I really didn't want to post here, but I just can't make any headway with my radius implementation. I am very new at this and still quite confused on how the various config files function and interact with each other. So, I'm not surprised that my implementation is only sort of working. I have installed freeradius 2.1.8 on Ubuntu Server 8.04 by making deb packages from the source and installing the deb packages. Radius is relying on an LDAP server for authentication of wireless clients. Only clients with valid usernames and passwords in LDAP will get authenticated. What I would really like to do (other than actually be able to understand the concepts behind the config files) is require clients to be in a particular LDAP group (e.g., wireless-users) in order to successfully authenticate. I don't understand how to make that happen. I've tried creating group filters like this in "modules/ldap": groupname_attribute = cn groupmembership_filter = "(&(objectClass=posixGroup)(memberUid=%{Stripped-User-Name:-%{User-Name}}))" groupmembership_attribute = memberUid and this in "users": DEFAULT LDAP-GROUP == vpn-users Service-Type = Administrative-User But the output seems to indicate that it is not even considering my radiusd.conf config when it comes to the filter. (see output below). I would so welcome assistance with this. In addition, is there any resource that is particularly good at explaining how radius and its config files really works? Thanks. John # freeradius -X FreeRADIUS Version 2.1.8, for host i486-pc-linux-gnu, built on May 14 2010 at 09:29:10 Copyright (C) 1999-2009 The FreeRADIUS server project and contributors. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. You may redistribute copies of FreeRADIUS under the terms of the GNU General Public License v2. Starting - reading configuration files ... including configuration file /etc/freeradius/radiusd.conf including configuration file /etc/freeradius/proxy.conf including configuration file /etc/freeradius/clients.conf including files in directory /etc/freeradius/modules/ including configuration file /etc/freeradius/modules/unix including configuration file /etc/freeradius/modules/detail including configuration file /etc/freeradius/modules/ldap.dpkg-old including configuration file /etc/freeradius/modules/ntlm_auth including configuration file /etc/freeradius/modules/sql_log including configuration file /etc/freeradius/modules/sradutmp including configuration file /etc/freeradius/modules/attr_filter including configuration file /etc/freeradius/modules/realm including configuration file /etc/freeradius/modules/echo including configuration file /etc/freeradius/modules/pap including configuration file /etc/freeradius/modules/radutmp including configuration file /etc/freeradius/modules/ldap including configuration file /etc/freeradius/modules/ippool including configuration file /etc/freeradius/modules/files including configuration file /etc/freeradius/modules/linelog including configuration file /etc/freeradius/modules/pam including configuration file /etc/freeradius/modules/mac2ip including configuration file /etc/freeradius/modules/perl including configuration file /etc/freeradius/modules/chap including configuration file /etc/freeradius/modules/checkval including configuration file /etc/freeradius/modules/smsotp including configuration file /etc/freeradius/modules/etc_group including configuration file /etc/freeradius/modules/digest including configuration file /etc/freeradius/modules/always including configuration file /etc/freeradius/modules/detail.example.com including configuration file /etc/freeradius/modules/krb5 including configuration file /etc/freeradius/modules/expiration including configuration file /etc/freeradius/modules/mschap including configuration file /etc/freeradius/modules/exec including configuration file /etc/freeradius/modules/policy including configuration file /etc/freeradius/modules/counter including configuration file /etc/freeradius/modules/sqlcounter_expire_on_login including configuration file /etc/freeradius/modules/otp including configuration file /etc/freeradius/modules/mac2vlan including configuration file /etc/freeradius/modules/acct_unique including configuration file /etc/freeradius/modules/wimax including configuration file /etc/freeradius/modules/passwd including configuration file /etc/freeradius/modules/smbpasswd including configuration file /etc/freeradius/modules/attr_rewrite including configuration file /etc/freeradius/modules/expr including configuration file /etc/freeradius/modules/detail.log including configuration file /etc/freeradius/modules/inner-eap including configuration file /etc/freeradius/modules/cui including configuration file /etc/freeradius/modules/logintime including configuration file /etc/freeradius/modules/preprocess including configuration file /etc/freeradius/eap.conf including configuration file /etc/freeradius/policy.conf including files in directory /etc/freeradius/sites-enabled/ including configuration file /etc/freeradius/sites-enabled/inner-tunnel including configuration file /etc/freeradius/sites-enabled/default main { user = "freerad" group = "freerad" allow_core_dumps = no } including dictionary file /etc/freeradius/dictionary main { prefix = "/usr" localstatedir = "/var" logdir = "/var/log/freeradius" libdir = "/usr/lib/freeradius" radacctdir = "/var/log/freeradius/radacct" hostname_lookups = no max_request_time = 30 cleanup_delay = 5 max_requests = 1024 pidfile = "/var/run/freeradius/freeradius.pid" checkrad = "/usr/sbin/checkrad" debug_level = 0 proxy_requests = yes log { stripped_names = no auth = no auth_badpass = no auth_goodpass = no } security { max_attributes = 200 reject_delay = 1 status_server = yes } } radiusd: #### Loading Realms and Home Servers #### proxy server { retry_delay = 5 retry_count = 3 default_fallback = no dead_time = 120 wake_all_if_all_dead = no } home_server localhost { ipaddr = 127.0.0.1 port = 1812 type = "auth" secret = "testing123" response_window = 20 max_outstanding = 65536 require_message_authenticator = no zombie_period = 40 status_check = "status-server" ping_interval = 30 check_interval = 30 num_answers_to_alive = 3 num_pings_to_alive = 3 revive_interval = 120 status_check_timeout = 4 irt = 2 mrt = 16 mrc = 5 mrd = 30 } home_server_pool my_auth_failover { type = fail-over home_server = localhost } realm example.com { auth_pool = my_auth_failover } realm LOCAL { } radiusd: #### Loading Clients #### client localhost { ipaddr = 127.0.0.1 require_message_authenticator = no secret = "testing123" nastype = "other" } client 10.12.88.0/23 { require_message_authenticator = no secret = "********" shortname = "ap" } radiusd: #### Instantiating modules #### instantiate { Module: Linked to module rlm_exec Module: Instantiating exec exec { wait = no input_pairs = "request" shell_escape = yes } Module: Linked to module rlm_expr Module: Instantiating expr Module: Linked to module rlm_expiration Module: Instantiating expiration expiration { reply-message = "Password Has Expired " } Module: Linked to module rlm_logintime Module: Instantiating logintime logintime { reply-message = "You are calling outside your allowed timespan " minimum-timeout = 60 } } radiusd: #### Loading Virtual Servers #### server inner-tunnel { modules { Module: Checking authenticate {...} for more modules to load Module: Linked to module rlm_pap Module: Instantiating pap pap { encryption_scheme = "auto" auto_header = no } Module: Linked to module rlm_chap Module: Instantiating chap Module: Linked to module rlm_mschap Module: Instantiating mschap mschap { use_mppe = yes require_encryption = no require_strong = no with_ntdomain_hack = no } Module: Linked to module rlm_unix Module: Instantiating unix unix { radwtmp = "/var/log/freeradius/radwtmp" } Module: Linked to module rlm_eap Module: Instantiating eap eap { default_eap_type = "md5" timer_expire = 60 ignore_unknown_eap_types = no cisco_accounting_username_bug = no max_sessions = 4096 } Module: Linked to sub-module rlm_eap_md5 Module: Instantiating eap-md5 Module: Linked to sub-module rlm_eap_leap Module: Instantiating eap-leap Module: Linked to sub-module rlm_eap_gtc Module: Instantiating eap-gtc gtc { challenge = "Password: " auth_type = "PAP" } Module: Linked to sub-module rlm_eap_tls Module: Instantiating eap-tls tls { rsa_key_exchange = no dh_key_exchange = yes rsa_key_length = 512 dh_key_length = 512 verify_depth = 0 pem_file_type = yes private_key_file = "/etc/freeradius/certs/radiuskey.pem" certificate_file = "/etc/freeradius/certs/radiuscert.pem" CA_file = "/etc/freeradius/certs/cacert.pem" private_key_password = "********" dh_file = "/etc/freeradius/certs/dh" random_file = "/dev/urandom" fragment_size = 1024 include_length = yes check_crl = no cipher_list = "DEFAULT" make_cert_command = "/etc/freeradius/certs/bootstrap" cache { enable = no lifetime = 24 max_entries = 255 } } Module: Linked to sub-module rlm_eap_ttls Module: Instantiating eap-ttls ttls { default_eap_type = "md5" copy_request_to_tunnel = no use_tunneled_reply = no virtual_server = "inner-tunnel" include_length = yes } Module: Linked to sub-module rlm_eap_peap Module: Instantiating eap-peap peap { default_eap_type = "mschapv2" copy_request_to_tunnel = no use_tunneled_reply = no proxy_tunneled_request_as_eap = yes virtual_server = "inner-tunnel" } Module: Linked to sub-module rlm_eap_mschapv2 Module: Instantiating eap-mschapv2 mschapv2 { with_ntdomain_hack = no } Module: Checking authorize {...} for more modules to load Module: Linked to module rlm_realm Module: Instantiating suffix realm suffix { format = "suffix" delimiter = "@" ignore_default = no ignore_null = no } Module: Linked to module rlm_files Module: Instantiating files files { usersfile = "/etc/freeradius/users" acctusersfile = "/etc/freeradius/acct_users" preproxy_usersfile = "/etc/freeradius/preproxy_users" compat = "no" } Module: Linked to module rlm_ldap Module: Instantiating ldap ldap { server = "auth.chem.umass.edu" port = 389 password = "*********" identity = "cn=admin,dc=cns" net_timeout = 1 timeout = 4 timelimit = 3 tls_mode = no start_tls = no tls_require_cert = "allow" tls { start_tls = no require_cert = "allow" } basedn = "dc=cns" filter = "(uid=%{Stripped-User-Name:-%{User-Name}})" base_filter = "(objectclass=radiusprofile)" auto_header = no access_attr_used_for_allow = yes groupname_attribute = "cn" groupmembership_filter = "(|(&(objectClass=GroupOfNames)(member=%{Ldap-UserDn}))(&(objectClass=GroupOfUniqueNames)(uniquemember=%{Ldap-UserDn})))" dictionary_mapping = "/etc/freeradius/ldap.attrmap" ldap_debug = 0 ldap_connections_number = 5 compare_check_items = no do_xlat = yes edir_account_policy_check = no set_auth_type = yes } rlm_ldap: Registering ldap_groupcmp for Ldap-Group rlm_ldap: Registering ldap_xlat with xlat_name ldap rlm_ldap: Over-riding set_auth_type, as there is no module ldap listed in the "authenticate" section. rlm_ldap: reading ldap<->radius mappings from file /etc/freeradius/ldap.attrmap rlm_ldap: LDAP radiusCheckItem mapped to RADIUS $GENERIC$ rlm_ldap: LDAP radiusReplyItem mapped to RADIUS $GENERIC$ rlm_ldap: LDAP radiusAuthType mapped to RADIUS Auth-Type rlm_ldap: LDAP radiusSimultaneousUse mapped to RADIUS Simultaneous-Use rlm_ldap: LDAP radiusCalledStationId mapped to RADIUS Called-Station-Id rlm_ldap: LDAP radiusCallingStationId mapped to RADIUS Calling-Station-Id rlm_ldap: LDAP lmPassword mapped to RADIUS LM-Password rlm_ldap: LDAP ntPassword mapped to RADIUS NT-Password rlm_ldap: LDAP sambaLmPassword mapped to RADIUS LM-Password rlm_ldap: LDAP sambaNtPassword mapped to RADIUS NT-Password rlm_ldap: LDAP dBCSPwd mapped to RADIUS LM-Password rlm_ldap: LDAP acctFlags mapped to RADIUS SMB-Account-CTRL-TEXT rlm_ldap: LDAP radiusExpiration mapped to RADIUS Expiration rlm_ldap: LDAP radiusNASIpAddress mapped to RADIUS NAS-IP-Address rlm_ldap: LDAP radiusServiceType mapped to RADIUS Service-Type rlm_ldap: LDAP radiusFramedProtocol mapped to RADIUS Framed-Protocol rlm_ldap: LDAP radiusFramedIPAddress mapped to RADIUS Framed-IP-Address rlm_ldap: LDAP radiusFramedIPNetmask mapped to RADIUS Framed-IP-Netmask rlm_ldap: LDAP radiusFramedRoute mapped to RADIUS Framed-Route rlm_ldap: LDAP radiusFramedRouting mapped to RADIUS Framed-Routing rlm_ldap: LDAP radiusFilterId mapped to RADIUS Filter-Id rlm_ldap: LDAP radiusFramedMTU mapped to RADIUS Framed-MTU rlm_ldap: LDAP radiusFramedCompression mapped to RADIUS Framed-Compression rlm_ldap: LDAP radiusLoginIPHost mapped to RADIUS Login-IP-Host rlm_ldap: LDAP radiusLoginService mapped to RADIUS Login-Service rlm_ldap: LDAP radiusLoginTCPPort mapped to RADIUS Login-TCP-Port rlm_ldap: LDAP radiusCallbackNumber mapped to RADIUS Callback-Number rlm_ldap: LDAP radiusCallbackId mapped to RADIUS Callback-Id rlm_ldap: LDAP radiusFramedIPXNetwork mapped to RADIUS Framed-IPX-Network rlm_ldap: LDAP radiusClass mapped to RADIUS Class rlm_ldap: LDAP radiusSessionTimeout mapped to RADIUS Session-Timeout rlm_ldap: LDAP radiusIdleTimeout mapped to RADIUS Idle-Timeout rlm_ldap: LDAP radiusTerminationAction mapped to RADIUS Termination-Action rlm_ldap: LDAP radiusLoginLATService mapped to RADIUS Login-LAT-Service rlm_ldap: LDAP radiusLoginLATNode mapped to RADIUS Login-LAT-Node rlm_ldap: LDAP radiusLoginLATGroup mapped to RADIUS Login-LAT-Group rlm_ldap: LDAP radiusFramedAppleTalkLink mapped to RADIUS Framed-AppleTalk-Link rlm_ldap: LDAP radiusFramedAppleTalkNetwork mapped to RADIUS Framed-AppleTalk-Network rlm_ldap: LDAP radiusFramedAppleTalkZone mapped to RADIUS Framed-AppleTalk-Zone rlm_ldap: LDAP radiusPortLimit mapped to RADIUS Port-Limit rlm_ldap: LDAP radiusLoginLATPort mapped to RADIUS Login-LAT-Port rlm_ldap: LDAP radiusReplyMessage mapped to RADIUS Reply-Message rlm_ldap: LDAP radiusTunnelType mapped to RADIUS Tunnel-Type rlm_ldap: LDAP radiusTunnelMediumType mapped to RADIUS Tunnel-Medium-Type rlm_ldap: LDAP radiusTunnelPrivateGroupId mapped to RADIUS Tunnel-Private-Group-Id conns: 0x818e078 Module: Checking session {...} for more modules to load Module: Linked to module rlm_radutmp Module: Instantiating radutmp radutmp { filename = "/var/log/freeradius/radutmp" username = "%{User-Name}" case_sensitive = yes check_with_nas = yes perm = 384 callerid = yes } Module: Checking post-proxy {...} for more modules to load Module: Checking post-auth {...} for more modules to load Module: Linked to module rlm_attr_filter Module: Instantiating attr_filter.access_reject attr_filter attr_filter.access_reject { attrsfile = "/etc/freeradius/attrs.access_reject" key = "%{User-Name}" } } # modules } # server server { modules { Module: Checking authenticate {...} for more modules to load Module: Checking authorize {...} for more modules to load Module: Linked to module rlm_preprocess Module: Instantiating preprocess preprocess { huntgroups = "/etc/freeradius/huntgroups" hints = "/etc/freeradius/hints" with_ascend_hack = no ascend_channels_per_line = 23 with_ntdomain_hack = no with_specialix_jetstream_hack = no with_cisco_vsa_hack = no with_alvarion_vsa_hack = no } Module: Checking preacct {...} for more modules to load Module: Linked to module rlm_acct_unique Module: Instantiating acct_unique acct_unique { key = "User-Name, Acct-Session-Id, NAS-IP-Address, Client-IP-Address, NAS-Port" } Module: Checking accounting {...} for more modules to load Module: Linked to module rlm_detail Module: Instantiating detail detail { detailfile = "/var/log/freeradius/radacct/%{Client-IP-Address}/detail-%Y%m%d" header = "%t" detailperm = 384 dirperm = 493 locking = no log_packet_header = no } Module: Instantiating attr_filter.accounting_response attr_filter attr_filter.accounting_response { attrsfile = "/etc/freeradius/attrs.accounting_response" key = "%{User-Name}" } Module: Checking session {...} for more modules to load Module: Checking post-proxy {...} for more modules to load Module: Checking post-auth {...} for more modules to load } # modules } # server radiusd: #### Opening IP addresses and Ports #### listen { type = "auth" ipaddr = * port = 0 } listen { type = "acct" ipaddr = * port = 0 } Listening on authentication address * port 1812 Listening on accounting address * port 1813 Listening on proxy address * port 1814 Ready to process requests. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% The following displays when a client connects. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% rad_recv: Access-Request packet from host 10.12.88.13 port 2048, id=0, length=125 User-Name = "jmaher" NAS-IP-Address = 10.12.88.13 Called-Station-Id = "002129a58514" Calling-Station-Id = "001cbf31b3b5" NAS-Identifier = "002129a58514" NAS-Port = 55 Framed-MTU = 1400 NAS-Port-Type = Wireless-802.11 EAP-Message = 0x0200000b016a6d61686572 Message-Authenticator = 0x97f3c529d6f8cd6d67afdf5fa8a122c2 +- entering group authorize {...} ++[preprocess] returns ok ++[chap] returns noop ++[mschap] returns noop [suffix] No '@' in User-Name = "jmaher", looking up realm NULL [suffix] No such realm "NULL" ++[suffix] returns noop [eap] EAP packet type response id 0 length 11 [eap] No EAP Start, assuming it's an on-going EAP conversation ++[eap] returns updated ++[unix] returns updated [ldap] Entering ldap_groupcmp() [files] expand: dc=cns -> dc=cns [files] WARNING: Deprecated conditional expansion ":-". See "man unlang" for details [files] ... expanding second conditional [files] expand: %{User-Name} -> jmaher [files] expand: (uid=%{Stripped-User-Name:-%{User-Name}}) -> (uid=jmaher) [ldap] ldap_get_conn: Checking Id: 0 [ldap] ldap_get_conn: Got Id: 0 [ldap] attempting LDAP reconnection [ldap] (re)connect to auth.chem.umass.edu:389, authentication 0 [ldap] bind as cn=admin,dc=cns/**********wcibk@mD to auth.chem.umass.edu:389 [ldap] waiting for bind result ... [ldap] Bind was successful [ldap] performing search in dc=cns, with filter (uid=jmaher) [ldap] ldap_release_conn: Release Id: 0 [files] expand: (|(&(objectClass=GroupOfNames)(member=%{Ldap-UserDn}))(&(objectClass=GroupOfUniqueNames)(uniquemember=%{Ldap-UserDn}))) -> (|(&(objectClass=GroupOfNames)(member=))(&(objectClass=GroupOfUniqueNames)(uniquemember=))) [ldap] ldap_get_conn: Checking Id: 0 [ldap] ldap_get_conn: Got Id: 0 [ldap] performing search in dc=cns, with filter (&(cn=vpn-users)(|(&(objectClass=GroupOfNames)(member=))(&(objectClass=GroupOfUniqueNames)(uniquemember=)))) [ldap] object not found [ldap] ldap_release_conn: Release Id: 0 rlm_ldap::ldap_groupcmp: Group vpn-users not found or user is not a member. ++[files] returns noop [ldap] performing user authorization for jmaher [ldap] WARNING: Deprecated conditional expansion ":-". See "man unlang" for details [ldap] ... expanding second conditional [ldap] expand: %{User-Name} -> jmaher [ldap] expand: (uid=%{Stripped-User-Name:-%{User-Name}}) -> (uid=jmaher) [ldap] expand: dc=cns -> dc=cns [ldap] ldap_get_conn: Checking Id: 0 [ldap] ldap_get_conn: Got Id: 0 [ldap] performing search in dc=cns, with filter (uid=jmaher) [ldap] No default NMAS login sequence [ldap] looking for check items in directory... [ldap] sambaNtPassword -> NT-Password == 0x4537353238434135323632453745303645438324444363635383830453042333 [ldap] sambaLmPassword -> LM-Password == 0x3743414639453142313632453745303645463337453431343231373532384341 [ldap] looking for reply items in directory... WARNING: No "known good" password was found in LDAP. Are you sure that the user is configured correctly? [ldap] user jmaher authorized to use remote access [ldap] ldap_release_conn: Release Id: 0 ++[ldap] returns ok ++[expiration] returns noop ++[logintime] returns noop [pap] Normalizing NT-Password from hex encoding [pap] Normalizing LM-Password from hex encoding [pap] Found existing Auth-Type, not changing it. ++[pap] returns noop Found Auth-Type = EAP +- entering group authenticate {...} [eap] EAP Identity [eap] processing type md5 rlm_eap_md5: Issuing Challenge ++[eap] returns handled Sending Access-Challenge of id 0 to 10.12.88.13 port 2048 EAP-Message = 0x01010016041093940db5446be686982b01b8674bc247 Message-Authenticator = 0x00000000000000000000000000000000 State = 0xa5171280a516162260366d28d5bb6b66 Finished request 0. Going to the next request Waking up in 4.9 seconds. Cleaning up request 0 ID 0 with timestamp +57 Ready to process requests.