tikenn
Cadet
- Joined
- Nov 10, 2020
- Messages
- 6
I recently set up a FreeIPA system on CentOS 8 to provide identity management for my TrueNAS server using Kerberos as the authentication protocol and LDAP for directory management. However, while the LDAP setup with kerberos works, I have been unsuccessful in logging into the server with SSH using my kerberos tickets. My Basic setup is below:
Although the SSH response suggests that the credentials are incorrect, I can use the exact same method to log in to other servers on the network (albiet not TrueNAS servers). I attempted to enforce [libdefaults] in the Kerberos Settings on TrueNAS similar to my other servers by adding in config parameters to the Libdefaults Auxiliary Parameters section in TrueNAS:
Sadly, I have still not been able to get a successful SSH and was wondering if someone had any suggestions. I would be more than happy to provide any additional information and apologies upfront if something is missing as I am new to FreeIPA and its integration with TrueNAS.
- FreeIPA (version: 4.8.4)
- REALM: ANAX.ODONATA.LOCALDOMAIN
- KDC: anax.odonata.localdomain
- Admin Server: anax.odonata.localdomain
- Password Server: anax.odonata.localdomain
- TrueNAS (version: TrueNAS-12.0-RELEASE)
- Domain: vestalis.odonata.localdomain
- host/vestalis.odonata.localdomain@ANAX.ODONATA.LOCALDOMAIN
- keytab:
ipa-getkeytab -s anax.odonata.localdomain -p host/vestalis.odonata.localdomain -k ./vestalis.odonata.localdomain.keytab
- keytab:
- ldap/vestalis.odonata.localdomain@ANAX.ODONATA.LOCALDOMAIN
- keytab:
ipa-getkeytab -s anax.odonata.localdomain -p ldap/vestalis.odonata.localdomain -k ./ldap.vestalis.odonata.localdomain.keytab
- keytab:
Code:
kinit tikenn ssh -K vestalis.odonata.localdomain -p 6498 -vvv
Code:
OpenSSH_8.2p1 Ubuntu-4ubuntu0.1, OpenSSL 1.1.1f 31 Mar 2020 debug1: Reading configuration data /home/tikenn/.ssh/config debug1: /home/tikenn/.ssh/config line 199: Applying options for * debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: include /etc/ssh/ssh_config.d/*.conf matched no files debug1: /etc/ssh/ssh_config line 21: Applying options for * debug2: resolving "vestalis.odonata.localdomain" port 6498 debug2: ssh_connect_direct debug1: Connecting to vestalis.odonata.localdomain [192.168.2.7] port 6498. debug1: Connection established. debug1: identity file /home/tikenn/.ssh/id_rsa type -1 debug1: identity file /home/tikenn/.ssh/id_rsa-cert type -1 debug1: identity file /home/tikenn/.ssh/id_dsa type -1 debug1: identity file /home/tikenn/.ssh/id_dsa-cert type -1 debug1: identity file /home/tikenn/.ssh/id_ecdsa type -1 debug1: identity file /home/tikenn/.ssh/id_ecdsa-cert type -1 debug1: identity file /home/tikenn/.ssh/id_ecdsa_sk type -1 debug1: identity file /home/tikenn/.ssh/id_ecdsa_sk-cert type -1 debug1: identity file /home/tikenn/.ssh/id_ed25519 type -1 debug1: identity file /home/tikenn/.ssh/id_ed25519-cert type -1 debug1: identity file /home/tikenn/.ssh/id_ed25519_sk type -1 debug1: identity file /home/tikenn/.ssh/id_ed25519_sk-cert type -1 debug1: identity file /home/tikenn/.ssh/id_xmss type -1 debug1: identity file /home/tikenn/.ssh/id_xmss-cert type -1 debug1: Local version string SSH-2.0-OpenSSH_8.2p1 Ubuntu-4ubuntu0.1 debug1: Remote protocol version 2.0, remote software version OpenSSH_8.2-hpn14v15 debug1: match: OpenSSH_8.2-hpn14v15 pat OpenSSH* compat 0x04000000 debug2: fd 3 setting O_NONBLOCK debug1: Authenticating to vestalis.odonata.localdomain:6498 as 'tikenn' debug3: put_host_port: [vestalis.odonata.localdomain]:6498 debug3: hostkeys_foreach: reading file "/home/tikenn/.ssh/known_hosts" debug3: record_hostkey: found key type ECDSA in file /home/tikenn/.ssh/known_hosts:36 debug3: load_hostkeys: loaded 1 keys from [vestalis.odonata.localdomain]:6498 debug3: order_hostkeyalgs: prefer hostkeyalgs: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521 debug3: send packet: type 20 debug1: SSH2_MSG_KEXINIT sent debug3: receive packet: type 20 debug1: SSH2_MSG_KEXINIT received debug2: local client KEXINIT proposal debug2: KEX algorithms: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,ext-info-c debug2: host key algorithms: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,sk-ssh-ed25519-cert-v01@openssh.com,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,sk-ecdsa-sha2-nistp256@openssh.com,ssh-ed25519,sk-ssh-ed25519@openssh.com,rsa-sha2-512,rsa-sha2-256,ssh-rsa debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: compression ctos: none,zlib@openssh.com,zlib debug2: compression stoc: none,zlib@openssh.com,zlib debug2: languages ctos: debug2: languages stoc: debug2: first_kex_follows 0 debug2: reserved 0 debug2: peer server KEXINIT proposal debug2: KEX algorithms: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256 debug2: host key algorithms: rsa-sha2-512,rsa-sha2-256,ssh-rsa,ecdsa-sha2-nistp256,ssh-ed25519 debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: compression ctos: none debug2: compression stoc: none debug2: languages ctos: debug2: languages stoc: debug2: first_kex_follows 0 debug2: reserved 0 debug1: kex: algorithm: curve25519-sha256 debug1: kex: host key algorithm: ecdsa-sha2-nistp256 debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none debug3: send packet: type 30 debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug3: receive packet: type 31 debug1: Server host key: ecdsa-sha2-nistp256 SHA256:rnhULXrQf+tvt9uQf9Sqy+DC2FfOpMZWENaHP9qjODg debug3: put_host_port: [192.168.2.7]:6498 debug3: put_host_port: [vestalis.odonata.localdomain]:6498 debug3: hostkeys_foreach: reading file "/home/tikenn/.ssh/known_hosts" debug3: record_hostkey: found key type ECDSA in file /home/tikenn/.ssh/known_hosts:36 debug3: load_hostkeys: loaded 1 keys from [vestalis.odonata.localdomain]:6498 debug3: hostkeys_foreach: reading file "/home/tikenn/.ssh/known_hosts" debug3: record_hostkey: found key type ECDSA in file /home/tikenn/.ssh/known_hosts:37 debug3: load_hostkeys: loaded 1 keys from [192.168.2.7]:6498 debug1: Host '[vestalis.odonata.localdomain]:6498' is known and matches the ECDSA host key. debug1: Found key in /home/tikenn/.ssh/known_hosts:36 debug3: send packet: type 21 debug2: set_newkeys: mode 1 debug1: rekey out after 134217728 blocks debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug3: receive packet: type 21 debug1: SSH2_MSG_NEWKEYS received debug2: set_newkeys: mode 0 debug1: rekey in after 134217728 blocks debug1: Will attempt key: /home/tikenn/.ssh/id_rsa debug1: Will attempt key: /home/tikenn/.ssh/id_dsa debug1: Will attempt key: /home/tikenn/.ssh/id_ecdsa debug1: Will attempt key: /home/tikenn/.ssh/id_ecdsa_sk debug1: Will attempt key: /home/tikenn/.ssh/id_ed25519 debug1: Will attempt key: /home/tikenn/.ssh/id_ed25519_sk debug1: Will attempt key: /home/tikenn/.ssh/id_xmss debug2: pubkey_prepare: done debug3: send packet: type 5 debug3: receive packet: type 7 debug1: SSH2_MSG_EXT_INFO received debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,sk-ssh-ed25519@openssh.com,ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,sk-ecdsa-sha2-nistp256@openssh.com> debug3: receive packet: type 6 debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug3: send packet: type 50 debug3: receive packet: type 51 debug1: Authentications that can continue: publickey,gssapi-with-mic debug3: start over, passed a different list publickey,gssapi-with-mic debug3: preferred gssapi-with-mic,publickey,keyboard-interactive,password debug3: authmethod_lookup gssapi-with-mic debug3: remaining preferred: publickey,keyboard-interactive,password debug3: authmethod_is_enabled gssapi-with-mic debug1: Next authentication method: gssapi-with-mic debug3: send packet: type 50 debug2: we sent a gssapi-with-mic packet, wait for reply debug3: receive packet: type 51 debug1: Authentications that can continue: publickey,gssapi-with-mic debug3: send packet: type 50 debug2: we sent a gssapi-with-mic packet, wait for reply debug3: receive packet: type 51 debug1: Authentications that can continue: publickey,gssapi-with-mic debug2: we did not send a packet, disable method debug3: authmethod_lookup publickey debug3: remaining preferred: keyboard-interactive,password debug3: authmethod_is_enabled publickey debug1: Next authentication method: publickey debug1: Trying private key: /home/tikenn/.ssh/id_rsa debug3: no such identity: /home/tikenn/.ssh/id_rsa: No such file or directory debug1: Trying private key: /home/tikenn/.ssh/id_dsa debug3: no such identity: /home/tikenn/.ssh/id_dsa: No such file or directory debug1: Trying private key: /home/tikenn/.ssh/id_ecdsa debug3: no such identity: /home/tikenn/.ssh/id_ecdsa: No such file or directory debug1: Trying private key: /home/tikenn/.ssh/id_ecdsa_sk debug3: no such identity: /home/tikenn/.ssh/id_ecdsa_sk: No such file or directory debug1: Trying private key: /home/tikenn/.ssh/id_ed25519 debug3: no such identity: /home/tikenn/.ssh/id_ed25519: No such file or directory debug1: Trying private key: /home/tikenn/.ssh/id_ed25519_sk debug3: no such identity: /home/tikenn/.ssh/id_ed25519_sk: No such file or directory debug1: Trying private key: /home/tikenn/.ssh/id_xmss debug3: no such identity: /home/tikenn/.ssh/id_xmss: No such file or directory debug2: we did not send a packet, disable method debug1: No more authentication methods to try. tikenn@vestalis.odonata.localdomain: Permission denied (publickey,gssapi-with-mic).
Although the SSH response suggests that the credentials are incorrect, I can use the exact same method to log in to other servers on the network (albiet not TrueNAS servers). I attempted to enforce [libdefaults] in the Kerberos Settings on TrueNAS similar to my other servers by adding in config parameters to the Libdefaults Auxiliary Parameters section in TrueNAS:
Code:
default_etypes = aes256-cts-hmac-sha1-96 aes128-cts-hmac-sha1-96 default_etypes_des = aes256-cts-hmac-sha1-96 aes128-cts-hmac-sha1-96 default_realm = ANAX.ODONATA.LOCALDOMAIN dns_lookup_realm = false dns_lookup_kdc = true ticket_lifetime = 24h forwardable = true
Sadly, I have still not been able to get a successful SSH and was wondering if someone had any suggestions. I would be more than happy to provide any additional information and apologies upfront if something is missing as I am new to FreeIPA and its integration with TrueNAS.