[ZBX-24961] Web Scenarios with SSL Connect Error and HTTP/2 Compatibility Created: 2024 Aug 02  Updated: 2025 Jul 10  Resolved: 2025 Jul 10

Status: Closed
Project: ZABBIX BUGS AND ISSUES
Component/s: Proxy (P), Server (S)
Affects Version/s: 6.0.31
Fix Version/s: None

Type: Problem report Priority: Trivial
Reporter: Shuang Fu Assignee: Arkadiusz Zyla (Inactive)
Resolution: Won't Do Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Attachments: PNG File curl_http1.1_error.png     PNG File curl_http2_ok.png     JPEG File lastest_data_error_msg.jpeg    

 Description   

I have created new Web scenarios for web monitoring, and got web problem alerts. 
However, the web service is actually available.

The latest data shows the following error message:

SSL connect error: error:14094460: SSL routines: ssl3_read_bytes:reason(1120)

On proxy server, the `curl` command using the `--http1.1` option produces the same error. 

When using the `--http2` option with `curl`, it returns successfully.

Could you please confirm whether "Zabbix Web scenarios" / "http agent" are limited to HTTP/1.1 support? 
If HTTP/2 protocol is supported, what additional configurations are required?

Many Thanks!



 Comments   
Comment by Arkadiusz Zyla (Inactive) [ 2025 Jul 10 ]

Unless you’re using external scripts with curl --http2 or similar, Zabbix does not support HTTP/2 for Web Scenarios or HTTP Agent items, and there's no setting in the frontend/API to enable it.

Please be advised that this section of the tracker is for bug reports only. The case you have submitted can not be qualified as one, so please reach out to [email protected] for commercial support (https://zabbix.com/support) or consultancy services. Alternatively, you can also use our community channels (https://www.zabbix.com/community) for assistance. With that said, we are closing this ticket. Thank you for understanding. 

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