i am using RHEL 4 .i had done some changes /shawdow file for kerbros authentication but now unable to login as any nonprivelage user.
My /etc/shawdow:
root:$1$Q1Ge3Ixm$wpN0E9TN/I95gePVHdPn71:13347:0:99999:7:::
bin:*:13344:0:99999:7:::
daemon:*:13344:0:99999:7:::
adm:*:13344:0:99999:7:::
lp:*:13344:0:99999:7:::
sync:*:13344:0:99999:7:::
shutdown:*:13344:0:99999:7:::
halt:*:13344:0:99999:7:::
mail:*:13344:0:99999:7:::
news:*:13344:0:99999:7:::
uucp:*:13344:0:99999:7:::
operator:*:13344:0:99999:7:::
games:*:13344:0:99999:7:::
gopher:*:13344:0:99999:7:::
ftp:*:13344:0:99999:7:::
nobody:*:13344:0:99999:7:::
dbus:!!:13344:0:99999:7:::
vcsa:!!:13344:0:99999:7:::
nscd:!!:13344:0:99999:7:::
rpm:!!:13344:0:99999:7:::
haldaemon:!!:13344:0:99999:7:::
netdump:!!:13344:0:99999:7:::
ident:!!:13344:0:99999:7:::
sshd:!!:13344:0:99999:7:::
rpc:!!:13344:0:99999:7:::
rpcuser:!!:13344:0:99999:7:::
nfsnobody:!!:13344:0:99999:7:::
mailnull:!!:13344:0:99999:7:::
smmsp:!!:13344:0:99999:7:::
pcap:!!:13344:0:99999:7:::
apache:!!:13344:0:99999:7:::
squid:!!:13344:0:99999:7:::
webalizer:!!:13344:0:99999:7:::
xfs:!!:13344:0:99999:7:::
ntp:!!:13344:0:99999:7:::
gdm:!!:13344:0:99999:7:::
htt:!!:13344:0:99999:7:::
pvm:!!:13344:0:99999:7:::
canna:!!:13344:0:99999:7:::
wnn:!!:13344:0:99999:7:::
quagga:!!:13344:0:99999:7:::
cyrus:!!:13344:0:99999:7:::
dovecot:!!:13344:0:99999:7:::
postfix:!!:13344:0:99999:7:::
mailman:!!:13344:0:99999:7:::
mysql:!!:13344:0:99999:7:::
postgres:$1$mYS4p0/G$7H9vmkr72yUig8zguawQi/:13344:0:99999:7:::
amanda:!!:13344:0:99999:7:::
fax:!!:13344:0:99999:7:::
named:!!:13344:0:99999:7:::
exim:!!:13344:0:99999:7:::
ldap:!!:13344:0:99999:7:::
radiusd:!!:13344:0:99999:7:::
radvd:!!:13344:0:99999:7:::
abhi_raj:$1$QpnDn6Ub$W8yATf4.Rx0ljnM5wLYNo1:13344:0:99999:7:::
student:$1$mnoKrC20$/MZvu9nepeB.fHYKVrVZe/:13344:0:99999:7:::
azure:$1$MWWo11.Q$laj/tQ6J24Z9d8YBzNhNJ/:13344:0:99999:7:::
shiv:$1$87D7hy2.$nBrtHzUC2K1W6SIG90ViW.:13347:0:99999:7:::




log error is following
Jul 18 18:17:22 abhi login(pam_unix)[10953]: authentication failure; logname=LOGIN uid=0 euid=0 tty=tty1 ruser= rhost= user=abhi_raj
Jul 18 18:17:44 abhi login[10953]: pam_krb5[10953]: authentication fails for 'abhi_raj' (abhi_raj@KIIT.COM): Authentication service cannot retrieve authentication info. (Cannot contact any KDC for requested realm)
Jul 18 18:17:47 abhi login[10953]: FAILED LOGIN 1 FROM (null) FOR abhi_raj, Authentication failure
Jul 18 18:17:52 abhi login(pam_unix)[7318]: authentication failure; logname=LOGIN uid=0 euid=0 tty=tty2 ruser= rhost= user=abhi_raj
Jul 18 18:18:14 abhi login[7318]: pam_krb5[7318]: authentication fails for 'abhi_raj' (abhi_raj@KIIT.COM): Authentication service cannot retrieve authentication info. (Cannot contact any KDC for requested realm)
Jul 18 18:18:16 abhi login[7318]: FAILED LOGIN 1 FROM (null) FOR abhi_raj, Authentication failure
Jul 18 18:18:18 abhi init: open(/dev/pts/0): No such file or directory
Jul 18 18:18:44 abhi passwd(pam_unix)[11394]: password changed for shiv
Jul 18 18:18:49 abhi init: open(/dev/pts/0): No such file or directory








plz help me way out???????????????????

i would wonder if your /etc/nsswitch.conf file has been changed to only allow krb5 access via login? what does that file say for the passwd and shadow entries? if it doesn't like "files" as an option, add it.