It looks like a configuration error. Also I recall Heimdal had some issues
with Cross realms. But you say all clients are on Windows only the server
uses squid with Heindal, so the problem might be on the Windows side. Do the
three AD domains trust each other ?
Markus
"Fabian Hugelshofer" <fh@xxxxxxx> wrote in message
news:4B8FDB2E.5000407@xxxxxxxxxx
Markus Moeller wrote:
Continuation needed means that the GSSAPI exchange has not finished and
the server needs more data from the client. Can you see in wireshark if
the token length is the one squid_kerb_auth says it is
> squid_kerb_auth: Got 'YRYI...' from squid (length: 3607)
I could confirm that the data that the client sends in the HTTP request is
the same that is received by squid_kerb_auth. "YR " is added by squid (the
space in the log of my last post got lost).
Further, I discovered that authentication is working for users from
certain domains, but not for those at whose location the proxy is standing
at. I describe the AD domain setup in more details:
The computer account that is associated with the service principal in the
keytab file is from domain A.EXAMPLE.COM. Users, for who access is not
working, are from domain B1.B.EXAMPLE.COM. Access is working for users
from C.EXAMPLE.COM and a few others. The users from these "other" domains
have been tested by starting IE as a user from that domain on a computer
in domain C.EXAMPLE.COM. I forgot to mention that all the clients are
Windows XP with IE7.
The FQDN of the proxy is not in the Windows domain hierarchy. It is
proxy.d1.d.example.com.
I compiled squid_kerb_auth_test from Squid 3.1. On the proxy:
## With a user from non-working domain B1.B.EXAMPLE.COM
# kinit user1@xxxxxxxxxxxxxxxx
user1@xxxxxxxxxxxxxxxx's Password:
# squid_kerb_auth_test proxy.d1.d.example.com
2010/03/04 15:26:51| squid_kerb_auth_test: gss_init_sec_context() failed:
An unsupported mechanism was requested. unknown mech-code 0 for mech
unknown
Token: NULL
# kinit -S HTTP/proxy.d1.d.example.com@xxxxxxxxxxxxx
user1@xxxxxxxxxxxxxxxx's Password:
kinit: krb5_get_init_creds: Server
(HTTP/proxy.d1.d.example.com@xxxxxxxxxxxxxxxx) unknown
## With a user from the domain of the proxy (A.EXAMPLE.COM)
# kinit user2@xxxxxxxxxxxxx
user2@xxxxxxxxxxxxx's Password:
# squid_kerb_auth_test proxy.d1.d.example.com
Token: YIIF...
# kinit -S HTTP/proxy.d1.d.example.com@xxxxxxxxxxxxx
user2@xxxxxxxxxxxxx's Password:
Tomorrow I will try with a user from another domain that is working and
that is outside A.EXAMPLE.COM. The content of my krb5.conf is:
[libdefaults]
default_realm = A.EXAMPLE.COM
[realms]
A.EXAMPLE.COM = {
kdc = 10.0.0.1
kdc = 10.0.0.2
}
B1.b.EXAMPLE.COM = {
kdc = 10.1.0.1
kdc = 10.1.0.2
}
[domain_realm]
.example.com = A.EXAMPLE.COM
example.com = A.EXAMPLE.COM
.d1.d.example.com = A.EXAMPLE.COM
d1.d.example.com = A.EXAMPLE.COM
Fabian
