This article explains what to do if a certificate warning appears when accessing the CS141 web interface, for example NET::ERR_CERT_DATE_INVALID or “Certificate is no longer valid/current”.

Note:

This issue should already be fixed with firmware version 2.32. 

Problem

When accessing the CS141 web interface via HTTPS, the browser blocks access or shows a warning, e.g.:

• NET::ERR_CERT_DATE_INVALID

• “The web certificate is no longer valid/current”

Cause

The CS141 web server factory default certificate has not been renewed for a long time. This typically happens if no update (including a reset to factory settings) has been performed for an extended period.

Solution

Step 1: Download the new certificate (server.pem)

Download the current PEM file:

• server.pem

You can download the file at the end of this article.

Step 2: Upload server.pem to the CS141

1. Open the CS141 web interface.

2. Navigate to System > Web server.

3. Upload server.pem (file selection or drag and drop, depending on the interface).

4. Confirm the upload.

Step 3: Browser check

1. Reload the page (clear the browser cache if necessary).

2. Check whether the warning is gone.

3. If a warning still appears: Open the certificate details in the browser and check the validity date.

Note:
You can find more information on creating a certificate with key yourself in the following article: Creating a certificate and key