How to fix err_ssl_version_or_cipher_mismatch error?

In this guide, err_ssl_version_or_cipher_mismatch: How khổng lồ solve it, we’ll see what the err_ssl_version_or_cipher_mismatch error is and how lớn fix it so you can access the site again.

Bạn đang xem: How to fix err_ssl_version_or_cipher_mismatch error?

First, let’s see what the error looks lượt thích on different browsers & then we’ll see the main causes of this problem. Finally, we’ll see the various ways lớn solve the error both if it is occurring on your site and while browsing, by analyzing the server-side và client-side problems one by one.

What is the err_ssl_version _or _cipher_mismatch error?How to lớn fix the err_ssl_version_or_cipher_mismatch errorServer-side issuesClient-side issues

What is the err_ssl_version _or _cipher_mismatch error?

Whenever we access a website using the HTTPS protocol, the browser must contact the server. The exchange of messages between the client (the browser) and the vps is called an SSL/TLS handshake.

These communications between the browser và server also include the browser’s verification of the SSL certificate. The SSL certificate kiểm tra is performed every time we connect to a website và serves khổng lồ ensure that the connection to lớn that site is secure.

If during the TLS handshake the browser detects an unsupported version of the SSL protocol or problems with configuration and encryption, an error message, err_ssl_version_or_cipher_mismatch may appear.

Since this is an error related to SSL certificate verification, this issue can only occur on sites that use the HTTPS protocol & security certificates. Please cảnh báo that most sites have adopted the new security protocol by migrating from HTTP to HTTPS.

Variants of the err_ssl_version_or_cipher_mismatch

An error page appears on Chrome with a warning “The site cannot provide a secure connection”. Below you can see what the err_ssl_version_or_cipher_mismatch error looks lượt thích on Chrome.

The same error message appears using Microsoft Edge, with a warning “The connection for this site is not secure“.

On the other hand, if you visit the same site with Firefox you may encounter a similar error, but with a slightly different warning. A “Secure connection failed” error will appear on Firefox with the error code: ssl_error_no_cypher_overlap.

In all cases, it is not possible to continue browsing & you can’t accesss the site.

Err_ssl_version_or_cipher_mismatch: the causes of the error

The error err_ssl_version_or_cipher_mismatch is due in most cases to lớn the use of obsolete or outdated browsers or operating systems.

However there are also other reasons why this error message may appear, here is a menu of the most common ones.

Outdated browsers or operating systems: in this case, the problem occurs because the browser or operating system does not tư vấn the latest version of TLS.Problems with the QUIC protocol.TLS version: the error may occur if the TLS version in use on the server is no longer supported by the browser.Problems with cache, antivirus or CDN.

How to lớn fix the err_ssl_version_or_cipher_mismatch error

The err_ssl_version_or_cipher_mismatch error may depend on server-side issues such as outdated TLS versions or certificate issues, or it could be a client-side error that depends on the browser or operating system you are using.

Xem thêm: Cách Tải Và Cài Đặt Driver Card Mạng Cho Win 7, Xp, 8 Tự Động Với 3Dp Net

Server-side issues

The err_ssl_version_or_cipher_mismatch error can be caused mainly by these three issues:

domain name mismatch in the certificateserver using a TLS version that is no longer supportedserver using an encryption that is no longer supported.

Let’s examine in each case how khổng lồ understand if the error is caused by one of these problems and what to vì to solve it.

Check the SSL certificate, TLS version and encryption

If the err_ssl_version_or_cipher_mismatch error is occurring on your site, the first thing to vị is to lớn make sure that the SSL certificate of the site is valid.

As we mentioned earlier talking about the causes of the error, one of the reasons why this warning may appear is because of problems with the SSL certificate.

There are several methods you can follow to check the SSL certificate, one of the easiest ways is to bởi a kiểm tra with a không lấy phí online tool like the SSL Server thử nghiệm from Qualys SSL Labs.

The tool is very easy lớn use and allows you to identify problems with your SSL certificate, such as figuring out if it is expired, invalid, or contains errors.

Connect khổng lồ the tool’s site và enter the tên miền of the site where the error appears to lớn perform an SSL certificate check, then click Submit.

Let’s see what errors are identified by the tool & can help guide us on the right path to correct the err_ssl_version_or_cipher_mismatch error.

Mismatch error

One of the problems that can occur with the SSL certificate và can generate the err_ssl_version_or_cipher_mismatch error is when there is no match between the tên miền name in the certificate and the domain.

In this case when we go lớn analyze the SSL certificate of the site, the SSL Labs tool will warn us about the mismatch through this warning message “Certificate name mismatch“.

Together with the mismatch error on the certificate, the tool also lists the possible causes of such an error. The mismatch may, in fact, depend on these reasons:

The analyzed site does not use the SSL protocol but shares the IP address with another site that does.The site no longer exists, for example the domain points to lớn an old IP address on which a different site is now hosted.The site is using a CDN that does not tư vấn SSL.The alias used for the domain has not been included in the certificate.

Remember that this last eventuality can occur also for variants with & without www. For example, if the domain name in the certificate is “” and the visited domain is “”.

You can also kiểm tra which domain name names the certificate is valid for by viewing the details directly from your browser.

To vì this click on the icon next to lớn the address as shown in this screenshot và then click on Certificate.

Chuyên mục: Domain Hosting