Thank you for the quick response Stefan. I did pursue Option #2, but only adding a KexAlgorithms section to /etc/ssh/sshd_config on the server.
Here is my sshd_config (with KexAlgorithms commented out, to re-enable regular ssh connections)
# Package generated configuration file # See the sshd_config(5) manpage for details
# What ports, IPs and protocols we listen for Port 22 # Use these options to restrict which interfaces/protocols sshd will bind to #ListenAddress :: #ListenAddress 0.0.0.0 Protocol 2 # HostKeys for protocol version 2 HostKey /etc/ssh/ssh_host_rsa_key HostKey /etc/ssh/ssh_host_dsa_key HostKey /etc/ssh/ssh_host_ecdsa_key HostKey /etc/ssh/ssh_host_ed25519_key #Privilege Separation is turned on for security UsePrivilegeSeparation yes
# Lifetime and size of ephemeral version 1 server key KeyRegenerationInterval 3600 ServerKeyBits 1024
# Logging SyslogFacility AUTH LogLevel INFO
# Authentication: LoginGraceTime 120 PermitRootLogin without-password StrictModes yes
# KexAlgorithms # curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
RSAAuthentication yes PubkeyAuthentication yes #AuthorizedKeysFile %h/.ssh/authorized_keys
# Don't read the user's ~/.rhosts and ~/.shosts files IgnoreRhosts yes # For this to work you will also need host keys in /etc/ssh_known_hosts RhostsRSAAuthentication no # similar for protocol version 2 HostbasedAuthentication no # Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication #IgnoreUserKnownHosts yes
# To enable empty passwords, change to yes (NOT RECOMMENDED) PermitEmptyPasswords no
# Change to yes to enable challenge-response passwords (beware issues with # some PAM modules and threads) ChallengeResponseAuthentication no
# Change to no to disable tunnelled clear text passwords #PasswordAuthentication yes
# Kerberos options #KerberosAuthentication no #KerberosGetAFSToken no #KerberosOrLocalPasswd yes #KerberosTicketCleanup yes
# GSSAPI options #GSSAPIAuthentication no #GSSAPICleanupCredentials yes
X11Forwarding yes X11DisplayOffset 10 PrintMotd no PrintLastLog yes TCPKeepAlive yes #UseLogin no
#MaxStartups 10:30:60 #Banner /etc/issue.net
# Allow client to pass locale environment variables AcceptEnv LANG LC_*
Subsystem sftp /usr/lib/openssh/sftp-server
# Set this to 'yes' to enable PAM authentication, account processing, # and session processing. If this is enabled, PAM authentication will # be allowed through the ChallengeResponseAuthentication and # PasswordAuthentication. Depending on your PAM configuration, # PAM authentication via ChallengeResponseAuthentication may bypass # the setting of "PermitRootLogin without-password". # If you just want the PAM account and session checks to run without # PAM authentication, then enable this but set PasswordAuthentication # and ChallengeResponseAuthentication to 'no'. UsePAM yes
Thank you again for your time and expertise.
- Karl
De : x2go-user-bounces@lists.x2go.org <x2go-user-bounces@lists.x2go.org> de la part de Stefan Baur <X2Go-ML-1@baur-itcs.de> Envoyé : vendredi 29 janvier 2016 08:50 À : x2go-user@lists.x2go.org Objet : Re: [X2Go-User] kex error
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256
Am 29.01.2016 um 17:37 schrieb KARL A. WOELFER:
Thank you Klaus - I added the workaround, on the Debian 8 x2go server workstation, but now all ssh connections are refused.
x2go client says "Connection refused".
Is there something more to do?
I see two options/workarounds listed at http://permalink.gmane.org/gmane.linux.terminal-server.x2go.user/2368
- I'm assuming you went for the second option, is that correct?
If so, a copy of your /etc/ssh/sshd_config would greatly aid in helping you resolve this.
- -Stefan
BAUR-ITCS UG (haftungsbeschränkt) Geschäftsführer: Stefan Baur Eichenäckerweg 10, 89081 Ulm | Registergericht Ulm, HRB 724364 Fon/Fax 0731 40 34 66-36/-35 | USt-IdNr.: DE268653243 -----BEGIN PGP SIGNATURE----- Version: GnuPG v2
iQEcBAEBCAAGBQJWq5hZAAoJEG7d9BjNvlEZaBoIAJQKmP8EqhtxqF1d1A09YCfq KHn8zZ2pE7UPeQAaTk/VTBSk2UPruN1yqAIU3v8nZsYgSGlL5CsS+T+RhByf6ND1 vRVvfvRJ2a4y68EeXHRz3E5OgD7XsWwNtIh4gqbbQj+bM9AqGe+Ho226Zb6ZyHZ2 VWH4Pc8qXI5ftybJTboMNE0U9sIM5zs0jkDYWNWvkBXszXmqUaekN/rPk256q76Y eT0VsLN1AptQYII0xwgHYF7pMrLfUERJ51FO81Zwj+l+J0mye6E08vAAE5plflXE ds2YJHpQbaJQLIDunWX34fx0lqSlw9/WMEONtpxvGbrZBhpnHb4R0Wp/EmJ7Lq0= =tjf8 -----END PGP SIGNATURE-----
x2go-user mailing list x2go-user@lists.x2go.org http://lists.x2go.org/listinfo/x2go-user