Unable to establish ssl connection. SSL connection error, what should I do? Disabling plugins and extensions

First, let's figure out what kind of connection this is. SSL is a cryptographic protocol that makes the connection between the browser and the resource you need more secure. Sites that use this protocol are signed as https://. You can absolutely stop worrying about information leaks if the certificate has been completed in the required form and has not expired.

Method No. 1 Check the time and date settings

In your browser you may receive the message “ The server certificate is not yet valid.”, which means that the time for the certificate to work has not yet come. In this case, the problem is likely to come from you rather than from the site.

All you need to do is check the date and time on your PC. These settings are most often lost due to a dead battery on your motherboard. Just put the time and error required SSL connections will disappear.

Method No. 2 Checking the Firewall and Antivirus settings

Sometimes the resource you go to decides that your security utilities are spyware and blocks them. To check for this problem, simply disable the check https:// in the antivirus.

Let's look at the example of an antivirus Avast how to do it go this way: Settings -> Active Protection -> Web Shield Settings

Inside this tab there is an option “ Enable HTTPS scanning” which you need to uncheck.

Method No. 3 Update the browser and system

We know that the advice to update is a rather hackneyed topic, but still it’s time useful advice. Update your browser and entire system. Perhaps this will solve your connection problem SLL.

Method No. 4 Malicious utilities and viruses

IN modern world Such things have incredibly huge functionality. Let's look at some of the skills of these “pests”:

Can bypass anti-virus protection.
Makes your PC invisible on the network to other PCs.
They block various sites.
They may just show you a whole bunch of ads.
They change your start page, without your knowledge.
Blocks port 80, etc.

Scan your PC using special utility Anti-Malware Bytes. It will help you find various threats to your system. Even if you think you're keeping your PC squeaky clean, rest assured there's something there.

Almost every user has encountered many problems in the browser. One of these problems is SSL connections, which does not allow you to view the necessary pages. Let's look at all the ways to fix this problem.

First stage

So, first you need to decide what kind of problem it is, where it comes from, and only then look for ways to fix it. If an SSL connection error appears on your computer when you try to connect to any page on the Internet through a browser, this indicates that the problem is caused by a mismatch in the system. Therefore, this needs to be corrected, but, as practice shows, this is not as easy as it might seem at first glance.

Often everyone refuses to work installed browsers. The only way out is to use standard IE, which in 90% of cases does not produce such an error. This browser can be used until a solution to the problem is found. In simple words An SSL error indicates that a connection to the server cannot be established for some reason. Let's figure out what causes this kind of problem.

Causes of SSL Errors

So, there are often only a few ways to find out what exactly is preventing you from accessing the Internet normally. So, the first thing you need to do is check the settings of your antivirus, since it is it that can block connections, which is why all the problems arise. You may need to add your browser to exceptions and set less stringent controls on incoming and outgoing traffic. It is also recommended to check if necessary, lower the protection level.

Back in Google error SSL connections can occur when you do not have an antivirus program and the system is infected. In principle, this can be solved either by reinstalling the OS or by scanning the system for infected files. Also note that your time settings may be incorrect. Consequently, a discrepancy is detected on the server, and the connection is determined to be unreliable or insecure. Another common reason is an outdated browser.

SSL origin connection error

If you like to play good games on your computer and buy them online, then most often such a product requires activation. Even though this is a minute process, it can become a real headache for you due to SSL protocol failure. However, the detailed error text may look different. For example: “client authentication certificate required” or “SSL_ERROR_PROTOCOL”. You can fix everything as follows.

We go into the antivirus, if, of course, it is available. Next we go to the settings, to be more precise, we need the line “https protocol filtering”. Here you need to uncheck the box, that is, turn it off. Reboot the computer and try to install origin. If everything went well, then if not, it is advisable to install the game from the disk and just try to update it. What else can help is using a different browser, for example, not Chrome, but Opera.

SSL connection error: fixing the problem

Let's figure out what to do if this kind of problem arises. First of all, there is no need to panic. It’s not all that scary and can be resolved in a few minutes. The main reason for the error is that, as noted above, this happens for several reasons. One of them is a dead battery in the BIOS. It can be changed, it costs 40-50 rubles.

We also pay attention to the antivirus and the list of programs that are on the blacklist. It will block the connection of these applications. It is worth noting that a broken registry can often be the cause of the problem. Most users rack their brains to solve the problem, but sometimes it happens that this is not an error at all. The fact is that most browsers allow you to enable or disable support for SSL files. Just find the required option in the settings and check the box, after which the problem should be solved.

Enable SSL and Cookies in the browser

In some cases, the presence of this protocol not required. But when you want to use Adsense pages, this option must be enabled. The same applies to Cookies. In principle, for normal operation and display of information, incl. and advertisements, you need a working SSL. So, let's move on to setting up the browser. First of all, you need to go to the menu, and then select settings.

There you should see the “Advanced Settings” tab, this is what we need. The next step is to select the “Content Settings” item, and then you need to go to “Personal Data”. Before us there will be a menu called “ Cookies" We go there and check the box next to the “Save local data” item. Close the tab and switch to HTTPS/SSL. Similar work needs to be done here. Check the box next to “Check if the certificate has been revoked from the server.” If the checkbox is not checked, then SSL will not work correctly. That's all, restart the browser and get to work.

A few more simple ways to solve the problem

If you don’t have time to deal with browser settings or scan the system, then you can try several times in a row which you need to log into. It is likely that after this the information will be partially displayed. However, in the future you will need to do everything according to the instructions. Another way out is to reset your browser settings to Default, that is, to standard ones. This will enable/disable all necessary plugins and scripts. It is also recommended to clear the cache, which sometimes gives a positive result. You can also go to Windows folder, then system 32, then go to drivers to find the “etc” file there. The last line should look like this: 127.0.0.1. Everything below this inscription must be removed. After this, Google's SSL connection error will disappear.

A few important points

Please note that sometimes sites without reliable or expired certificates are a kind of virus carrier. In this case, it is normal to see a window that says “SSL connection error.”

What to do if you still need to visit the resource, you ask. To do this, you must continue the connection by confirming your decision. In this case, you may get a virus on your computer, which is not good. Although if you have it installed, it will give you a corresponding message and automatically block you from working with the malicious site.

Now you know what an SSL connection error is. We also figured out how to fix it. I need to say a few more words about the fact that you need to periodically clear Cookies in your browser. This will not only speed up page loading, but will also relieve you of the problem described above. It is advisable to at least occasionally conduct a full system scan for viruses and suspicious files.

Conclusion

You must understand that if you get this kind of error, then something is wrong with your computer. First of all, check the time. If the year, month or time of day is not correct, you need to correct it. To do this, in your desktop tray operating system Click on the clock several times and set the real values. This usually solves the problem immediately. If this does not happen, go to and see if SSL protocol support is enabled. If everything is as it should be, then most likely the problem is antivirus program or malicious file which blocks the connection. Removing or moving to quarantine should help.

SSL- this is the name of the cryptographic protocol that ensures the security of the communication connection.

When you receive an “SSL error” while surfing the Internet, this may indeed mean that someone is accidentally or deliberately trying to obtain the data you are sending to the Internet. But it’s not always worth being afraid and trying to fix an SSL error right away. Often, such an error can only mean incorrect browser settings, interception of connections by your own antivirus (the antivirus is mistaken for an attacker, and you shouldn’t be afraid of the data it receives), or in general there are problems not with you, but with the site you are trying to access.

If you still have the slightest doubt, it is better to reconnect to the Internet, log in from a different browser and check if the SSL connection error appears in this case.

Let's consider possible options SSL error fixes in specific situations.

How to fix SSL error in Google Chrome and Yandex browser.

So, you are unable to access this or that site - a problem with the security certificate “pops up”. As already mentioned, there is no need to worry - first, just reconnect and change the browser. If the error continues to appear, then:

Check that the Date and Time are set correctly on your computer;
Completely scan your computer for viruses;
Check your antivirus settings carefully. It has already been said that it is the antivirus that a “frightened” browser can often mistake for an attacker and rush to the owner’s defense. Usually the point here is to check the https protocol, try to find it in your antivirus and disable it (if you don’t know where, help and search the Internet by the name of your antivirus program will help). In general, disabling this functionality check antivirus software will have virtually no effect. If the ssl error continues to appear, try disabling the antivirus altogether for a short time (if this doesn’t help, then it’s definitely not the problem, if it helps cure it, maybe it’s worth changing the security program).
Try updating your operating system and browser to the latest versions;
Try creating a new user in your operating system and accessing sites through him;
Try logging in from a different IP address or even a computer;
If you cannot fix the SSL error, try combining several of the above methods at once.

If all this does not help resolve the ssl error, you can disable SSL checking in the browser, but this may not be entirely secure. It’s better to study all the information about the suspicious site before doing this.

Resolving SSL errors on a tablet is a much more pressing issue than on a computer.

The fact is that, starting with Android 2.3, encryption algorithms on tablets have become noticeably weaker and the likelihood of them being decrypted by attackers (i.e. gaining access to your data) is much higher. This leads to a not very favorable situation:

firstly, SSL errors can very easily occur where in fact there is no danger;
secondly, on the contrary, truly experienced hackers can force the protocol to trust certificates where the danger occurs.

Basic security measures and error resolution are given above and many of them are suitable for tablets, but if you value the security of certain data, for now it is better to refrain from entering it on tablets unless absolutely necessary on suspicious sites.

One day, when I turned on my computer, I tried to go to my favorite site that I regularly visit, and unexpectedly received an unpleasant “gift” from the browser in the form of a message: "Error 107 (net::ERR_SSL_PROTOCOL_ERROR): SSL protocol error.". Trying to figure out the reasons for the dysfunction, I started visiting other familiar sites, trying to track down which of them showed a similar message. Some sites basically did not want to load, giving the error ERR_SSL_PROTOCOL_ERROR, while I visited others without any problems and no SSL protocol errors occurred.

Trying to understand the reasons for the problem of loading sites, I had to study many sources, and now I will tell you what exactly needs to be done to correct this situation with the ERR_SSL_PROTOCOL_ERROR SSL protocol error, if you also encountered it. So, first things first.

As you know, SSL is a cryptographic protocol that ensures the security of Internet connections and until recently was widely used for exchanging instant messages: in e-mail, Internet faxes, IP telephony, etc. Now SSL has lost its status as a reliable and secure protocol, experts have discovered It has a number of vulnerabilities, and today the SSL protocol is increasingly being replaced by the more reliable TLS.

However, on given time All major browsers still use the SSL protocol, so any user may encounter problems using it, in particular the mentioned error 107 (as well as similar 101 and 112), which occurs when the connection security is compromised. This ERR_SSL_PROTOCOL_ERROR SSL error occurs especially often on Google Chrome, but it is also common on other browsers. To solve this problem you need to take a number of actions, which I will discuss below.

Perhaps it's a virus?

To begin with, it wouldn’t hurt to check your computer for viruses using special programs level Trojan Remover or Dr.Web CureIt. The reason your browser is not working correctly may be due to your computer being infected with various malware.

What happened to the date and time?

You may be surprised, but this very factor may be the cause of error 107. Check that the date and time in the computer settings are correct, and if necessary, change the date and time to the correct ones by right-clicking on the time bar at the bottom right of the screen.

Select "Date and Time Settings";
And then click on “Change date and time”, enter the correct data and confirm the changes.

Changing antivirus settings

Go to your antivirus settings and try disabling protocol checking for a while HTTPS. This is especially true for antivirus owners Eset Smart Security Nod32 5, for many of them the problem was solved in this way.

If you have Eset, then go to settings, there select “Internet and e-mail»;
Next, “Protection of Internet access”, select “HTTP, HTTPS” and check the box next to “Do not check the HTTPS protocol”;
Click “Ok” and confirm the action.

In addition, antiviruses such as Avast or Kaspersky can intercept SSL connections and use their personal certificate, often far from perfect. Try disabling SSL connection checking in the specified antivirus programs.

In addition, you can try putting your browser in antivirus exceptions, at least temporarily. This may help resolve the SSL protocol error called ERR_SSL_PROTOCOL_ERROR.

Updating Windows XP

If you are a retrograde and a lover of antiquities, and are still using Windows XP with SP2, then update it to SP3, this may also help solve the problem. Make sure your SHA-256 algorithm is supported.

Is the browser or firewall to blame?

Try lowering your firewall and updating your browser if you've been using it for a while. Old version browser may be causing error 107.

Try CCleaner

According to some users, cleaning the system using CCleaner helped to effectively deal with this error in the browser. Try to take advantage of CCleaner's capabilities too.

Conclusion

This error 107 is one of the common problems when working with SSL connections. Avoid appearing on your computer malware, try to work only with new software, monitor the correct date and time, set your antivirus settings as recommended above - and you will avoid the “Error 107. SSL protocol error” warning appearing on your personal computer.

In each situation, the cause of the SSL Connection Error is individual. It can be caused either by the server from which information about the site is requested, or by the user’s computer. If the source of the problem is the site visitor’s computer, the solution should be sought in the browser from which the resource is accessed.

SSL Connection Error is typical mistake for browsers based on the Chromium platform. Such browsers include not only Google Chrome, but also its various analogues: Yandex.Browser, modern versions of Opera, Comoda Dragon and others. In all of them, the cause of the error is a problem with the client authentication certificate.

If an SSL connection error occurs, your browser will not be able to access one or more sites because the message SSL Connection Error will appear in the window. To continue using the Internet to its fullest extent, you need to get rid of the problem. Below we discuss what to do if an SSL connection error appears in Google Chrome, but the instructions are universal and the problem is resolved in a similar way in other browsers:

Please update your browser. If you encounter any problems related to connecting to sites on the Internet or playing content on them, you should first install the latest version of your browser. More often Google browser Chrome updates automatically or prompts the user to download it themselves latest version, but many ignore the recommendations, which leads to various problems.

To update Chrome browser, you need to go to the settings and click on the “About” item. Next, you need to pay attention to whether the latest version is installed. If not, your browser will need to be updated.

Explore installed extensions. Often problems with browser performance arise due to various extensions. Inexperienced users may accidentally install virus extensions that harm the computer. Also, some licensed extensions may conflict with certain sites or scripts running on them, which will result in an SSL connection error.

To check if the error is related to extensions, go to Google settings Chrome and then switch to the “Extensions” item. Disable all running extensions and try again to connect to the site where the SSL Connection Error message appeared. If the error is not corrected, proceed to the next step.

Reset your proxy settings. To connect to sites on the Internet, Google Chrome uses proxy server settings. They can go wrong for various reasons: due to the actions of a third-party extension, a virus, one of installed programs on the computer and so on.

Resetting the proxy server settings to default values is quite simple. Just go to the Google Chrome settings, select “Show additional settings" and in the "Network" column, click on the "Change proxy server settings" button. Next, you just have to choose the option with automatic detection settings and you can try to launch the site on which the SSL Connection Error appeared.

Make sure the problem is not related to your antivirus. Antivirus applications do not work perfectly, and because of them, various problems may arise when connecting to sites on the Internet. To check whether the antivirus operation is related to the SSL Connection Error, you need to disable the anti-malware program and try to access the site.

Important: Disable your antivirus only if you are sure that the site you are visiting does not contain viruses.

If disabling your antivirus helped fix the SSL error, you will need to find an item in its settings that allows you to create an exception for the SSL protocol.

When none of the above tips help get rid of the problem, you should make sure that the site is currently accessible. It is possible that the error occurs on the server side, and it is not possible to access the resource from all devices.

Client Authentication Certificate. What does authentication mean? Causes of SSL Errors

Here's a typical question:

Error 107 appears when accessing https://vk.com/. When I try to log in, a message appears: “Cannot authenticate via a secure connection. Most often this happens when the current date and time are set incorrectly on your computer. Please check your system date and time settings and restart your browser."

Date and time are correct. Hosts file also normal. There are no viruses. Reinstalling Chrome didn't help.

Here we suggest how to fix an SSL connection error connecting to vk.com or other sites. For example, it is not possible to create secure connection with the server. There may be a problem on the server, or a client authentication certificate is needed, which you do not have and is issued:

Error 107 (net::ERR_SSL_PROTOCOL_ERROR): SSL protocol error.

Such VK ssl errors or yandex, google ssl errors can often occur if you do not solve some problems. Here are some guidelines to resolve the SSL error. So, if you encounter an SSL error, try these steps:

Check if the date and time on your computer are set correctly.
In your antivirus settings, try temporarily disabling HTTPS protocol checking
If the problem occurs on Windows XP SP2, update it to SP3.

SSL protocol error often happens with Eset antivirus Smart Security 5, which incorrectly filters the https protocol. You need to disable https check and everything should work.

If everything is fine with SSL on the site, then most likely the problem is that Kaspersky intercepts SSL connections and then proxies them to the browser using its own crooked certificate. A normal browser will display an error warning about a MITM attack. You should try disabling SSL connection checking.

Often, if there is an SSL error, all installed browsers refuse to work. The only way out is to use standard IE, which in 90% of cases does not produce such an error. This browser can be used until a solution to the problem is found. In simple words, an SSL error indicates that a connection to the server cannot be established for some reason.

As noted above, you need to check the settings of your antivirus, since it can block connections, which is why all the problems arise. You may need to add your browser to exceptions and set less stringent controls on incoming and outgoing traffic.

Check your firewall settings. If necessary, lower the protection level.
Also at Google, an SSL connection error can occur when you do not have an antivirus program and the system is infected. In principle, this can be solved either by reinstalling the OS or by scanning the system for infected files.
The time settings are lost. Consequently, a discrepancy is detected on the server, and the connection is determined to be unreliable or insecure.
An outdated browser is also a cause of SSL errors.

How to recover the password for access to the profile on MAMBA dating, I can’t log into the dating site mamba.ru. Blocking of a profile by IP address due to violation of the agreement. Technical support address.
This is necessary to know, for example, to organize an xml search on Yandex. It indicates the IP address of your server from which search requests are coming.

Public key protocols allow you to establish authorized encrypted communications between nodes in internal networks and on the Internet. There are three models of authentication carried out in these protocols; they are used both individually and in combination.

Client authentication. Allows Windows server 2000 VPN or IIS web server identify the user using standard methods public key encryption. Verifies the authenticity of the client certificate and public ID, and verifies that this data was generated by a certificate authority whose root certificate is installed in the list of trusted CAs. This verification is very important if the server is a bank that transmits confidential financial information to the client and needs to confirm the identity of the recipient. Figure 8.1 shows the authentication process.
Server authentication. Allows the VPN client or SSL/TLS client browser to verify the server's identity by verifying that the server's certificate and ID are correct and that the certificates were issued by a certificate authority (CA) whose root certificate is present in the client's list of trusted CAs. This confirmation is important for the website user who submits the number credit card over the network and wants to make sure that this is the server he needs.
Mutual authentication. Allows the client and server to authorize each other at the same time. Mutual authentication requires that the client and server have digital certificates and appropriate root certificates CA in the lists of trusted CAs.

Most commercial CAs, such as Verisign, are built into Netscape and Microsoft browsers as default root certificates. Users and network managers do not need to install certificates; server authentication works automatically. If the organization acts as its own certificate authority, then it is necessary to additionally install the root certificate on all browsers of intranet client computers and provide appropriate instructions.

Figure 8.1 shows how SSL/TLS authentication works. In practice, most websites only use server-side authentication using a digital certificate, since distributing client certificates to all site visitors is a huge undertaking (somewhat easier if clients are connected to an intranet).

An argument against using certificates on client computers is that it opens the system to potential dictionary attacks. The browser client authenticates the server using public key methods, but the server simply uses passwords to authenticate its clients, so a hacker can perform a password guessing attack. The management of companies that do not use certificates believes that the cost of development is higher than the real threat; Like most business decisions, this statement is based on economic factors.

Almost every user has encountered many problems in the browser. One of these problems is SSL connections, which prevents you from viewing the pages you need. Let's look at all the ways to fix this problem.

A few more simple ways to solve the problem

If you don’t have time to deal with browser settings or scan the system, then you can try several times in a row which you need to log into. It is likely that after this the information will be partially displayed. However, in the future you will need to do everything according to the instructions. Another way out is to reset your browser settings to Default, that is, to standard ones. This will enable/disable all necessary plugins and scripts. It is also recommended to clear the cache, which sometimes gives a positive result. You can also go to the Windows folder, then system 32, and then to drivers to find the “etc” file there. The last line should look like this: 127.0.0.1. Everything below this inscription must be removed. After this, Google's SSL connection error will disappear.

Please note that sometimes sites without reliable or expired certificates are a kind of virus carrier. In this case, it is normal to see a window that says “SSL connection error.”

You must understand that if you get this kind of error, then something is wrong with your computer. First of all, check the time. If the year, month or time of day is not correct, you need to correct it. To do this, in the desktop tray of your operating system, click on the clock several times and set the real values. This usually solves the problem immediately. If this does not happen, go to and see if SSL protocol support is enabled. If everything is as it should be, then most likely the problem is an antivirus program or a malicious file that is blocking the connection. Removing or moving to quarantine should help.

Authentication is a procedure for verifying the identity of an object or subject.

We can talk about verifying the user's authenticity by comparing the password he entered with the cipher stored in the database.
Authentication is also called checking the checksum of a file for compliance with the amount that was declared by the author of the file.

Client Authentication Certificate

Client certificates are intended for owner authentication in the case of secure client-server applications, or for use in systems electronic document management during the creation and verification of an EDS (electronic digital signature).

Strict control of the reliability of the information in the certificate allows us to provide the most strict cryptographic authentication, which makes it possible to confirm the signature of the certificate owner under electronic documents.

The production and maintenance of client certificates is carried out on a paid basis.

Other materials in the series:

Client authentication network services using digital certificates - summing up

In the first part of a series of posts about client authentication using certificates, we did a throw-in and talked about the main points of this topic. We realized that certificates are much more secure than your passwords (if you prepare them correctly!). In this part I propose to engage in theory. Long, difficult, tedious, but necessary. Today's theory will consist of studying the general principle of how certificate authentication works and how it looks in communication between client and server.

General certificate authentication scheme

When a user authenticates with a certificate on a website, the process goes something like this:

A user requests access to some network service;
Upon request, the server sends its server certificate (SSL certificate) to the client. The client checks it for validity. If the check fails, that's the end of it;
If the check is successful, the client requests access to the service resources;
The service is configured to require user authentication and sends the available (on the server) authentication methods to the client. In our case, this is a requirement for a client certificate;
The client sends to the server the public part of its certificate and a certain amount of data signed with the client certificate. The server checks the client certificate for validity. If the certificate does not pass verification, the conversation between the client and server ends. If the certificate passes verification, the server attempts to match (or associate) the certificate with account user. If the matching fails, the conversation ends.
If the account is found and the certificate can be associated with it, the server begins establishing a secure channel. After establishing this channel, the server provides the user with resources to the extent that access lists (ACLs, for example) allow it.

I considered it necessary to expand on the last point a little so that you understand general device this channel (since people have some misconceptions about this):

The client requests the establishment of a secure channel;
The server agrees and sends the client a list of supported symmetric encryption protocols;
The client sends its list of symmetric encryption protocols to the server;
The client and server negotiate and select the most appropriate protocol. For example, - I can do DES and 3DES, but what can you do? - And I only know 3DES and AES. - Great, let's use 3DES then;
The client, on its side, generates a session symmetric encryption key and encrypts it with the public key of the server certificate. This process is called Key exchange. As we know, only the web server can read this key, because only he owns private key, which is associated with a specific SSL certificate;
After this, all transmitted data is encrypted with this particular session key. Remember that certificates are no longer used when transferring data (and many people believe that all data is encrypted public keys certificates). Certificates are only used when updating the session key (which changes periodically).

A slightly different process occurs during an interactive login or login to a terminal server using Remote Desktop using a smart card.

Logon with a smart card or PKINIT

Interactive authentication in Active Directory According to the certificate, it is not an independent mechanism. As always, the main authentication protocol in the domain is Kerberos. To ensure interaction between smart card authentication and Kerberos, a simple PKINIT protocol is used. PKINIT, in turn, is just an add-on to Kerberos (or a protocol extension). Here's roughly how it works:

Note: If the user already has a corresponding service ticket (TGS), only steps 5 and 6 are performed.

The user enters the smart card PIN and sends an AS-REQ request to the domain controller (aka Key Distribution Center - KDC). This request contains the pre-authentication data PA_PK_AS_REQ, which in turn contains the login certificate and signed timestamp and optional attributes. As optional attributes, the client sends a list of supported algorithms, root CAs, Diffie-Hellman parameters, etc. A more detailed request structure (and there are quite interesting things there) can be found in RFC 4556 §3.2.1 (clause 5 on page 12). In this regard (for example, transferring a list of trusted root CAs from the client to the server), the time of logging in with a smart card will be much slower than with a login/password combination. Plus the costs of cryptographic operations.
The KDC server verifies the request and tries to associate the received certificate with the user account. If matching the certificate to the account was successful, the KDC generates an AS-REP response, including a Ticket-Granting Ticket (TGT) and other necessary information. The response is signed with the certificate of the KDC itself (which is why, when using a smart card for login, the KDC server must have its own certificate (we will talk about it in the following articles).
The client validates this response and verifies the signature (along with the KDC certificate). If everything is fine with the response and certificate, the client, based on the existing TGT, generates a Ticket Granting Service request - TGS-REQ for access to a specific service and sends it to the KDC.
The KDC checks the TGS-REQ request and, if the verdict is positive, generates a Ticket-Granting Service (TGS-REP) response, including all the necessary information for an interactive login, including all the necessary SIDs and credentials for authentication using NTLM.
The client generates a special GSS-API token (

Ssl error how to fix:

1. Check the time and date.

As you can see, in the second case there is the text “The server certificate is not yet valid.” those. The certificate's start date has not yet arrived. This is unlikely to be a site problem. Most likely the problem is on our side.

In this case, everything is corrected simply. Let's check the time on our computer (tablet). Not true.

On motherboard The computer's battery ran out, which led to the time being reset back to 2002. Having set the time, we see that the SSL protocol error has disappeared and the site opened safely.

2. Check your antivirus and firewall settings.

The SSL error associated with an incorrect date is the most common. But what if the date is okay? What else could cause the error?

Most antiviruses and firewalls check ssl protocol and it often happens that the server with which you exchange data mistakes your antivirus for a spy - an attacker who is trying to intercept your data. You can disable the https:// check function and check whether the error appears again.

Let's look at disabling https checking using the example of one of the most popular free antiviruses- Avast.

Open the antivirus management window, select “Settings”, then “Active protection”. Click on the button<Настройки>Web screen. A third window will open in which you need to uncheck “Enable HTTPS scanning”.

Within the scope of this article, we will not be able to consider all popular antiviruses and firewalls. Yes, there is no need. In other antiviruses the logic is approximately the same. So we hope you can figure it out for yourself.

3. Browser and system update.

The time is set correctly, HTTPS checking is disabled in the antivirus, and the SSL error haunts me. The advice is pretty standard, but nonetheless effective. Update your browser, update your operating system.

I remember in 2012, the Google Chrome browser was updated to version 18.0.1025.151. For everyone who had Windows 7 - x64 installed at that moment, it made it impossible to connect via ssl. Everything was fixed with the next update.

It happens that an update simply “corrects” some shortcomings, replacing outdated information (settings) with new information.

Be that as it may, it won't hurt to update.

4. Malware, viruses and other “evil spirits”.

IN lately There are so many computer “evil spirits” that there is simply no way to keep track of what it can do and what it can’t do. Malware is especially famous for this - a type of malware that can:

Bypass antivirus protection.
Make the computer “invisible” to other computers on the network.
Block access to sites, such as Kaspersky and Doctor Web.
Attract advertising to all browsers.
Replace without asking start pages browsers.
Download even more Malware.
Block connections on port 80, as well as block ssl

... and much, much more. How much imagination is enough?

So, download CureIT and Anti-Malware Bytes, update your antivirus, turn off its screens for a while so as not to interfere. And start scanning. In 90% of cases, on a seemingly “clean” computer, these two programs find something.