A Record (Cloudflare) pointing to EC2 instance not reachable

0

I have a subdomain that I want to point my EC2 instance. My instance is running a 3rd party software that requires HTTPS. I use Cloudflare for all my DNS routing and created an A Record to point to my EC2 IP address. I have no problems access it by IP, but fails when using the subdomain address (test.mydomain.com). Receiving an Error 520 message - Web server is returning an unknown error. I made sure that:

  • EC2 security group port 80/443 is open for both 0.0.0.0/0 and ::/0
  • Cloudflare SSL/TLS is set at Flexible

Not sure what I'm missing?

preguntada hace 2 años1173 visualizaciones
2 Respuestas
0

Hi.

Are you hosting a web server on EC2?
You should check the access log and error log of the web server. Then you should find the reason why Cloudflare responds with 520 error.

profile picture
EXPERTO
iwasa
respondido hace 2 años
0

Another troubleshooting step: Edit the hosts file on your PC and add test.mydomain.com as an entry with the IP address of your instance. Then you will be able to see what the instance is returning. You can also do this with tools like curl and wget by setting the Host header in the request.

profile pictureAWS
EXPERTO
respondido hace 2 años

No has iniciado sesión. Iniciar sesión para publicar una respuesta.

Una buena respuesta responde claramente a la pregunta, proporciona comentarios constructivos y fomenta el crecimiento profesional en la persona que hace la pregunta.

Pautas para responder preguntas