On 11/14/2015 02:22 PM, Neil Bothwick wrote: > On Sat, 14 Nov 2015 08:54:38 -0700, the...@sys-concept.com wrote: > >> The only software that uses ssh-dss key and I need is nxserver. >> >> I just added a line to my: sshd_config >> PubkeyAcceptedKeyTypes=+ssh-dss > > You should add this to a Host section, so it only enables the wek > encryption for that host. > >> restarted "sshd and nxserver" but I nxserver still doesn't work, >> running: nxsetup --test (I get): >> >> ----> Testing your nxserver connection ... >> Permission denied (publickey,password,keyboard-interactive). >> Fatal error: Could not connect to NX Server. > > That doesn't look like the error you get from an unsupported key, which > is something like > > Unable to negotiate with x.x.x.x: no matching host key type found. Their > offer: ssh-dss > > Is nxserver trying to connect as root? It looks more like the disabling > of passworded root logins in OpenSSH.
Here is my sshd_config: (nxserver works with openssh-6.9_p1-r2) As soon as I upgrade to openssh-7, enable: PubkeyAcceptedKeyTypes=+ssh-dss restart: sshd and nxserver gives me an error message (like above). Yes, I'm running "nxsetup --test" as root. # $OpenBSD: sshd_config,v 1.95 2015/04/27 21:42:48 djm Exp $ # This is the sshd server system-wide configuration file. See # sshd_config(5) for more information. # This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin # The strategy used for options in the default sshd_config shipped with # OpenSSH is to specify options with their default value where # possible, but leave them commented. Uncommented options override the # default value. #Port 22 #AddressFamily any #ListenAddress 0.0.0.0 #ListenAddress :: # The default requires explicit activation of protocol 1 #Protocol 2 # HostKey for protocol version 1 #HostKey /etc/ssh/ssh_host_key # 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 # Lifetime and size of ephemeral version 1 server key #KeyRegenerationInterval 1h #ServerKeyBits 1024 # Ciphers and keying #RekeyLimit default none # Logging # obsoletes QuietMode and FascistLogging #SyslogFacility AUTH #LogLevel INFO # Authentication: #LoginGraceTime 2m #PermitRootLogin no #StrictModes yes #MaxAuthTries 6 #MaxSessions 10 #RSAAuthentication yes #PubkeyAuthentication yes # The default is to check both .ssh/authorized_keys and .ssh/authorized_keys2 # but this is overridden so installations will only check .ssh/authorized_keys #AuthorizedKeysFile .ssh/authorized_keys # Added Nov 14/15, needed for nxserver to work # PubkeyAcceptedKeyTypes=+ssh-dss #AuthorizedPrincipalsFile none #AuthorizedKeysCommand none #AuthorizedKeysCommandUser nobody # For this to work you will also need host keys in /etc/ssh/ssh_known_hosts #RhostsRSAAuthentication no # similar for protocol version 2 #HostbasedAuthentication no # Change to yes if you don't trust ~/.ssh/known_hosts for # RhostsRSAAuthentication and HostbasedAuthentication #IgnoreUserKnownHosts no # Don't read the user's ~/.rhosts and ~/.shosts files #IgnoreRhosts yes # To disable tunneled clear text passwords, change to no here! PasswordAuthentication yes #PermitEmptyPasswords no # Change to no to disable s/key passwords #ChallengeResponseAuthentication yes # Kerberos options #KerberosAuthentication no #KerberosOrLocalPasswd yes #KerberosTicketCleanup yes #KerberosGetAFSToken no # GSSAPI options #GSSAPIAuthentication no #GSSAPICleanupCredentials yes # 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 #AllowAgentForwarding yes #AllowTcpForwarding yes #GatewayPorts no X11Forwarding yes #X11DisplayOffset 10 #X11UseLocalhost yes #PermitTTY yes PrintMotd no PrintLastLog no #TCPKeepAlive yes #UseLogin no UsePrivilegeSeparation sandbox # Default for new installations. #PermitUserEnvironment no #Compression delayed #ClientAliveInterval 0 #ClientAliveCountMax 3 #UseDNS no #PidFile /run/sshd.pid #MaxStartups 10:30:100 #PermitTunnel no #ChrootDirectory none #VersionAddendum none # no default banner path #Banner none # here are the new patched ldap related tokens # entries in your LDAP must have posixAccount & ldapPublicKey objectclass #UseLPK yes #LpkLdapConf /etc/ldap.conf #LpkServers ldap://10.1.7.1/ ldap://10.1.7.2/ #LpkUserDN ou=users,dc=phear,dc=org #LpkGroupDN ou=groups,dc=phear,dc=org #LpkBindDN cn=Manager,dc=phear,dc=org #LpkBindPw secret #LpkServerGroup mail #LpkFilter (hostAccess=master.phear.org) #LpkForceTLS no #LpkSearchTimelimit 3 #LpkBindTimelimit 3 #LpkPubKeyAttr sshPublicKey # override default of no subsystems Subsystem sftp /usr/lib64/misc/sftp-server # the following are HPN related configuration options # tcp receive buffer polling. disable in non autotuning kernels #TcpRcvBufPoll yes # disable hpn performance boosts #HPNDisabled no # buffer size for hpn to non-hpn connections #HPNBufferSize 2048 # allow the use of the none cipher #NoneEnabled no # Example of overriding settings on a per-user basis #Match User anoncvs # X11Forwarding no # AllowTcpForwarding no # PermitTTY no # ForceCommand cvs server # Allow client to pass locale environment variables #367017 AcceptEnv LANG LC_* -- Thelma
