#disable insecure tls ssl protocol support

[techdirectarchive]

(via How to Disable TLS 1.0, TLS 1.1 and TLS 1.2 in Windows Using GPO)

[transport-layer-security]

Transport Layer Security (TLS): The Backbone of a Secure Internet

In today’s digitally connected world, security and privacy are more important than ever. Whether you're accessing your bank account, shopping online, or simply browsing a website, you're likely using Transport Layer Security (TLS) — the cryptographic protocol that protects internet communications.

In this post, we’ll explore:

What TLS is and why it matters

How TLS works under the hood

TLS vs SSL

Real-world use cases

Common threats and how TLS mitigates them

Transport Layer Security (TLS) is a cryptographic protocol that ensures privacy, integrity, and authenticity of data exchanged over a network. It’s widely used to secure:

Web traffic (HTTPS)

Email (SMTP, IMAP, POP)

Messaging (XMPP, SIP)

VPNs and more

TLS operates between the transport layer (e.g., TCP) and the application layer (e.g., HTTP), encrypting the data before it's transmitted over the internet.

 How TLS Works: Step by Step

When a client (e.g., browser) connects to a server over HTTPS, here's what happens:

1. Handshake Initiation

The client sends a ClientHello message:

Supported TLS versions

List of supported cipher suites

Random number (used in key generation)

Optional: SNI (Server Name Indication)

2. Server Response

The server replies with a ServerHello message:

Selected cipher suite

TLS version

Server's digital certificate (usually an X.509 certificate)

Optional: server key exchange

3. Authentication & Key Exchange

The client verifies the server's certificate via a trusted Certificate Authority (CA).

Both parties generate or agree on session keys using techniques like Diffie-Hellman or RSA.

4. Session Key Generation

Once keys are exchanged:

Both client and server compute a shared symmetric session key.

5. Secure Communication

All subsequent data is:

Encrypted using the session key

Authenticated (to detect tampering)

Integrity-protected using MACs (Message Authentication Codes)

 TLS vs SSL: What’s the Difference?

People often say “SSL” when they mean TLS. Here’s the truth:Feature  SSL (Deprecated)TLS (Current)Latest VersionSSL 3.0 (1996)TLS 1.3 (2018)SecurityVulnerableStrongUse TodayNone (shouldn't be used)Everywhere

Modern websites and applications use TLS 1.2 or TLS 1.3, and all versions of SSL are considered insecure.

 TLS Use Cases

HTTPS (TLS over HTTP)

Secure browsing (padlock in browser)

Required for PCI DSS, GDPR compliance

Email Encryption

Secure SMTP (STARTTLS)

IMAP/POP with TLS

VoIP and Messaging

TLS protects SIP, XMPP, and chat services

VPNs

OpenVPN uses TLS for secure tunnels

APIs and Microservices

Internal and external APIs often rely on TLS to secure REST and GraphQL endpoints

Common Threats and TLS ProtectionsThreatTLS DefenseMan-in-the-Middle (MITM)Authentication via certificatesEavesdroppingSymmetric encryption of session dataTampering or Data CorruptionMessage integrity with MACsReplay AttacksRandom values and sequence numbersDowngrade AttacksTLS version enforcement & SCSV mechanism

 Best Practices for TLS Configuration

Use TLS 1.2 or TLS 1.3 only.

Disable SSL and TLS 1.0/1.1 completely.

Use strong cipher suites (e.g., AES-GCM, ChaCha20).

Regularly renew and monitor your TLS certificates.

Enable HSTS (HTTP Strict Transport Security).

Use tools like SSL Labs, Mozilla Observatory to test your server.

TLS in Action (Example)

When you visit https://sfouresolutions.com:

Your browser initiates a TLS handshake.

The server sends its certificate.

A session key is negotiated.

Your browser encrypts the HTTP request with that key.

The server decrypts it, processes it, and responds securely.

 

All of this happens within milliseconds, seamlessly.

 Final Thoughts

TLS is a foundational technology that quietly protects the internet. As cyber threats grow in sophistication, strong TLS configurations and practices are not optional — they are essential.

Whether you're a developer, sysadmin, or business owner, understanding TLS helps you build safer systems and protect user trust.

[digitalpriase-blog]

List Of SSL Issues And A Few Debugging Tips To Resolve Error Using The Weblogic Server

SSL encryption is quite essential to handle HTTPS links and verify its security certification while accessing any website on the internet. Lack of proper SSL certificates can be a serious issue for the users when they open a site. If the website has too many SSL Issues, it clearly indicates some kind of technical error.

So, if you are experiencing this problem, it won’t allow you to find the correct website. Also, disabling SSL encryption can give unauthorized access to third-parties, which can increase the risk of eavesdropping. According to networking experts, SSL encrypted pages are far more secure than unencrypted HTTP links.

So, if you want to fix the issues with your site’s SSL certificate, keep reading this article. Here, you can go through some technical hacks in order to resolve SSL problems.

Some Common SSL Issues that can Prevent Users from Accessing Servers

If you are lacking clarity regarding the types of SSL Issues that you can experience while accessing a website, check out the following information. It will help in understanding the relevant errors that can happen if your SSL encryption is not correctly done.

A majority of users might not be aware of this fact that they are using insecure or broken protocols while browsing. So, you can come across networking problems if you are using SSL 2.0 and SSL 3.0 versions.

Some of the TLS stacks can become corrupt due to severe implementation problems in the server. This can even result due to technical flaws in major servers including Apple, OpenSSL, Microsoft, and more.

There can be many kinds of defects and limitations with the programming languages like PHP, Ruby, Python or any other, which can have unverified certificates. This can also create conflicts with the hostname and block access to the actual website.

Many customers can be using insecure ciphers unknowingly which can also generate various issues with SSL.

How to Troubleshoot SSL Issues by Means of Technical Methods?

If you are unable to access your favorite websites or update any new information on your site due to SSL Issues, check the following information. It will guide you regarding the tools and solutions to fix the issues with your SSL encryption.

Switch to Different Client or Weblogic Server

In case any particular website/server is giving any troubles due to SSL error, you can access the link from various apps or browsers. Sometimes, the technical aspects of this error can also become clear, when you access the server using different networks.

Hence, you can add your SSL debugging code to the startup file for Weblogic and launch the server. For this purpose, you can open the link startManagedWebLogic.cmd/startManagedWebLogic.sh and include your code developed to fix SSL Issues.

Avoid Corrupted Certificate or SSL Protocol Version

Users need to stop using broken links or making use of lower or outdated SSL versions for connecting to servers. Also, to avoid any attacks through a suspicious site, you can avoid links that are not starting with HTTPS. You can also prefer those browsers to access the sites, which are available with SNI support.

Make Use of ‘-CAfile’ and ‘openssl s_client’

In order to check the validity and source of an SSL certificate, you can utilize some effective features. Hence, it is better to use ‘openssl s_client’ option for checking the active status of certificates. Also, if you want to resolve most of the SSL problems, you can use ‘-CAfile’ and check the system defaults settings for any website or server.

In this article, you came to know about some important details regarding SSL Issues and its troubleshooting tips. However, if you want more updates on how to debug SSL problems with Weblogic server, you can consult networking professional.

[longevitytechnologies-blog]

For PCI Compliance time is up. Today is the first day requiring TLS 1.1 or 1.2 to be PCI 3.1(2) compliant.

Systems that handle payment information, particularly e-commerce systems, are regulated by PCI DSS. Changes to the PCI compliance requirements have reclassified the use of outdated and insecure versions of TLS (and its predecessor, SSL) as non-compliant. This has some significant impact across the software industry as the changes went into enforcement today, June 30, 2018. The key takeaways for us as web application developers are that we must ensure that our deployed systems are using modern and secure TLS configurations, and that we should now do so at the expense of supporting legacy web browsers that are non-compliant, namely old versions of Internet Explorer and Windows. At Rietta, we are more concerned with providing strong protection technology for our customers than with achieving the minimum compliance that we can get away with, and accordingly, our recommendations are to use the maximum reasonable controls allowable based on your system’s business and user support requirements. For us, this sometimes means abandoning insecure legacy support as soon as it becomes a valid business option, and this is a case in point.

June 2018 Deadline for PCI DSS version 3.1 / 3.2 requirements

The PCI DSS version 3.1 published in April 2015 updated the requirements for securing transmission of data, originally with a June 2016 deadline. This deadline was revised to June 2018 based on industry pushback and kept in place in the PCI DSS version 3.2. Now the final deadline for this change is upon us, meaning it’s time to hurry up and comply if you haven’t already. It’s also a perfect time to review and revise your organization’s procedures for implementing, documenting and verifying TLS security.

Use TLS 1.2, disable fallbacks to weak versions

The basic changes that should be implemented and enforced for acceptable transport security are to ensure support is enabled for TLS 1.2 and better, applying known best-practices for secure cipher suite selection, and to disable fallback support for any version of TLS or SSL below 1.1. This will have the noteworthy side effect of eliminating support for Internet Explorer on Windows Vista or older, as well as versions of Internet Explorer on systems that do not enable TLS 1.1 or 1.2, which are not enabled by default for versions below IE11 on Windows 8.1 or greater.

SSL Labs Server Test is your friend

Qualys SSL Labs provides a free SSL Server Test which provides an excellent view into the details of your deployed TLS, with recommendations for what configuration details can be made more secure. I believe it is also a great idea to schedule an automatic periodic report and enable notification of the relevant stakeholders whenever the results on this type of report change. We’re planning to experiment with some open source utilities to help us set this type of monitoring up in the near future, such as testssl.sh.

While you’re at it, review other TLS best practices and strengthen your systems even more

A lot of great progress has been made in recent years regarding TLS security on the internet. While you’re reviewing and updating your basic protocol support, consider also strengthening your security even more with some additional standard tools such as CAA, OCSP, DNSSEC, HSTS, Preload Lists, Let’s Encrypt, and CT Monitoring. Read the full article

[lohngoron]

TLS 1.0 Disablement: What You Need to Know

Paubox ended support for the TLS 1.0 encryption protocol today.

Paubox now supports TLS 1.1 and 1.2 only.

PCI Compliance requires ending use of TLS 1.0 by 30 June 2018.

SSLv2, SSLv3 and TLS 1.0 are insecure protocols and are not supported.

The impact of the TLS 1.0 disablement will be minimal to customers and end users.

As previously announced, we ended support for the TLS 1.0 encryption protocol today.

Its more secure successor, TLS 1.1, will be the new minimum standard security protocol used by Paubox. We are doing this in order to align with industry-wide best practices for security and data integrity.

The impact of the TLS 1.0 disablement will be minimal to the end user.

What is TLS? (What is TLS 1.0?)

TLS, short for Transport Layer Security, is an encryption protocol that protects messages in transit from one server to another. The encryption protocol deploys whenever a web browser or application transmits data over a network.

All Paubox network traffic, whether it contains PHI or not, is encrypted using industry-standard transport encryption (TLS). TLS prevents emails from being read while in motion and ensures the communication is delivered to the appropriate recipient.

Currently, TLS has three versions: TLS 1.0, 1.1 and 1.2.

As an aside, there is a TLS 1.3 protocol. It’s a working draft however, with incomplete details.

Why is this happening?

At Paubox, we prioritize user experience, but not at the expense of security.

TLS 1.0 is vulnerable to a few attacks, such as the POODLE (Padding Oracle On Downgraded Legacy Encryption) and BEAST (Browser Exploit Against SSL/TLS).

RELATED: Make a Plan for the Middle Man

TLS 1.1 and 1.2, on the other hand, have no known weaknesses.

We are also acting in accordance with the PCI DSS (Payment Card Industry Data Security Standard). The PCI requires that TLS 1.0 no longer be used for secure communications, giving companies until 30 June 2018 to make the transition.

With this upgrade to TLS 1.1, you can continue sending encrypted HIPAA-compliant email with confidence that the highest security standards are in place and your sensitive information is safe.

Qualsys SSL Server Test screenshot of www.paubox.com

[studyblxg]

TLS 1.0 Disablement: What You Need to Know

Paubox ended support for the TLS 1.0 encryption protocol today.

Paubox now supports TLS 1.1 and 1.2 only.

PCI Compliance requires ending use of TLS 1.0 by 30 June 2018.

SSLv2, SSLv3 and TLS 1.0 are insecure protocols and are not supported.

The impact of the TLS 1.0 disablement will be minimal to customers and end users.

As previously announced, we ended support for the TLS 1.0 encryption protocol today.

Its more secure successor, TLS 1.1, will be the new minimum standard security protocol used by Paubox. We are doing this in order to align with industry-wide best practices for security and data integrity.

The impact of the TLS 1.0 disablement will be minimal to the end user.

What is TLS? (What is TLS 1.0?)

TLS, short for Transport Layer Security, is an encryption protocol that protects messages in transit from one server to another. The encryption protocol deploys whenever a web browser or application transmits data over a network.

All Paubox network traffic, whether it contains PHI or not, is encrypted using industry-standard transport encryption (TLS). TLS prevents emails from being read while in motion and ensures the communication is delivered to the appropriate recipient.

Currently, TLS has three versions: TLS 1.0, 1.1 and 1.2.

As an aside, there is a TLS 1.3 protocol. It’s a working draft however, with incomplete details.

Why is this happening?

At Paubox, we prioritize user experience, but not at the expense of security.

TLS 1.0 is vulnerable to a few attacks, such as the POODLE (Padding Oracle On Downgraded Legacy Encryption) and BEAST (Browser Exploit Against SSL/TLS).

RELATED: Make a Plan for the Middle Man

TLS 1.1 and 1.2, on the other hand, have no known weaknesses.

We are also acting in accordance with the PCI DSS (Payment Card Industry Data Security Standard). The PCI requires that TLS 1.0 no longer be used for secure communications, giving companies until 30 June 2018 to make the transition.

With this upgrade to TLS 1.1, you can continue sending encrypted HIPAA-compliant email with confidence that the highest security standards are in place and your sensitive information is safe.

Qualsys SSL Server Test screenshot of http://www.paubox.com

Source: https://www.paubox.com/blog/tls-1-0-disablement-need-know