Out of the blue, my Glassfish server stoped accepting TLSs other than 1.0, which is deprecated. I can't even access admin console since browsers won't accept this kind of security.
When I run openssl s_client -connect localhost:4848 (admin console), it presents only TLSv1.0 protocol.
I'm not being able to restore TLS1.2. Since I need this protocol to connect to external API services, I'm in serious trouble.
I've searched a lot, but no success in solving this issue.
When I try to access my console, I get this message from the browser:
This site can’t provide a secure connection
<MY_SITE> uses an unsupported protocol.
ERR_SSL_VERSION_OR_CIPHER_MISMATCH
Any help is appreciated.
Thanks.
Related
I have installed an SSL certificate I generated from Let's Encrypt using Nginx Proxy Manager. The cert works great on everything except Safari! I get a "cannot parse response" in Safari.
My setup is as following:
I have ports 80/443 open to my NPM instance, where I then proxy over to the correct machine running the web server. I have HTTPS forced for eataupa.com and also HTTPS forced between NPM and my web server. I am not sure if Im suppose to run this inside connection between NPM HTTPs or HTTP.
Either way eataupa.com works fine unless its safari and im tearing my hair out trying to fix it!
Please help, thanks so much!
I see some error produced here I just dont know how to interpret and fix it.
https://www.ssllabs.com/ssltest/analyze.html?d=eataupa.com
This is an answer from a TLS stand point, I cannot tell you which config to change since I am not familiar with your applications.
The Safari versions that could not connect to your website probably do not support the security requirements such as the protocol version and many other things such as cipher suites.
This most likely occurs because of the ciphers, as Safari 8 seems to support TLS 1.2 but it still fails to perform the TLS handshake.
Here are the list of Safari 8 ciphers: https://www.ssllabs.com/ssltest/viewClient.html?name=Safari&version=8&platform=iOS%208.4
And you would sometimes need the OpenSSL interpretation of them: https://testssl.sh/openssl-iana.mapping.html
You need to configure your server to use one of the cipher suites that those safari versions support.
Recently, we have encountered a problem while installing one of our applications for a customer. During installation the application needs to perform some requests to our cloud service and we realised it could not establish HTTPS connection: the very TLS handshake failed. After researching a bit we found the server was a Windows Server 2008 which does not support TLS v1.2, which is the minimum required to connect to our servers. There are some workarounds (this one, for instance) but none of them worked. In addition, we cannot install any update to that windows due to customer policies.
While looking for a solution, using wireshark, we noticed that our program tried to connect using TLS v1.2 and failed, but Chrome browser was able to connect to the same cloud server using TLS v1.3, which is not even supported in Windows Server 2008. From that we deduced that Chrome is likely using its own TLS stack to establish the connection.
I am wondering that if Chrome is doing that, we should also be able to do the same. The application is developed in .Net Core and I have googled a lot looking for information on how to do this, and I've found lots of information on how to configure TLS certificates in .Net Core, but none on replacing the TLS stack with, say, OpenSSL or others. I do know this is possible in Java, so is it possible to replace the TLS stack in .Net core?
.NET Core itself doesn't let you plug in your own crypto stack.
You pointed to Bouncy Castle as an example of Java letting you use an alternate crypto stack; there's a port of Bouncy Castle to C#/.NET as well.
Their source code has a test case that demonstrates how to write a TLS client using Bouncy Castle:
https://github.com/bcgit/bc-csharp/blob/master/crypto/test/src/crypto/tls/test/TlsClientTest.cs
Recently, I tried to access one special bizarre https server with python requests library and it always reported handshake_failure. However, I can access it with browser.
After some debugging with wireshark, I found the server refused the first clientHello directly. I knew there may be some bizarre behavior for that server.
What i ask is that how to customize ssl handshake routine to identify what exactly caused the server to refuse my clientHello?
For example,
I want to add some extensions as the browser does during ssl handshake.
Thanks!
For my current project i need to implement http over tls at client ,for this i need a local server able to simulate this . is there any online or offline tool. which i can use and and see the handshake in wireshark .
For watching the TLS handshake you might not get far enough with wireshark. For such kind of monitoring you would ensure the security is low enough for wireshark to be able getting the session key from watching the handshake for decoding the later parts. Thus, you need to avoid any forward secrecy.
Otherwise any (https) server that is accessible (and willing to talk) to your client will do.
In case you are in an environment that is supported (e.g. any unix/linux), you might try using openssl. It allows setting up a server that will do handshake. And it will log the handshake such that you will be able looking at what is going on. This will eliminate the need for using wireshark for debugging.
For achieving this you need a Web Server accepting connection over TLS.I have achieved this on Apache Tomcat web Server.
TLS configuration needs to be done in the server.xml file present in config directory of Tomcat webserver. Connector tag needs to be added in the server.xml file that contains information like
TLS version to be used, port, List of supported Cipher Suites, Keystore path and password, Truststore path and password.
Any regular Rest client can be used to make a call like Postman client. But to use that over TLS/SSL certificate is needed to be installed in Chrome browser.
Hope this answers your doubt.
We are facing a problem and I am sure this is the right place. We have a load balancer (cisco's) and for various reasons the SSL configuration on the load balancer (the server) side is set to use "SSLv3" protocol version. Now after setting the same, when I access the load balancer in CHROME browser, I am able to access the pages but I do see the below message when I click on their security icon.
"connection had to be retried using ssl 3.0" - I looked at the packet capture using wireshark and I see that browser tries TLSv1 and receives a "fatal alert" from the server saying "protocol_version" and then immediately browser tries SSLv3 version and finishes the handshake. So browser is able to negotiate this as a client.
However when I set up a stand alone java (tried using 1.6 as well as 1.7) client from eclipse and try connecting to the server I am getting the below exception.
: Received fatal alert: protocol_version javax.net.ssl.SSLException: Received fatal alert: protocol_version
As per various documentations, I saw two options I have
to set https.protocol system property to SSLv3. [this works for us, but the problem is it is affects the outbound SSL calls globally. I have another outbound SSL call to another server which does not work with SSLv3]
setEnabledprotocols() - this works as well but sometimes, we dont have access to the socket directly (sometime we generates stubs using third party and the stub takes care of the low level connection stuff, so no access to that socket).
But my actual question is, If by default TLSv1/SSLv3 and SSLv2Hello(just the format I believe) are enabled in java, why is JSSE implementation not able to negotiate like how chrome browser is able to negotiate. Is this expected? If browser is doing it, I believe it should be part of some SSL RFC and if that is the case, same functionality of this "negotiation" should be provided by java itself right?
I did go through this http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/6-b14/sun/security/ssl/SSLSocketImpl.java and was not able to find any part for this negotiation during handshake.
Is there a possibility of issue from the server side (load balancer) that i. I see that server sends fatal alert but that being cisco I believe the ssl implementation should be perfect and that is expected. Am I wrong?
Issue happens both in java 1.6 and 1.7. Do let me know if more information would be required to answer, will be happy to help.