howsmyssl | The web app running howsmyssl.com
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QUESTION
i am trying to write a piece of code in which the ESP32 connect securely to my api-server and post some sensor data. For this i use the WifiClientSecure library.
Through trial and error i have found out that client.connect(www.myserver.com, 443);
works.
But client.connect(www.myserver.com/api, 443);
will throw an error.
I have searched the internet for a solution but can't manage to find one.
Full code:
...ANSWER
Answered 2021-Dec-11 at 20:11www.server.com/api
is a partial URL. The complete URL will be https://www.server.com/api
,
where:
https
- This part is called scheme or protocol. HTTPS implies a default TCP port 443 (http mean port 80 by default)www.server.com
- The domain part, can be called also server address.api
- This is a path on the server
WiFiClient
, or WiFiClientSecure
, is the TCP client, it doesn't know anything about URLs. TCP client recognizes just address, given in form of IP address (192.168.1.20) or FQDN (which is then translated into IP address).
It is easier to use HTTPClient for requesting HTTP resources.
edit: FNDQ->FQDN
QUESTION
I am facing this strange issue in production. While making remote https request to APIM, following error is thrown:
...ANSWER
Answered 2021-Sep-23 at 15:41Root cause of the problem was the wrong IP Address configured in private DNS zone. We had two private DNS zone to resolve custom domain name of APIM, one was pointing to QA's APIM and other one pointing to PROD's APIM. We shouldn't have two private DNS zone in the first place and having wrong IP address was terrible mistake :(. Lesson learnt
QUESTION
I recently updated a django api from 2.2 to 3.1. I updated the dockerfile and related bash files like django-cookiecutter did https://github.com/pydanny/cookiecutter-django/commit/b22045bcd4ebf563ccdcf226fb389a6bb71e2654#diff-1872e6a6f0bbcb27f2eda185ac89eed05eb7a402b298e58bcbef29bf039c2c13
The upgrade mostly went well except now in production we cannot send email. I have a minimal management command I run in production to test email settings
...ANSWER
Answered 2021-Apr-04 at 14:06So in short, it's very likely your mail server only supports TLS 1.1 or even only TLS 1.0 and the slim-buster image no longer has support for those protocols.
Going back to 3.7-alpine (which is known working combination) or an older ubuntu/debian version which still supports those protocols will allow you to send mail again.
Then you should upgrade your mail server, cause both TLS 1.0 and TLS 1.1 should have died long ago.
Edit:
Another way to test your mailserver is to use openssl's s_client
command:
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