Ssl error for telegram suddenly

checking12 · April 22, 2024, 10:40am

Somehow during the last few hours, telegram has stopped functioning for messages sourcing from HA.
error is

Error sending message: Unknown error in HTTP implementation: SSLCertVerificationError(1, "[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: Hostname mismatch, certificate is not valid for 'api.telegram.org'. (_ssl.c:1000)")

which seems pretty obvious, but validating the domain in a browser does pose a valid certificate and it has not been renewed recently.
Also, i use bot from other application which is still functioning.

currently i dont get it and not sure where to look for start to fix now. Anyone ideas?

tonicb · April 22, 2024, 11:18am

Same here, I have several errors since today. Telegram messages stopped working.

I am in Spain.

checking12 · April 22, 2024, 11:52am

for the sake of Geo location issues, where are you located? I’m in NL

derjoerg · April 22, 2024, 12:21pm

Same here.

I’m located in Germany

rabit9 · April 22, 2024, 12:26pm

Same Problem here (Luxemburg) 10 AM

Maboul · April 22, 2024, 12:45pm

same probleme from France.
start yesterday

checking12 · April 22, 2024, 12:54pm

thats interesting. Mine worked ok until this morning until around 10AM

rabit9 · April 22, 2024, 1:03pm

10AM me too…

four2six · April 22, 2024, 1:04pm

same here (Germany), last time it worked was yesterday 19:53 CEST, now it doesn’t.

Lokysek · April 22, 2024, 1:42pm

Same here (Czech republic)

tonicb · April 22, 2024, 3:37pm

I found that my AdGuard is blocking api.telegram.org:

After unblocking it telegram seems to work again.

Seems that api.telegram.org has been added in the adults list…

checking12 · April 22, 2024, 3:45pm

Nice spotted, will check that too. However the other app that uses telegram bot still sends messages. It might not go through add guard indeed that one.

four2six · April 22, 2024, 3:47pm

i can ping api.telegram.org just fine from my network

what is “the one” and what is “the other”?

tonicb · April 22, 2024, 3:55pm

After unblocking api.telegram.org I do not have any more errors in the logs and messages are sent without any problems.

Check also if you have any dns server ip that automatically filters urls like cloudflare families dns, maybe they are using same ip spam lists.

checking12 · April 22, 2024, 4:42pm

One is ha. Other is octobot
Ha runs in vm. Octo in docker

alejandro5x · April 22, 2024, 5:02pm

Same here. Panama
Is this normal?

Haaska · April 22, 2024, 5:42pm

Here the same error:

rabit9 · April 22, 2024, 5:55pm

Me too, works now

tonicb · April 22, 2024, 6:43pm

No, I have the same error if I do not allow it in adguard.

alejandro5x · April 22, 2024, 6:43pm

Now it it is working, the certificate was fixed