'cURL same server from a inside docker container

I saw a lot of similar problem but not exactly like mine... I have a classic architecture,

A server with docker, a stack with Traefik to dispatch request, and few stack of nginx/apache and php. Let's say

  • website1.com
  • website2.com

The problem is that I can't cURL another website from inside a docker container.

Architecture

If I try to curl from server itself

curl -v website2.com
curl -v https://website2.com

I get a valid response

If I try to curl from website1 container

curl -v website2.com
curl -v https://website2.com

I can see

Trying XX.XX.XX.XX:443...

With my external IP (so the DNS should be OK) but I don't get any response so it end with a timeout message.

If I add 192.168.48.4 website2.com into my /etc/hosts and I try to cURL, I get a valid response but tell me if I'm wrong but in this case it access through local and not from outside of the server

By the way, I need to cURL from a "manager" website that get all domains from an API, so cURL should be dynamic and I can't really add all IP manually into a hosts file or whatever

I really want to access other containers from outside, like an external service

Do you have any suggestion ? Thank you guys

phpdockercurltraefik


Solution 1:[1]

Thanks for comment and specifically to this topic https://community.traefik.io/t/curl-from-container-a-to-b-blocked/1040/14

In my case, the firewall (ufw) of my host was "blocking" my http/https requests, even if my domains were accessible

Thoses commands fix my problem

sudo ufw allow http
sudo ufw allow https

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 D. Schreier

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