"Shared secret is incorrect" - but it is identical!
I'm trying to get FreeRadius working on a Fedora Core 6 server
with a view to eventually using it to authenticate against
Windows Active Directory via ntlm_auth for the Janet Roaming
Service. The first attempts at configuring it failed rather
drastically so I went back to the beginning and I'm doing things
one step at at time, making one-line changes to configs then
using radtest and/or radclient to ensure it still works. I can
now authenticate a users defined in users file, or in the Unix
passwd file, from radtest on local machine. (i.e. the same one
the server is running on). Next step is to check that I can use
FreeRadius over the network by trying radclient on another machine.
It doesn't work from the networked machine. I see the "invalid
signature (err=2)! (Shared secret is incorrect.)" message.
Debug log says to "double check the shared secret on the
server". I have more than double checked it. I'm using the same
shared secret on both machines. I "know" the shared secret is
correct because it works from the local machine. But obviously
it isn't! Because the encrypted password can't be read on the
server. What can I do to make sure the shared secret truly is
correct?
The definitions for both hosts are identical in the clients.conf
file. At one point I manually edited them to swap the names of
servers while leaving the secrets the same, just in case there
was some hidden unprintable character - but the new local one
still worked, proving that the two entries in the clients.conf
file are in fact identical.
The shared secrets used in the radtest command are identical.
I'm cutting and pasting the *same* radtest command in, not
retyping it.
To test for sure I put radclient commands in scripts on the
remote machine, where they failed. Then I ftped them from the
machine they failed on to the other one - where they worked! So
it *has* to be the same! And if I alter it in any way there
then radtest fails so its not getting a free passage just
because its local.
I have a horrid fear I've missed something totally obvious about
how radclient works and that I'm doing something really really
stupid stupid - but I can't see what. And I've been stuck here
for over a week now. Any clues?
From the local machine I get:
===================
[ken@monstera ~]$ /usr/local/bin/radtest -d /etc/raddb
username@bbk.ac.uk password server.IP.addr 122 sharedsecret
Sending Access-Request of id 121 to server.IP.addr port 1812
User-Name = "username@bbk.ac.uk"
User-Password = "password"
NAS-IP-Address = 255.255.255.255
NAS-Port = 122
rad_recv: Access-Accept packet from host server.IP.addr:1812,
id=121, length=20
===================
But when I try from the remote machine I get:
===================
/usr/local/bin/radtest -d /etc/raddb username@bbk.ac.uk
password server.IP.addr 122 sharedsecret
Sending Access-Request of id 184 to server.IP.addr port 1812
User-Name = "username@bbk.ac.uk"
User-Password = "password"
NAS-IP-Address = 255.255.255.255
NAS-Port = 122
rad_recv: Access-Reject packet from host server.IP.addr:1812,
id=184, length=20
rad_verify: Received Access-Reject packet from client
server.IP.addr port 1812 with invalid signature (err=2)!
(Shared secret is incorrect.)
[ken@ficus ~]$ /usr/local/bin/radtest -d /etc/raddb
username@bbk.ac.uk password server.IP.addr 122 sharedsecret
Sending Access-Request of id 246 to server.IP.addr port 1812
User-Name = "username@bbk.ac.uk"
User-Password = "password"
NAS-IP-Address = 255.255.255.255
NAS-Port = 122
rad_recv: Access-Reject packet from host server.IP.addr:1812,
id=246, length=20
rad_verify: Received Access-Reject packet from client
server.IP.addr port 1812 with invalid signature (err=2)!
(Shared secret is incorrect.)
[ken@ficus ~]$ /usr/local/bin/radtest -d /etc/raddb
username@bbk.ac.uk password server.IP.addr 122 sharedsecret
Sending Access-Request of id 7 to server.IP.addr port 1812
User-Name = "username@bbk.ac.uk"
User-Password = "password"
NAS-IP-Address = 255.255.255.255
NAS-Port = 122
rad_recv: Access-Reject packet from host server.IP.addr:1812,
id=7, length=20
rad_verify: Received Access-Reject packet from client
server.IP.addr port 1812 with invalid signature (err=2)!
(Shared secret is incorrect.)
==================
I strongly suspect that I am doing something stupid on the
client side, because the same request works from the local
server. But just in case its relevant, on the server in debug
mode the failed transaction looks like this:
==================
rad_recv: Access-Request packet from host client.IP.addr:32772,
id=61, length=68
User-Name = "username@bbk.ac.uk"
User-Password =
"V\303\245\321\364Fb\334\373\275\242\203\\o6\264"
NAS-IP-Address = 255.255.255.255
NAS-Port = 122
Processing the authorize section of radiusd.conf
modcall: entering group authorize for request 9
modcall[authorize]: module "preprocess" returns ok for request 9
radius_xlat:
'/var/log/radius/radacct/client.IP.addr/auth-detail-20070703'
rlm_detail:
/var/log/radius/radacct/%{Client-IP-Address}/auth-detail-%Y%m%d
expands to
/var/log/radius/radacct/client.IP.addr/auth-detail-20070703
modcall[authorize]: module "auth_log" returns ok for request 9
modcall[authorize]: module "chap" returns noop for request 9
modcall[authorize]: module "mschap" returns noop for request 9
rlm_realm: Looking up realm "bbk.ac.uk" for User-Name =
"username@bbk.ac.uk"
rlm_realm: Found realm "bbk.ac.uk"
rlm_realm: Adding Stripped-User-Name = "username"
rlm_realm: Proxying request from user username to realm
bbk.ac.uk
rlm_realm: Adding Realm = "bbk.ac.uk"
rlm_realm: Authentication realm is LOCAL.
modcall[authorize]: module "suffix" returns noop for request 9
rlm_eap: No EAP-Message, not doing EAP
modcall[authorize]: module "eap" returns noop for request 9
users: Matched entry DEFAULT at line 20
modcall[authorize]: module "files" returns ok for request 9
rlm_pap: WARNING! No "known good" password found for the user.
Authentication may fail because of this.
modcall[authorize]: module "pap" returns noop for request 9
modcall: leaving group authorize (returns ok) for request 9
rad_check_password: Found Auth-Type System
auth: type "System"
Processing the authenticate section of radiusd.conf
modcall: entering group authenticate for request 9
modcall[authenticate]: module "unix" returns notfound for
request 9
modcall: leaving group authenticate (returns notfound) for request 9
auth: Failed to validate the user.
WARNING: Unprintable characters in the password. ?
Double-check the shared secret on the server and the NAS!
Delaying request 9 for 1 seconds
Finished request 9
Going to the next request
--- Walking the entire request list ---
Waking up in 1 seconds...
--- Walking the entire request list ---
Waking up in 1 seconds...
--- Walking the entire request list ---
Sending Access-Reject of id 61 to client.IP.addr port 32772
Waking up in 4 seconds...
--- Walking the entire request list ---
Cleaning up request 9 ID 61 with timestamp 468aaada
Nothing to do. Sleeping until we see a request.
==================
And a successful one looks like this - the obvious difference is
that the password is in clear (though I have obfuscated it
here) - as would be expected if there was no shared secret.
==================
rad_recv: Access-Request packet from host server.IP.addr:32770,
id=170, length=46
User-Name = "username"
User-Password = "password"
Processing the authorize section of radiusd.conf
modcall: entering group authorize for request 10
modcall[authorize]: module "preprocess" returns ok for request 10
radius_xlat:
'/var/log/radius/radacct/server.IP.addr/auth-detail-20070703'
rlm_detail:
/var/log/radius/radacct/%{Client-IP-Address}/auth-detail-%Y%m%d
expands to
/var/log/radius/radacct/server.IP.addr/auth-detail-20070703
modcall[authorize]: module "auth_log" returns ok for request 10
modcall[authorize]: module "chap" returns noop for request 10
modcall[authorize]: module "mschap" returns noop for request 10
rlm_realm: No '@' in User-Name = "username", looking up
realm NULL
rlm_realm: Found realm "NULL"
rlm_realm: Adding Stripped-User-Name = "username"
rlm_realm: Proxying request from user username to realm NULL
rlm_realm: Adding Realm = "NULL"
rlm_realm: Authentication realm is LOCAL.
modcall[authorize]: module "suffix" returns noop for request 10
rlm_eap: No EAP-Message, not doing EAP
modcall[authorize]: module "eap" returns noop for request 10
users: Matched entry username at line 2
modcall[authorize]: module "files" returns ok for request 10
rlm_pap: Found existing Auth-Type, not changing it.
modcall[authorize]: module "pap" returns noop for request 10
modcall: leaving group authorize (returns ok) for request 10
rad_check_password: Found Auth-Type Local
auth: type Local
auth: user supplied User-Password matches local User-Password
Processing the post-auth section of radiusd.conf
modcall: entering group post-auth for request 10
radius_xlat:
'/var/log/radius/radacct/server.IP.addr/reply-detail-20070703'
rlm_detail:
/var/log/radius/radacct/%{Client-IP-Address}/reply-detail-%Y%m%d
expands to
/var/log/radius/radacct/server.IP.addr/reply-detail-20070703
modcall[post-auth]: module "reply_log" returns ok for request 10
modcall: leaving group post-auth (returns ok) for request 10
Sending Access-Accept of id 170 to server.IP.addr port 32770
Finished request 10
Going to the next request
--- Walking the entire request list ---
Waking up in 6 seconds...
--- Walking the entire request list ---
Cleaning up request 10 ID 170 with timestamp 468aab69
Nothing to do. Sleeping until we see a
==================
Debug of startup looks like this (same in both cases obviously).
I made new conf files to contain any local changes I might make
& to yhelp me find my way aroudn radiusd.conf more easily - but
they are just the sections of conf I might want to change pulled
out and INCLUDEd back in so no substantial change:
==================
/usr/local/sbin/radiusd -X -d /etc/raddb
Starting - reading configuration files ...
reread_config: reading radiusd.conf
Config: including file: /etc/raddb/bbk_fr_listen.conf
Config: including file: /etc/raddb/bbk_fr_security.conf
Config: including file: /etc/raddb/proxy.conf
Config: including file: /etc/raddb/clients.conf
Config: including file: /etc/raddb/snmp.conf
Config: including file: /etc/raddb/eap.conf
Config: including file: /etc/raddb/bbk_fr_mschap.conf
Config: including file: /etc/raddb/bbk_fr_ldap.conf
Config: including file: /etc/raddb/bbk_fr_passwd.conf
Config: including file: /etc/raddb/bbk_fr_realms.conf
Config: including file: /etc/raddb/bbk_fr_details.conf
Config: including file: /etc/raddb/sql.conf
Config: including file: /etc/raddb/bbk_fr_radutmp.conf
Config: including file: /etc/raddb/bbk_fr_counters.conf
Config: including file: /etc/raddb/bbk_fr_exec.conf
Config: including file: /etc/raddb/bbk_fr_ippool.conf
main: prefix = "/usr/local"
main: localstatedir = "/var"
main: logdir = "/var/log/radius"
main: libdir = "/usr/local/lib"
main: radacctdir = "/var/log/radius/radacct"
main: hostname_lookups = no
main: max_request_time = 30
main: cleanup_delay = 5
main: max_requests = 1024
main: delete_blocked_requests = 0
main: port = 0
main: allow_core_dumps = no
main: log_stripped_names = no
main: log_file = "/var/log/radius/radius.log"
main: log_auth = no
main: log_auth_badpass = no
main: log_auth_goodpass = no
main: pidfile = "/var/run/radiusd/radiusd.pid"
main: user = "(null)"
main: group = "(null)"
main: usercollide = no
main: lower_user = "no"
main: lower_pass = "no"
main: nospace_user = "no"
main: nospace_pass = "no"
main: checkrad = "/usr/local/sbin/checkrad"
main: proxy_requests = yes
proxy: retry_delay = 5
proxy: retry_count = 3
proxy: synchronous = no
proxy: default_fallback = yes
proxy: dead_time = 120
proxy: post_proxy_authorize = no
proxy: wake_all_if_all_dead = no
security: max_attributes = 200
security: reject_delay = 1
security: status_server = yes
main: debug_level = 0
read_config_files: reading dictionary
read_config_files: reading naslist
Using deprecated naslist file. Support for this will go away soon.
read_config_files: reading clients
read_config_files: reading realms
radiusd: entering modules setup
Module: Library search path is /usr/local/lib
Module: Loaded exec
exec: wait = yes
exec: program = "(null)"
exec: input_pairs = "request"
exec: output_pairs = "(null)"
exec: packet_type = "(null)"
rlm_exec: Wait=yes but no output defined. Did you mean output=none?
Module: Instantiated exec (exec)
Module: Loaded expr
Module: Instantiated expr (expr)
Module: Loaded PAP
pap: encryption_scheme = "crypt"
pap: auto_header = yes
Module: Instantiated pap (pap)
Module: Loaded CHAP
Module: Instantiated chap (chap)
Module: Loaded MS-CHAP
mschap: use_mppe = yes
mschap: require_encryption = yes
mschap: require_strong = yes
mschap: with_ntdomain_hack = yes
mschap: passwd = "(null)"
mschap: ntlm_auth = "/usr/bin/ntlm_auth --request-nt-key
--username=%{Stripped-User-Name:-%{User-Name:-None}}
--challenge=%{mschap:Challenge:-00}
--nt-response=%{mschap:NT-Response:-00}"
Module: Instantiated mschap (mschap)
Module: Loaded System
unix: cache = no
unix: passwd = "(null)"
unix: shadow = "(null)"
unix: group = "(null)"
unix: radwtmp = "/var/log/radius/radwtmp"
unix: usegroup = no
unix: cache_reload = 600
Module: Instantiated unix (unix)
Module: Loaded eap
eap: default_eap_type = "peap"
eap: timer_expire = 60
eap: ignore_unknown_eap_types = no
eap: cisco_accounting_username_bug = no
rlm_eap: Loaded and initialized type md5
rlm_eap: Loaded and initialized type leap
gtc: challenge = "Password: "
gtc: auth_type = "PAP"
rlm_eap: Loaded and initialized type gtc
tls: rsa_key_exchange = no
tls: dh_key_exchange = yes
tls: rsa_key_length = 512
tls: dh_key_length = 512
tls: verify_depth = 0
tls: CA_path = "(null)"
tls: pem_file_type = yes
tls: private_key_file = "/etc/raddb/certs/radius2.bbk.ac.uk.key"
tls: certificate_file = "/etc/raddb/certs/radius2.bbk.ac.uk.pem"
tls: CA_file = "/etc/raddb/certs/ct_root.pem"
tls: private_key_password = "whatever"
tls: dh_file = "/etc/raddb/certs/dh"
tls: random_file = "/dev/urandom"
tls: fragment_size = 1024
tls: include_length = yes
tls: check_crl = no
tls: check_cert_cn = "(null)"
tls: cipher_list = "(null)"
tls: check_cert_issuer = "(null)"
rlm_eap_tls: Loading the certificate file as a chain
rlm_eap: Loaded and initialized type tls
peap: default_eap_type = "mschapv2"
peap: copy_request_to_tunnel = no
peap: use_tunneled_reply = no
peap: proxy_tunneled_request_as_eap = yes
rlm_eap: Loaded and initialized type peap
mschapv2: with_ntdomain_hack = no
rlm_eap: Loaded and initialized type mschapv2
Module: Instantiated eap (eap)
Module: Loaded preprocess
preprocess: huntgroups = "/etc/raddb/huntgroups"
preprocess: hints = "/etc/raddb/hints"
preprocess: with_ascend_hack = no
preprocess: ascend_channels_per_line = 23
preprocess: with_ntdomain_hack = no
preprocess: with_specialix_jetstream_hack = no
preprocess: with_cisco_vsa_hack = no
preprocess: with_alvarion_vsa_hack = no
Module: Instantiated preprocess (preprocess)
Module: Loaded detail
detail: detailfile =
"/var/log/radius/radacct/%{Client-IP-Address}/auth-detail-%Y%m%d"
detail: detailperm = 384
detail: dirperm = 493
detail: locking = no
Module: Instantiated detail (auth_log)
Module: Loaded realm
realm: format = "suffix"
realm: delimiter = "@"
realm: ignore_default = no
realm: ignore_null = no
Module: Instantiated realm (suffix)
Module: Loaded files
files: usersfile = "/etc/raddb/users"
files: acctusersfile = "/etc/raddb/acct_users"
files: preproxy_usersfile = "/etc/raddb/preproxy_users"
files: compat = "no"
Module: Instantiated files (files)
Module: Loaded Acct-Unique-Session-Id
acct_unique: key = "User-Name, Acct-Session-Id,
NAS-IP-Address, Client-IP-Address, NAS-Port"
Module: Instantiated acct_unique (acct_unique)
detail: detailfile =
"/var/log/radius/radacct/%{Client-IP-Address}/detail-%Y%m%d"
detail: detailperm = 384
detail: dirperm = 493
detail: locking = no
Module: Instantiated detail (detail)
Module: Loaded radutmp
radutmp: filename = "/var/log/radius/radutmp"
radutmp: username = "%{User-Name}"
radutmp: case_sensitive = yes
radutmp: check_with_nas = yes
radutmp: perm = 384
radutmp: callerid = yes
Module: Instantiated radutmp (radutmp)
detail: detailfile =
"/var/log/radius/radacct/%{Client-IP-Address}/pre-proxy-detail-%Y%m%d"
detail: detailperm = 384
detail: dirperm = 493
detail: locking = no
Module: Instantiated detail (pre_proxy_log)
detail: detailfile =
"/var/log/radius/radacct/%{Client-IP-Address}/post-proxy-detail-%Y%m%d"
detail: detailperm = 384
detail: dirperm = 493
detail: locking = no
Module: Instantiated detail (post_proxy_log)
detail: detailfile =
"/var/log/radius/radacct/%{Client-IP-Address}/reply-detail-%Y%m%d"
detail: detailperm = 384
detail: dirperm = 493
detail: locking = no
Module: Instantiated detail (reply_log)
Listening on authentication *:1812
Listening on accounting *:1813
Listening on proxy *:1814
Ready to process requests.
==================
FreeRADIUS Version 1.1.5, for host i686-pc-linux-gnu, built on
Mar 9 2007 at 15:07:40
The configurations are minimal:
relevant entries in clients file:
==================
client nnn.nnn.nnn.nnn {
secret = sharedsecret
shortname = monstera
nastype = other
}
client nnn.nnn.nnn.nnn {
secret = sharedsecret
shortname = ficus
nastype = other
}
==================
relevant entry in users file
==================
username Auth-Type := Local, User-Password == "password"
==================
As I said, authentication works for the host on which Freeradius
is running, but not on the other.
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