Author: Arturo

Level: Medium

Description: There is a Python WSGI web application file at /home/admin/wsgi.py , the purpose of which is to serve the string “Hello, world!”. This file is served by a Gunicorn server which is fronted by an nginx server (both servers managed by systemd).

So the flow of an HTTP request is: Web Client (curl) – Nginx – Gunicorn – wsgi.py . The objective is to be able to curl the localhost (on default port :80) and get back “Hello, world!”, using the current setup.

Yyyyy la verdad tuve que mirar las pistas, nunca me imaginé que el problema era la aplicación
Tampoco estaba TAN errado en el fix

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Type: Fix
Description: There is a Python WSGI web application file at /home/admin/wsgi.py , the purpose of which is to serve the string “Hello, world!”.
This file is served by a Gunicorn server which is fronted by an nginx server (both servers managed by systemd).
So the flow of an HTTP request is: Web Client (curl) – Nginx – Gunicorn – wsgi.py.
The objective is to be able to curl the localhost (on default port :80) and get back “Hello, world!”, using the current setup.

Efectivamente este desafío me superó y no pude en el primer intento, vamos por otra oportunidad

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Level: Medium

Type: Fix

Access: Email

Description: The file /home/admin/somefile is open for writing by some process. Close this file without killing the process.

Personalmente me superó – pero nada que no se pueda investigar un poco – estaba casi casi en lo cierto 😀

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Level: Medium

Description: Try and figure out if you are inside a container (like a Docker one for example) or inside a Virtual Machine (like in the other scenarios).

Explorando diferentes maneras de chequear si estamos en un contenedor, honestamente muchas no las conocía

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Level: Medium

Description: There’s a “dockerized” Node.js web application in the /home/admin/app directory. Create a Docker container so you get a web app on port :8888 and can curl to it. For the solution to be valid, there should be only one running Docker container.

Muy divertido en mi caso, toco Docker de oído pero nada que no se pueda solucionar con un poco de Google y sentido común

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Level: Medium

Type: Fix

Access: Public

Description: There’s a web server serving a file /var/www/html/index.html with content “hello sadserver” but when we try to check it locally with an HTTP client like curl 127.0.0.1:80, nothing is returned. This scenario is not about the particular web server configuration and you only need to have general knowledge about how web servers work.

No logré terminarlo en este intento pero creo que estamos cerca !!

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Level: Medium

Type: Fix

Access: Public

Description: There’s an Nginx web server installed and managed by systemd. Running curl -I 127.0.0.1:80 returns curl: (7) Failed to connect to localhost port 80: Connection refused , fix it so when you curl you get the default Nginx page.

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Level: Medium

Type: Fix

Access: Public

Description: There’s a web server serving a file /var/www/html/index.html with content “hello sadserver” but when we try to check it locally with an HTTP client like curl 127.0.0.1:80, nothing is returned. This scenario is not about the particular web server configuration and you only need to have general knowledge about how web servers work.

Al fin de cuentas no estaba tan lejos de la solución!
De paso aprendemos bien la sintaxis de iptables

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