Algorithm negotiation fail message when deploying to ESX UNIX servers (NETIQKB71823)

  • 7771823
  • 15-Sep-2009
  • 18-Mar-2010


UNIX Manager 5.6
UNIX Manager 7.1
Vmware ESX Server

Not VMware ESXi server


While deploying to ESX hosts through the UNIX Manager you might receive:

com.jcraft.jsch.JSchException: Algorithm negotiation fail


To fix this issue:

1) find and comment out the following line in the /etc/ssh/sshd_config file:

Ciphers aes-256-cbc,aes-128-cbc

2) Restart the ssh server:

/etc/init.d/sshd restart


Some versions of Vmware ESX server limit the possible ssh ciphers to a set which the UNIX Manager does not support.

Additional Information

Formerly known as NETIQKB71823