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OpenSSH + Kerberos SSO：找不到主機/localhost.localdomain 的密鑰表條目
SSO 無法與 OpenSSH 一起使用 - 我無法讓 GSSAPIAuthentication 與 Kerberos 一起使用。每次我嘗試登錄時，都會不斷提示輸入密碼。
在故障排除期間，我在這裡啟動了調試：
[foster@kvm0007 ~]$ kinit Password for foster@MONZELL.COM: [foster@kvm0007 ~]$ ssh -p222 -K foster@kerberos.monzell.com -vvv OpenSSH_5.3p1, OpenSSL 1.0.0-fips 29 Mar 2010 debug1: Reading configuration data /home/users/foster/.ssh/config debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug2: ssh_connect: needpriv 0 debug1: Connecting to kerberos.monzell.com [192.168.15.100] port 222. debug1: Connection established. debug1: identity file /home/users/foster/.ssh/identity type -1 debug1: identity file /home/users/foster/.ssh/id_rsa type -1 debug3: Not a RSA1 key file /home/users/foster/.ssh/id_dsa. debug2: key_type_from_name: unknown key type '-----BEGIN' debug3: key_read: missing keytype debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug2: key_type_from_name: unknown key type '-----END' debug3: key_read: missing keytype debug1: identity file /home/users/foster/.ssh/id_dsa type 2 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3 debug1: match: OpenSSH_5.3 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.3 debug2: fd 3 setting O_NONBLOCK debug1: SSH2_MSG_KEXINIT sent debug3: Wrote 792 bytes for a total of 813 debug1: SSH2_MSG_KEXINIT received debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,zlib@openssh.com debug2: kex_parse_kexinit: none,zlib@openssh.com debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: mac_setup: found hmac-md5 debug1: kex: server->client aes128-ctr hmac-md5 none debug2: mac_setup: found hmac-md5 debug1: kex: client->server aes128-ctr hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug3: Wrote 24 bytes for a total of 837 debug2: dh_gen_key: priv key bits set: 132/256 debug2: bits set: 499/1024 debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug3: Wrote 144 bytes for a total of 981 debug3: put_host_port: [192.168.15.100]:222 debug3: put_host_port: [kerberos.monzell.com]:222 debug3: check_host_in_hostfile: filename /home/users/foster/.ssh/known_hosts debug3: check_host_in_hostfile: filename /etc/ssh/ssh_known_hosts debug3: check_host_in_hostfile: filename /home/users/foster/.ssh/known_hosts debug3: check_host_in_hostfile: filename /etc/ssh/ssh_known_hosts debug1: checking without port identifier debug3: check_host_in_hostfile: filename /home/users/foster/.ssh/known_hosts debug3: check_host_in_hostfile: match line 1 debug3: check_host_in_hostfile: filename /home/users/foster/.ssh/known_hosts debug3: check_host_in_hostfile: match line 1 debug1: Host 'kerberos.monzell.com' is known and matches the RSA host key. debug1: Found key in /home/users/foster/.ssh/known_hosts:1 debug1: found matching key w/out port debug2: bits set: 505/1024 debug1: ssh_rsa_verify: signature correct debug2: kex_derive_keys debug2: set_newkeys: mode 1 debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug3: Wrote 16 bytes for a total of 997 debug2: set_newkeys: mode 0 debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug3: Wrote 48 bytes for a total of 1045 debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: /home/users/foster/.ssh/identity ((nil)) debug2: key: /home/users/foster/.ssh/id_rsa ((nil)) debug2: key: /home/users/foster/.ssh/id_dsa (0x7fed559e5d30) debug3: Wrote 64 bytes for a total of 1109 debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password debug3: start over, passed a different list publickey,gssapi-keyex,gssapi-with-mic,password 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: Trying to reverse map address 192.168.15.100. debug2: we sent a gssapi-with-mic packet, wait for reply debug3: Wrote 96 bytes for a total of 1205 debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password debug2: we sent a gssapi-with-mic packet, wait for reply debug3: Wrote 96 bytes for a total of 1301 debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password debug2: we sent a gssapi-with-mic packet, wait for reply debug3: Wrote 96 bytes for a total of 1397 debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password debug2: we sent a gssapi-with-mic packet, wait for reply debug3: Wrote 96 bytes for a total of 1493 debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password 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/users/foster/.ssh/identity debug3: no such identity: /home/users/foster/.ssh/identity debug1: Trying private key: /home/users/foster/.ssh/id_rsa debug3: no such identity: /home/users/foster/.ssh/id_rsa debug1: Offering public key: /home/users/foster/.ssh/id_dsa debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply debug3: Wrote 528 bytes for a total of 2021 debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password debug2: we did not send a packet, disable method debug3: authmethod_lookup password debug3: remaining preferred: ,password debug3: authmethod_is_enabled password debug1: Next authentication method: password foster@kerberos.monzell.com's password:如您所見，正在發送 gssapi-with-mic，但沒有可判定的響應。
事實證明，這似乎是被發送到 KDC：
debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: client->server aes128-ctr hmac-md5 none debug1: kex: server->client aes128-ctr hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST received debug1: SSH2_MSG_KEX_DH_GEX_GROUP sent debug1: expecting SSH2_MSG_KEX_DH_GEX_INIT debug1: SSH2_MSG_KEX_DH_GEX_REPLY sent debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: KEX done debug1: userauth-request for user foster service ssh-connection method none debug1: attempt 0 failures 0 debug1: PAM: initializing for "foster" debug1: PAM: setting PAM_RHOST to "192.168.15.37" debug1: PAM: setting PAM_TTY to "ssh" debug1: userauth-request for user foster service ssh-connection method gssapi-with-mic debug1: attempt 1 failures 0 debug1: Unspecified GSS failure. Minor code may provide more information **No key table entry found for host/localhost.localdomain@MONZELL.COM** debug1: userauth-request for user foster service ssh-connection method gssapi-with-mic debug1: attempt 2 failures 0 debug1: userauth-request for user foster service ssh-connection method gssapi-with-mic debug1: attempt 3 failures 0 debug1: userauth-request for user foster service ssh-connection method gssapi-with-mic debug1: attempt 4 failures 0 debug1: userauth-request for user foster service ssh-connection method publickey debug1: attempt 5 failures 0 debug1: test whether pkalg/pkblob are acceptable debug1: temporarily_use_uid: 502/502 (e=0/0) debug1: trying public key file /home/users/foster/.ssh/authorized_keys debug1: restore_uid: 0/0 debug1: temporarily_use_uid: 502/502 (e=0/0) debug1: trying public key file /home/users/foster/.ssh/authorized_keys2 debug1: restore_uid: 0/0一些研究表明這可能是主機文件的問題，我有如下問題：
[foster@sl6 ~]$ cat /etc/hosts 127.0.0.1 localhost.localdomain localhost ::1 sl6 localhost6.localdomain6 localhost6 192.168.15.100 kerberos.monzell.com kerberos 192.168.15.100 monzell.com 192.168.15.31 kvm0001.monzell.com kvm0001我試圖嘗試在主機上設置主機名手冊，但沒有任何效果。
以下是 KDC 的負責人名單：
[root@sl6 ~]# kadmin.local Authenticating as principal rilindo/admin@MONZELL.COM with password. kadmin.local: listprincs K/M@MONZELL.COM foster@MONZELL.COM host/kerberos.monzell.com@MONZELL.COM host/kvm0007.monzell.com@MONZELL.COM joe@MONZELL.COM kadmin/admin@MONZELL.COM kadmin/changepw@MONZELL.COM kadmin/sl6@MONZELL.COM krbtgt/MONZELL.COM@MONZELL.COM monzell@MONZELL.COM rilindo/admin@MONZELL.COM rilindo@MONZELL.COMKerberos 執行大部分身份驗證。使用者目錄位於 OpenLDAP 中。客戶端和伺服器都執行 Scientific Linux 6.1，客戶端作為虛擬機執行在伺服器之上。
我可以確認 Kerberos 在 OpenSSH 之外工作，如下所示：
[foster@kvm0007 ~]$ /usr/kerberos/bin/krsh -x -PN kerberos.monzell.com This rlogin session is encrypting all data transmissions. Last login: Sun Sep 25 21:18:20 from 192.168.15.37有問題的使用者具有以下 ssh 配置文件：
[foster@sl6 ~]$ cat .ssh/config GSSAPIAuthentication yes GSSAPIDelegateCredentials yes GSSAPITrustDns yes從這一點我應該往哪個方向走？
編輯：我知道我忘了在這篇文章中添加一些東西。這是伺服器上的 krb5.conf：
[root@sl6 ~]# cat /etc/krb5.conf [logging] default = FILE:/var/log/krb5libs.log kdc = FILE:/var/log/krb5kdc.log admin_server = FILE:/var/log/kadmind.log [libdefaults] default_realm = MONZELL.COM dns_lookup_realm = false dns_lookup_kdc = false ticket_lifetime = 24h renew_lifetime = 7d forwardable = true [realms] MONZELL.COM = { kdc = kerberos.monzell.com admin_server = kerberos.monzell.com } [domain_realm] .monzell.com = MONZELL.COM monzell.com = MONZELL.COM在客戶端：
[rilindo@kvm0007 ~]$ cat /etc/krb5.conf [logging] default = FILE:/var/log/krb5libs.log kdc = FILE:/var/log/krb5kdc.log admin_server = FILE:/var/log/kadmind.log [libdefaults] default_realm = MONZELL.COM dns_lookup_realm = false dns_lookup_kdc = false ticket_lifetime = 24h renew_lifetime = 7d forwardable = true [realms] EXAMPLE.COM = { kdc = kerberos.example.com admin_server = kerberos.example.com } MONZELL.COM = { kdc = kerberos.monzell.com admin_server = kerberos.monzell.com } [domain_realm] .example.com = EXAMPLE.COM example.com = EXAMPLE.COM monzell.com = MONZELL.COM .monzell.com = MONZELL.COM
可能是簡單的主機名問題或域領域映射問題。
（這可能是第一個，但為了完整起見，兩者都是。）
hostname -fkerberos.monzell.com 上的主機名問題應該返回：不
kerberos.monzell.com應該返回：
localhost.localdomain域領域映射問題
dig -t txt _kerberos.kerberos.monzell.com
dig -t txt _kerberos.monzell.com如果你不想使用
/etc/krb5.conf應該返回
<record> <ttl num> IN TXT "MONZELL.COM".但是，給定主機文件，情況可能並非如此。
/etc/krb5.conf應包含：$$ domain_realm $$
.monzell.com MONZELL.COM
或者
> > $$ domain_realm $$
> > kerberos.monzell.com MONZELL.COM >