and client that send basically my c code output (remember that they are not made for real TLS handling but just to show the packet in Wireshark):

server.py

I have following situation:

Server 1: Windows server with email server. Server address pattern: mail.myservers.com

Server 2: Ubuntu 20 (fresh instal month ago) with lsws web server, without email server. Server address pattern: s2.myservers.com

Server 2 is used for hosting PHP apps. Few days ago I installed brand new wordpress web. Since server 2 is not having email server then sendmail is simply not working. All sites have to use workaround via SMTP server like wordpress uses PHPMailer.

Web hosted on server 2 using address pattern myproject.com. While I am trying to test SMTP from wordpress administration I am getting following error.

I have the following model in Loopback 3:

I have installed Loopback 4, and mounted my legacy Loopback 3 app into it as part of my migration - all good so far.

However my (swagger-ui shaped) explorer renders expanded by default - and there are a LOT of endpoints and services - making it very hard to find what I'm looking for.

My instinct tells me I should be able to add a configuration here in my application.ts - but I cannot find anything.

I'm trying to add a new organization to Fabric's v2.2 test-network. When I execute the command (on configUpdate.sh; env vars are correctly setup):

I have connected my RPi3 Tx and Rx pins together. I use the following code: