Deactivating SSLv3 on IIS
SSLv3 is an obsolete protocol, the main attack vector on which, at the time of writing, is an attack called POODLE. Disabling SSLv3 is the ultimate solution to mitigate security risks. Another option suitable for servers that critically require SSLv3 support is a signalizing TLS_FALLBACK_SCSV cipher suite that allows to keep SSLv3 enabled, but prevents downgrade attacks from higher protocols (TLSv1 =< ). Unfortunately, at the time of writing, Microsoft didn’t yet add support for TLS_FALLBACK_SCSV in SChanel. Therefore, disabling SSLv3 is the only mitigation measure a certificate administrator can apply against POODLE in case of a Windows Server.
- Open registry editor:
Win + R >> regedit
- Navigate to:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\Schannel\Protocols\
By default, there should be only one key presented “SSL 2.0”. We need to create a new one for SSLv3 Right-click on Protocols >> New >> Key
Name the key 'SSL 3.0'
Right-click on SSL 3.0 >> New >> Key
Name the key 'Server'
Right-click on Server >> New >> DWORD (32-bit) Value
Name the value 'Enabled'
Double-click the Enabled value and make sure that there is zero (0) in the Value Data field >> click OK
You may need to restart Windows Server to apply the changes.
FAQs
In the navigation tree, under SSL 3.0, select Server and then, in the right pane, double-click the Enabled DWORD value. In the Edit DWORD (32-bit) Value window, in the Value Data box leave the value at 0 and then, click OK. Restart your Windows server. You have successfully disabled the SSL v3 protocol.
How to disable SSL on Namecheap? ›
How can I revoke my certificate?
- Log into the account dashboard;
- Go to Domain List;
- Locate the domain name associated with the certificate and click on the caret to expand the list of services;
- Find the SSL certificate you need and press the Manage button next to it to get to the certificate management page.
In the navigation tree, under SSL 3.0, select Server and then, in the right pane, double-click the Enabled DWORD value. In the Edit DWORD (32-bit) Value window, in the Value Data box leave the value at 0 and then, click OK. Restart your Windows server. You have successfully disabled the SSL v3 protocol.
How do I disable SSL certificate? ›
Disable SSL Certificate Verification for an environment
- Open the API Client UI.
- Click on the Environments pane of the sidebar.
- Select your environment of choice.
- Click on the Settings tab.
- Use the Certificate Verification dropdown to disable or enable SSL verification.
Deleting SSL certificates
- Go to your console's security menu. For more information, see Navigating to devices.
- From the Security menu, select SSL > Certificates.
- From the Actions menu, select Delete for the wanted SSL certificate.
- Click Yes to delete the SSL certificate.
Same comes to the SSL certificates services, you may find companies who offer free SSL certificates and those who sell paid ones. On Namecheap.com, you can get a free SSL certificate upon registering a hosting account using a shared hosting plan.
How to revoke an SSL certificate? ›
To Revoke an SSL Certificate
Select SSL Certificates and select Manage for the certificate you want revoke. Under Certificate Details, select Revoke next to Status. Select the reason why you're revoking the certificate and then select Revoke Certificate.
Should SSL 3.0 be enabled? ›
You should most definitely disable SSL version 3. It is not secure.
Can you disable a certificate? ›
Certificates are enabled by default. You can disable a certificate as method for disabling partner access. You might also disable a certificate when preparing it as a replacement for a certificate that is about to expire. In this case, you don't want to enable the key until it replaces the existing key.
What happens if we disable SSL? ›
Important: These instructions explain how to disable the SSL certificate, which permits unencrypted connections to the server, including user login credentials. Disabling SSL can create a security exposure where a malicious user within the network can attack the system.
Locate and right-click on the certificate you wish to remove. Click on Properties and then in the General tab, click on Disable all purposes for this certificate in the Certificate purposes section. Hit Apply and restart your server to complete the removal process.
How do I unbind SSL certificate? ›
Disable Universal SSL certificate
Select your domain. Go to SSL/TLS > Edge Certificates. For Disable Universal SSL, select Disable Universal SSL.
Can I cancel SSL certificate? ›
These are processed via a third party, Comodo, and cannot be reversed or refunded once the certificate has been generated. However, if the SSL certificate has not yet been issued (common while the certificate is pending completion), the purchase can be cancelled.
How do I disable the SSL registry? ›
Deactivating SSLv3 on IIS
- Open registry editor: ...
- Navigate to: ...
- By default, there should be only one key presented “SSL 2.0”. ...
- Right-click on SSL 3.0 >> New >> Key. ...
- Right-click on Server >> New >> DWORD (32-bit) Value. ...
- Double-click the Enabled value and make sure that there is zero (0) in the Value Data field >> click OK.
Locate and right-click on the certificate you wish to remove. Click on Properties and then in the General tab, click on Disable all purposes for this certificate in the Certificate purposes section. Hit Apply and restart your server to complete the removal process.
How to disable DNSSEC on Namecheap? ›
In order to disable Domain Privacy service for your domain, follow the instructions below:
- Sign into your Namecheap account.
- Select Domain List from the left sidebar and click on the Manage button next to your domain:
- Toggle the Protection button next to Domain Privacy in order to disable it:
Google Chrome
- Start the Windows Control Panel.
- In the Find a setting text box, type internet options, and then click Internet Options.
- Click the Content tab.
- In the Certificates section, click Clear SSL state, and then click OK.
