Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I am using a Cisco SSL VPN client to connect from a 32-bit Ubuntu 11.04 computer to a 32-bit Windows 7 computer. When I request an RDP session from the SSL VPN site, the properJavaRDP plugin fires up, makes a connection to the server, and then returns the following error:

Connection Exception Wrong Modulus size! Expected64+8got:264

My session can never get past that point. Has anyone seen this error before and have any clue how to resolve it? Thanks!

share|improve this question
up vote 0 down vote accepted

Here's some more information that might be helpful,

Cisco ASA - Java RDP Error - Connection Exception Wrong modulus size

share|improve this answer
Welcome to Server Fault, Pete. We advise against answers here that purely link off-site. Please consider pasting the relevant information into your answer here - that way, if the site you linked to ever goes down the solution is not lost. Also, please give our FAQ the once over, especially the Can I use a signature or tagline? section. – Ben Pilbrow May 23 '11 at 19:56

The properJavaRDP plugin will not work with Windows 7. The Cisco rdp2 plugin needs to be installed on the ASA.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.