woogony
1 Copper

Using virtual console, Network connection has dropped

I try to enter our server using Virtual console,
but problem comes up.
'The viewer has terminated
Reason : The network connection has been dropped.'

 

I used well virtual console until yesterday..
but, the error message pop up today

 

 
in all server models (R620, R630, R710 ... ) and both iDRAC version (iDRAC7 and iDRAC8), 
There is a same error.

 

 
additionally, If using my colleague's computer, it works well.
i think there is a problem in my computer.. but i don't know what problem is...

 

 
i try below various solutions
- reset idrac
- adjusting network configuration (auto negotiation...)
- etc (i'm searching about this problem)
 
 
I use macbook.

 

please tell me how the problem fix.
Thanks,
0 Kudos
13 Replies
Olivier_sysadm
1 Copper

Re: Using virtual console, Network connection has dropped

Same problem for me.

My last action before it stops working was updating Java on my macbook...

Any solution ?

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erictech
1 Nickel

Re: Using virtual console, Network connection has dropped

Same here. It's definitely a Java security issue. However, not sure who is responsible to fix it...Dell or Oracle?

I used to be able to find older versions of Java and re-install them as a workaround, but it seems they have made this nearly impossible. 

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erictech
1 Nickel

Re: Using virtual console, Network connection has dropped

found it. try this: http://www.oracle.com/technetwork/java/javase/downloads/java-archive-javase8-2177648.html

i installed jre 8 update 162 and now the iDRAC virtual console is working again!

of course, this version won't have the latest security updates.

i noticed that my windows firewall needed access again, so perhaps that's the problem with the latest version? maybe it changed executable names or something? i might look into that further.

ITGuyFromIA
1 Copper

Re: Using virtual console, Network connection has dropped

I ran into this issue last night, this thread helped get me out of a jam.

I did have to login to an oracle account (after first creating one) to download them, but the link you provided worked wonderfully.

Thanks

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Highlighted
C-GO
1 Nickel

Re: Using virtual console, Network connection has dropped

The issue was definitely caused by the Java update.  They've added a disablement of the 3DES_EDE_CBC TLS algorithm.  I was able to determine this by comparing the java.security files between a known working client system on an older version (161) and an up to date system (171).

Older (161):
jdk.tls.disabledAlgorithms=SSLv3, RC4, MD5withRSA, DH keySize < 1024, \
 EC keySize < 224, DES40_CBC, RC4_40

Newer (171):
jdk.tls.disabledAlgorithms=SSLv3, RC4, MD5withRSA, DH keySize < 1024, \
 EC keySize < 224, DES40_CBC, RC4_40, 3DES_EDE_CBC

If you search for the java.security files located in lib/security for each installation, you can comment the existing section then copy/paste without the algorithm:

Example Code:
#jdk.tls.disabledAlgorithms=SSLv3, RC4, MD5withRSA, DH keySize < 1024, \
# EC keySize < 224, DES40_CBC, RC4_40, 3DES_EDE_CBC
jdk.tls.disabledAlgorithms=SSLv3, RC4, MD5withRSA, DH keySize < 1024, \
EC keySize < 224, DES40_CBC, RC4_40

Note: You may have to update multiple files if you've installed Java for 32 and 64-bit platforms.

Save your file(s), close and re-open your browsers, and everything tests out fine.

Enjoy, and be sure to tip your waitress!! :-)

-C-GO

edigital
1 Copper

Re: Using virtual console, Network connection has dropped

Hello,

The newest iDRAC update solved my problem: 2.60.60.60

Regards,
Csabi

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kkaushal17
1 Copper

Re: Using virtual console, Network connection has dropped

Kudos!!! 
It worked like charm

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oRAirwolf
2 Iron

Re: Using virtual console, Network connection has dropped

@C-GO

Thank you sooooooooooooooooooooo much for this!!!  I have three R420's that I keep on iDRAC 1.66.65 because I use them in my office and the fan curves changed when Dell upgraded to iDRAC 8 2.xx.  They are much, much louder on newer versions.  That latest Java update made it where I had a dedicated VM with an older version of Java installed just so I could run iDRAC.  You have just made my life a lot easier!

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sebastian950
1 Copper

Re: Using virtual console, Network connection has dropped

WORKING!!!!

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