Kerberized ssh only works on KDC

[Andrew Bovill]

I have set up MIT-kerberos on an old Sun Ultra10 I had lying around, and I
am attempting to get a sort of single sign-on working.



I got kerberized ssh logins working on the KDC itself, i.e. I run kinit,
ssh to the KDC and it works fine, here is what the KDC says when I
connect:

--KDC SSHD--
ultra10# sshd -dDp2222
debug1: sshd version OpenSSH_3.8.1p1  Debian-krb5 3.8.1p1-10
debug1: read PEM private key done: type RSA
debug1: private host key: #0 type 1 RSA
debug1: read PEM private key done: type DSA
debug1: private host key: #1 type 2 DSA
debug1: Bind to port 2222 on ::.
Server listening on :: port 2222.
debug1: Bind to port 2222 on 0.0.0.0.
debug1: Server will not fork when running in debugging mode.
Connection from ::ffff:192.168.183.2 port 42351
debug1: Client protocol version 2.0; client software version OpenSSH_4.3
debug1: match: OpenSSH_4.3 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.8.1p1 Debian-krb5 3.8.1p1-10
debug1: list_hostkey_types: ssh-rsa,ssh-dss
debug1: GSSAPI mechanism Kerberos (gss-group1-sha1-toWM5Slw5Ew8Mqkay+al2g==) supported
debug1: GSSAPI mechanism Kerberos (gss-group1-sha1-Se3H81ismmOC3OE+FwYCiQ==) supported
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: kex: server->client aes128-cbc 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 andy service ssh-connection method none
debug1: attempt 0 failures 0
debug1: PAM: initializing for "andy"
debug1: PAM: setting PAM_RHOST to "bloo.eeble.net"
debug1: PAM: setting PAM_TTY to "ssh"
Failed none for andy from ::ffff:192.168.183.2 port 42351 ssh2
debug1: userauth-request for user andy service ssh-connection method gssapi-with-mic
debug1: attempt 1 failures 1
Postponed gssapi-with-mic for andy from ::ffff:192.168.183.2 port 42351 ssh2
debug1: Got no client credentials
Authorized to andy, krb5 principal andy at EEBLE.NET (krb5_kuserok)
Accepted gssapi-with-mic for andy from ::ffff:192.168.183.2 port 42351 ssh2
debug1: Entering interactive session for SSH2.
debug1: server_init_dispatch_20
debug1: server_input_channel_open: ctype session rchan 0 win 65536 max 16384
debug1: input_session_request
debug1: channel 0: new [server-session]
debug1: session_new: init
debug1: session_new: session 0
debug1: session_open: channel 0
debug1: session_open: session 0: link with channel 0
debug1: server_input_channel_open: confirm session
debug1: server_input_channel_req: channel 0 request x11-req reply 0
debug1: session_by_channel: session 0 channel 0
debug1: session_input_channel_req: session 0 req x11-req
debug1: X11 forwarding disabled in server configuration file.
debug1: server_input_channel_req: channel 0 request pty-req reply 0
debug1: session_by_channel: session 0 channel 0
debug1: session_input_channel_req: session 0 req pty-req
debug1: Allocating pty.
debug1: session_pty_req: session 0 alloc /dev/pts/1
debug1: server_input_channel_req: channel 0 request shell reply 0
debug1: session_by_channel: session 0 channel 0
debug1: session_input_channel_req: session 0 req shell
debug1: temporarily_use_uid: 1000/1000 (e=0/0)
debug1: No credentials stored
debug1: restore_uid: 0/0
debug1: PAM: setting PAM_TTY to "/dev/pts/1"
debug1: PAM: establishing credentials
debug1: Setting controlling tty using TIOCSCTTY.


what I notice especially are these lines:
debug1: GSSAPI mechanism Kerberos (gss-group1-sha1-toWM5Slw5Ew8Mqkay+al2g==) supported
debug1: GSSAPI mechanism Kerberos (gss-group1-sha1-Se3H81ismmOC3OE+FwYCiQ==) supported

so, that works fine, but when I go to connect to other machines on the
network, that are NOT KDCs, (but can use kinit just fine), I get the
following log from sshd:

--nonKDC sshd--
noodles:~# sshd -dD -p2222
debug1: sshd version OpenSSH_3.8.1p1  Debian-krb5 3.8.1p1-10
debug1: read PEM private key done: type RSA
debug1: private host key: #0 type 1 RSA
debug1: read PEM private key done: type DSA
debug1: private host key: #1 type 2 DSA
debug1: Bind to port 2222 on 0.0.0.0.
Server listening on 0.0.0.0 port 2222.
socket: Address family not supported by protocol
debug1: Server will not fork when running in debugging mode.
Connection from 192.168.183.2 port 35952
debug1: Client protocol version 2.0; client software version OpenSSH_4.3
debug1: match: OpenSSH_4.3 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.8.1p1  Debian-krb5 3.8.1p1-10
debug1: list_hostkey_types: ssh-rsa,ssh-dss
debug1: Miscellaneous failure
No such file or directory

debug1: no credentials for GSSAPI mechanism Kerberos
debug1: Miscellaneous failure
No such file or directory

debug1: no credentials for GSSAPI mechanism Kerberos
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: kex: server->client aes128-cbc 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 andy service ssh-connection method none
debug1: attempt 0 failures 0
debug1: PAM: initializing for "andy"
debug1: PAM: setting PAM_RHOST to "bloo.eeble.net"
debug1: PAM: setting PAM_TTY to "ssh"
Failed none for andy from 192.168.183.2 port 35952 ssh2
debug1: userauth-request for user andy service ssh-connection method gssapi-with-mic
debug1: attempt 1 failures 1
debug1: Miscellaneous failure
No such file or directory

Failed gssapi-with-mic for andy from 192.168.183.2 port 35952 ssh2
debug1: userauth-request for user andy service ssh-connection method gssapi-with-mic
debug1: attempt 2 failures 1
Failed gssapi-with-mic for andy from 192.168.183.2 port 35952 ssh2
debug1: userauth-request for user andy service ssh-connection method publickey
debug1: attempt 3 failures 1
debug1: test whether pkalg/pkblob are acceptable
debug1: temporarily_use_uid: 1000/1000 (e=0/0)
debug1: trying public key file /home/andy/.ssh/authorized_keys
debug1: matching key found: file /home/andy/.ssh/authorized_keys, line 1
Found matching DSA key: e5:30:ac:82:e3:3e:56:aa:0a:5f:63:0e:66:9c:ae:59
debug1: restore_uid: 0/0
Postponed publickey for andy from 192.168.183.2 port 35952 ssh2


the lines I'm seeing here that concern me are:
debug1: Miscellaneous failure
No such file or directory

debug1: no credentials for GSSAPI mechanism Kerberos
debug1: Miscellaneous failure
No such file or directory

debug1: no credentials for GSSAPI mechanism Kerberos

I have searched many places for information on why this is occuring but
with no success.

(All systems are running debian sarge stable/testing) Any help is greatly
appreciated!
--Andrew