I/O Error: java.lang.RuntimeException: Could not generate DH keypair

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I/O Error: java.lang.RuntimeException: Could not generate DH keypair

Eric-Christian Koch
Hello

I'm getting the following error:

Target: https://www.dextra.ch
I/O Error: java.lang.RuntimeException: Could not generate DH keypair


Any idea why that could be?


Best regards
Eric
-- 
Eric-Christian Koch
Mitglied der Geschäftsleitung, p.p.a.

sum.cumo GmbH
Office Hamburg
Borsteler Bogen 27 B
22453 Hamburg

Telefon +49.40.6094371-19
Telefax +49.40.6094371-34
E-Mail  [hidden email]

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Re: I/O Error: java.lang.RuntimeException: Could not generate DH keypair

Andreas Riddering
Hi Eric,

as you can see the validator is written in Java.
As you might know, you have secured your website quite good: https://www.ssllabs.com/ssltest/analyze.html?d=dextra.ch

But as you can see there, Java simply can't connect to your site because of the strong DH params or no other supported suite available. I don't know which Java Version the validator is writen in, but try using 2048 Bit DH params. That might help.

Another option would be to (maybe only temporarly) enable another ciper suite, so Java can connect to your server...

As I am using Apache too, just kindly let me know, if i could help you with the SSL settings. I could tell you the cipher suites i used...

Beste Grüße

2015-12-10 10:27 GMT+01:00 Eric-Christian Koch <[hidden email]>:
Hello

I'm getting the following error:

Target: https://www.dextra.ch
I/O Error: java.lang.RuntimeException: Could not generate DH keypair


Any idea why that could be?


Best regards
Eric
-- 
Eric-Christian Koch
Mitglied der Geschäftsleitung, p.p.a.

sum.cumo GmbH
Office Hamburg
Borsteler Bogen 27 B
22453 Hamburg

Telefon <a href="tel:%2B49.40.6094371-19" value="+4940609437119" target="_blank">+49.40.6094371-19
Telefax <a href="tel:%2B49.40.6094371-34" value="+4940609437134" target="_blank">+49.40.6094371-34
E-Mail  [hidden email]