Xmanager Getting Error "No matching outgoing encryption algorithm found"

Solution Verified - Updated -

Environment

  • Red Hat Enterprise Linux 6
  • Xmanager build 193

Issue

  • I using XManager login on desktop/Laptop to RHEL 6.5 but i'm getting Re: "No matching outgoing encryption algorithm found"

Resolution

/etc/ssh/sshd_config
#Ciphers aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,arcfour
  • Check again the connection and the cipher in Xmanager and try again to connect

Root Cause

/etc/ssh/sshd_config
Ciphers
Specifies the ciphers allowed for protocol version 2. Multiple
ciphers must be comma-separated. The supported ciphers are:

               3des-cbc
               aes128-cbc
               aes192-cbc
               aes256-cbc
               aes128-ctr
               aes192-ctr
               aes256-ctr
               aes128-gcm@openssh.com
               aes256-gcm@openssh.com
               arcfour
               arcfour128
               arcfour256
               blowfish-cbc
               cast128-cbc
               chacha20-poly1305@openssh.com

         The default is:

               aes128-ctr,aes192-ctr,aes256-ctr,
               aes128-gcm@openssh.com,aes256-gcm@openssh.com,
               chacha20-poly1305@openssh.com

Xmanager build 193 and lower have a bug this bug is fixed in the next release 194
FIX: [Xshell] Encryption algorithm aes256-ctr added (No matching outgoing encryption algorithm found)
Causing the Xmanager can negotiate the algorithm with sshd server

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