12-08-2011 05:17 AM
I have a cisco ace loadbalancer and a server farm behind it.
We have implemented sll-to-ssl termination, but we are facing certain problems with opera browser and android mobiles.
On both we get "The server does not support secure TLS renegoriation...."
Running the following: openssl s_client -connect aaa.bbb.ccc.ddd:443
On the load balancer we get:
New, TLSv1/SSLv3, Cipher is AES256-SHA
Server public key is 1024 bit
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
SSL-Session:
Protocol : TLSv1
Cipher : AES256-SHA
Session-ID:
Session-ID-ctx:
Master-Key: xxxxxxxxx
Key-Arg : None
Krb5 Principal: None
Start Time: 1323349587
Timeout : 300 (sec)
Verify return code: 21 (unable to verify the first certificate)
On one of the servers from the farm we get:
ew, TLSv1/SSLv3, Cipher is DHE-RSA-AES256-SHA
Server public key is 1024 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
SSL-Session:
Protocol : TLSv1
Cipher : DHE-RSA-AES256-SHA
Session-ID: yyyyyyy
Session-ID-ctx:
Master-Key: xxxxxxxx
Key-Arg : None
Krb5 Principal: None
Start Time: 1323349689
Timeout : 300 (sec)
Verify return code: 0 (ok)
Is there any connection to our problem with this outputs ?
Does anyone have any idea on how to solve this problem ?
Thanks in advance
12-09-2011 02:53 AM
Hi Thanassis,
TLS renegotiation was disabled in all Cisco devices due to a vulnerability of the protocol. Check
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b01d1d.shtml for more details
Since the renegotiation was disabled for security reasons, there is no way to enable it back, so you should rather be looking for a way to force your browsers not to require this option to be enabled. I would suggest you to contact the Opera support team.
Regards
Daniel
12-13-2011 03:06 AM
I am not aware of any Cisco ACE version that supports RFC 5746, unfortunately.
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