Error Code Portal
MicrosoftWindows WinHTTPError code

12030

ERROR_WINHTTP_CONNECTION_ERROR

Alternative forms: 0x00002EFE · 0x2EFE · ERROR_WINHTTP_CONNECTION_ERROR

What does this code mean?

Code 12030 · An issue reported by Windows WinHTTP.

Official explanation · Original text

The connection with the server has been reset or terminated, or an incompatible SSL protocol was encountered. For example, WinHTTP version 5.1 does not support SSL2 unless the client specifically enables it.

Troubleshooting and diagnostic links

First check that the document's product, version, and environment match your situation.

Source and terms of use

Error Messages (Winhttp.h) ↗

Creator: Microsoft and MicrosoftDocs contributors
License: Creative Commons Attribution 4.0 International
Checked on: 2026-11-12

Modifications: Extracted numeric codes, symbolic names and English message text; converted Markdown/HTML to plain text and normalized whitespace; added Korean product context, namespace labels, status classification and separately labeled official links. No machine translation of message text.

Source details · Original licenses and notices