Ssl_error_weak_server_ephemeral_dh

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Ssl_error_weak_server_ephemeral_dh_key Internet Explorer
Ssl_error_weak_server_ephemeral_dh_key Firefox Fix

This error can be returned by Firefox browser when your server presents a weak Diffie-Hellman key exchange. Recommendations to fix this are: Disable Export Cipher Suites. 刚开始使用Vmware将iso镜像挂载进入虚拟机，根目录下，使用命令加载：find / -name '.iso'一直查找不到镜像iso，存储的位置，不管怎么查找，都查找不到。.

Mozilla Firefox is one of the most used browsers, like Google Chrome. If you’re among those who rely on Firefox for most of their internet activity, then there’s a chance you might have faced some techie error messages while trying to visit a website. Some are common ones, and some are unheard and quite difficult to resolve. Among the pool of these errors, one is ssl_error_weak_server_ephemeral_dh_key.

If you’re facing this issue, then hold back, here we’ll give you a step-by-step guide on how to resolve this Mozilla Firefox error message: ssl_error_weak_server_ephemeral_dh_key. But, before we do that, let’s understand what exactly causes this error message.

What’s Firefox ssl_error_weak_server_ephemeral_dh_key Error Message?

This Mozilla Firefox error message ssl_error_weak_server_ephemeral_dh_key is called as the “Diffie Hellman error.” Generally, it occurs when the website you’re visiting has an out-dated security certificate, and some work has needed to be done on it.

This error message mostly occurs on those websites that use a self-signed SSL/TLS certificate. That said, due to recent updates, browsers don’t permit the use of a self-signed SSL certificate. Other than that, some of the common causes of this Diffie Hellman error message can be due to:

It’s quite rare. But if you’re using an out-dated Mozilla Firefox browser, especially the one in which bug was present Firefox 31, then it may cause this error message.

Ssl_error_weak_server_ephemeral_dh_key Internet Explorer

The Firefox 33 onwards the functionality of libPKIS has been stricter, which does not let anyone disable the library or switch towards NSS code. So, the website you’re visiting can show this error message – ssl_error_weak_server_ephemeral_dh_key.

Chances are null, but this was one of the reasons once – if the Key size of the security certificate is less than 1024 bits, then it won’t be entertained, and instead, Firefox above 33 will start showing this error message.

If your Mozilla Firefox blocks ciphers, then there’s a high chance that you may end up seeing this Diffie Hellman error message.

Apart from this, some other reasons due to which users can see this error message are:

The website you’re visiting is vulnerable to specific online attacks.
If the server is Tomcat and there’s no other secure server certificate.
Some websites likely keep their servers secured, and to access it, the secured server certificate is required.

A Step-by-step Guide to Fix Error ssl_error_weak_server_ephemeral_dh_key on Mozilla Firefox

Before we jump into the solutions, let’s do some of the basic checks to know whether it resolves the issue or not.

Sometimes it happens that this error is due to the old drivers into your browser. So, first, check and try to update with the latest ones, it may solve the issue. To update the driver,

Press Ctrl+Shit+A or
Click on Open Menu
And, go to Add-ons

Sometimes it has even been claimed that merely refreshing the browser can solve this error message. For refreshing your installed Firefox,

In your Mozilla Firefox menu, (Three Lines at Top Right Side), click “Help Menu.”

Select the option “Troubleshooting Information” from the list of “Help” and click “Refresh Firefox.”

If the issue is persisting, then follow the below solutions.

To resolve this Mozilla Firefox error message using this solution you need to open the hidden Firefox config menu and have to set the security.tls.insecure_fallback_hosts strings to the domain that’s displayed in error. For doing so, follow the below steps:

Go to your Mozilla Firefox browser and in the address bar type: “about:config”.

Proceed with Caution page will appear over there click on the checkbox “Warn me when I attempt to access these preferences” and then click “Accept the Risk and Continue” button, like below:

As you get to the config menu, paste: “security.tls.insecure_fallback_hosts” in the config menu’s search bar and press enter to get access to this string, which needs to be altered. Like below,

Now, double click on it, the blank Text box will open, in that type the domain name which is showing that error message and then click on the right icon next to it.

Now, restart your Firefox browser and verify whether the website is opening or still shows the same error message, if the error message is still persisting, then move to the next step.

It’s suggested to follow the below steps on every installation of Mozilla Firefox, which experience the issue.

Like the above step, again open the hidden config menu of the Mozilla Firefox browser.
Now,
1. Copy and paste: “security.ssl3.dhe_rsa_aes_128_sha” and change its preference from true to false.

2. Copy and paste: “security.ssl3.dhe_rsa_aes_256_sha” and change the preference by switching from true to false.

Usually, you won’t come across this Mozilla Error message ssl_error_weak_server_ephemeral_dh_key, but again there’s no surety. If you get this error, simply go through this guide and follow the mentioned steps.

Though some steps like opening a hidden config menu of the web browser may seem a bit new or techie to you, but no need to worry as trying these mentioned solutions won’t harm or change the settings of your browser.

Other SSL Certificate Errors and Troubleshoot Guide

Quick Guide To Fix Error Message: err_ssl_server_cert_bad_format

Google chrome is one of the popular and widely used web browsers throughout the globe. Many users rely on it, and it’s no exception that sometimes unwanted error messages do occur when someone tries to open the website. Some are common, and some are quite unheard such as err_ssl_server_cert_bad_format

If you think what does this error message means or how to solve it, then you’re not alone. It’s not an error that is seen often, so it’s quite apparent that you might question how come this error message occurred.

Let’s get into details.

What Does This Error Message: err_ssl_server_cert_bad_format Means & What causes it?

It’s one of the SSL based errors that occurs whenever you try to visit a website that has a self-signed SSL/TLS certificate installed instead of an SSL/TLS certificate provided by trusted Certificate Authority such as Sectigo or Comodo.

SSL/TLS Certificates provided by known certificate authorities are called trusted, and it’s accepted globally by all the popular web browsers like Google Chrome and Mozilla Firefox.

Put simply, Self-signed SSL/TLS Certificate is the ones that are signed by the same individual to whom the certificate has to be issued. For example, owner of the website, signing an SSL certificate on their own for their site. Moreover, the signing procedure and the private key are not signed by any trusted Certificate Authority such as Sectigo but the owner of the website itself.

How to Solve This Error Message: err_ssl_server_cert_bad_format?

There’s a solution, but it’s temporary.

To solve this issue, follow the below steps:

Click Windows icon at the bottom left corner and type Internet Options and open it by double-clicking on it.

It’ll open Internet Properties. From that, select the tab Security and double click on Trusted Sites. It’ll open Trusted sites pop up. Now, insert the URL of the website, which is showing an error message: err_ssl_server_cert_bad_format in the “Add the website to the zone:”

Once you add the website URL, click Add button and then Close. Finally, click the OK button and try opening the website again.

Ssl_error_weak_server_ephemeral_dh_key Firefox Fix

You can also try this option through the web browser. For example, in Google Chrome,

Click on three dots at the top right corner and click Settings.

From the left panel, click Advanced and select System.

Once it opens, from the right side, click Open your computer’s proxy settings.

It’ll open Internet Properties. Now follow the above steps mentioned for Windows (10).

However, this is not a permanent solution. Moreover, if you’re a website owner and trying to solve this issue permanently, then you will not be able to do so unless you get the certificate installed from a trusted certificate authority. Because, self-signed SSL/TLS certificate is not accepted by any web browser, because it has many drawbacks that are not acceptable to overlook. Besides, if anyone who installs a self-signed SSL certificate, their website visitors will face an error message.

Though, if you’re in doubt whether to go with the paid one or not from SSL/TLS certificate providers like RapidSSL, Sectigo, or Comodo, then there’s one more option of getting a free trial before making any final decision. For example, RapidSSL CA offers an SSL Certificate as a 30-day trial free of cost.

First and foremost, a self-signed SSL certificate must be avoided. Unless you’re using for testing purposes internally, then it’s a different thing. Moreover, if you’re a website visitor who’s facing this error message: err_ssl_server_cert_bad_format, then we recommend going through the steps mentioned above. If you’re a website owner, then we would say it’s better to install an SSL/TLS Certificate provided from a respected Certificate Authority.