Hi all,
I just upgraded one of my servers and I'm having a bit of trouble
getting some of the kerberos authentication bits working.
Specifically, any Kerberos instance run out of a v5srvtab doesn't work
so well. Using stashed tickets or normal principals worked fine.
Gritty details follow.
Peter
Here are details from the specific v5srvtab's...
[root@sensei postgres]# klist -k -t /etc/v5srvtab.wsbackup
Keytab name: FILE:/etc/v5srvtab.wsbackup
KVNO Timestamp Principal
---- ----------------- --------------------------------------------------------
13 12/20/07 15:56:11 wsbackup/sensei.cs.wisc.edu@CS.WISC.EDU
[root@sensei postgres]# klist -k -t /etc/v5srvtab
Keytab name: FILE:/etc/v5srvtab
KVNO Timestamp Principal
---- ----------------- --------------------------------------------------------
13 12/20/07 15:56:11 host/sensei.cs.wisc.edu@CS.WISC.EDU
13 12/20/07 15:56:11 rcmd/sensei.cs.wisc.edu@CS.WISC.EDU
13 12/20/07 15:56:11 telnet/sensei.cs.wisc.edu@CS.WISC.EDU
13 12/20/07 15:56:11 ftp/sensei.cs.wisc.edu@CS.WISC.EDU
13 12/20/07 15:56:11 pop/sensei.cs.wisc.edu@CS.WISC.EDU
13 12/20/07 15:56:11 wsbackup/sensei.cs.wisc.edu@CS.WISC.EDU
12 12/20/07 15:56:11 auth/sensei.cs.wisc.edu@CS.WISC.EDU
8 12/20/07 15:56:11 postgres/sensei.cs.wisc.edu@CS.WISC.EDU
Here's the error from the syslog...
Apr 17 11:18:39 sensei postgres[4486]: [3-1] LOG: connection
received: host=mitchell.cs.wisc.edu port=56925
Apr 17 11:18:39 sensei postgres[4486]: [4-1] LOG: unexpected Kerberos
user name received from client (received "wsbackup", expected
"wsbackup/mitchell.cs.wisc.edu")
Apr 17 11:18:39 sensei postgres[4486]: [5-1] FATAL: Kerberos 5
authentication failed for user "wsbackup"
Apr 17 11:18:39 sensei postgres[4488]: [3-1] LOG: connection
received: host=mitchell.cs.wisc.edu port=56926
Apr 17 11:18:39 sensei postgres[4488]: [4-1] FATAL: no pg_hba.conf
entry for host "128.105.207.19", user "wsbackup", database "sushi",
SSL off
Here's the relevant bit from my pg_hba.conf. For compatibility, I'm
using krb5 instead of gss until everything is upgraded from 8.2. If
using gss authentication will work, please let me know.
hostssl all all 128.105.0.0/16 krb5
hostssl all all 198.133.224.0/24 krb5
And from postgresql.conf...
# - Security & Authentication -
#authentication_timeout = 1min # 1s-600s
ssl = on # (change requires restart)
#ssl_ciphers = 'ALL:!ADH:!LOW:!EXP:!MD5:@STRENGTH' # Allowed SSL ciphers
# (change requires restart)
#password_encryption = on
krb_realm = 'CS.WISC.EDU'
#db_user_namespace = off
# Kerberos and GSSAPI
krb_server_keyfile = '/etc/v5srvtab.postgres' # (change requires restart)
#krb_srvname = 'postgres' # (change requires restart, kerberos onl
y)
#krb_server_hostname = '' # empty string matches any keytab entry
# (change requires restart, kerberos onl
y)
#krb_caseins_users = off # (change requires restart)
--
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