I've been following the guide at http://wiki.freeradius.org/guide/Mac-Auth I completed the section called Mac-Auth and 802.1x The issue im having is with the rewrite_calling_station_id. If I comment this out and make sure the authorized_macs file has the mac listed just like the access point sends it everything works. The problem is not all access points send the mac in the same format. Some may send it in upper case and some in lower case and with 30 plus access points I need to make sure its formatted correctly Which is what rewrite_calling_station_id should do. In the log below authorized_macs has the mac address in lower case. rewrite_calling_station_id should should solve this but does not. In order to get it working I commented out rewrite_calling_station_id and changed the mac in the authorized_macs file to upper case. I'm using ubuntu 10.4, FreeRADIUS Version 2.1.8 I noticed this WARNING: Unknown module "tolower" in string expansion "%" in the rejected log. I have searched for a tolower program but can not find one to install. What package is tolower part of ? What am I missing? Here is the policy.conf file # Rewrite called station id attribute into a standard format. # rewrite_calling_station_id { if (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i){ update request { Calling-Station-Id := "%{tolower:%{1}-%{2}-%{3}-%{4}-%{5}-%{6}}" } } else { noop } } Here is the rejected log FreeRADIUS Version 2.1.8, for host i486-pc-linux-gnu, built on Jan 5 2010 at 02:49:11 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/cui including configuration file /etc/freeradius/modules/sqlcounter_expire_on_login including configuration file /etc/freeradius/modules/etc_group including configuration file /etc/freeradius/modules/detail.example.com including configuration file /etc/freeradius/modules/otp including configuration file /etc/freeradius/modules/logintime including configuration file /etc/freeradius/modules/radutmp including configuration file /etc/freeradius/modules/inner-eap including configuration file /etc/freeradius/modules/chap including configuration file /etc/freeradius/modules/ldap including configuration file /etc/freeradius/modules/detail including configuration file /etc/freeradius/modules/attr_rewrite including configuration file /etc/freeradius/modules/mac2vlan including configuration file /etc/freeradius/modules/sql_log including configuration file /etc/freeradius/modules/expr including configuration file /etc/freeradius/modules/checkval including configuration file /etc/freeradius/modules/passwd including configuration file /etc/freeradius/modules/exec including configuration file /etc/freeradius/modules/smsotp including configuration file /etc/freeradius/modules/krb5 including configuration file /etc/freeradius/modules/wimax including configuration file /etc/freeradius/modules/perl including configuration file /etc/freeradius/modules/realm including configuration file /etc/freeradius/modules/attr_filter including configuration file /etc/freeradius/modules/smbpasswd including configuration file /etc/freeradius/modules/policy including configuration file /etc/freeradius/modules/ntlm_auth including configuration file /etc/freeradius/modules/files including configuration file /etc/freeradius/modules/counter including configuration file /etc/freeradius/modules/echo including configuration file /etc/freeradius/modules/acct_unique including configuration file /etc/freeradius/modules/unix including configuration file /etc/freeradius/modules/ippool including configuration file /etc/freeradius/modules/mac2ip including configuration file /etc/freeradius/modules/digest including configuration file /etc/freeradius/modules/expiration including configuration file /etc/freeradius/modules/always including configuration file /etc/freeradius/modules/mschap including configuration file /etc/freeradius/modules/detail.log including configuration file /etc/freeradius/modules/sradutmp including configuration file /etc/freeradius/modules/linelog including configuration file /etc/freeradius/modules/pam including configuration file /etc/freeradius/modules/pap 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 10.1.0.66 { require_message_authenticator = no secret = "testing123" 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 = "peap" 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/server.key" certificate_file = "/etc/freeradius/certs/server.pem" CA_file = "/etc/freeradius/certs/ca.pem" private_key_password = "whatever" dh_file = "/etc/freeradius/certs/dh" random_file = "/etc/freeradius/certs/random" 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: 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: Loading virtual module rewrite_calling_station_id Module: Linked to module rlm_always Module: Instantiating noop always noop { rcode = "noop" simulcount = 0 mpp = no } Module: Instantiating authorized_macs files authorized_macs { usersfile = "/etc/freeradius/authorized_macs" compat = "no" key = "%{Calling-Station-ID}" } Module: Instantiating reject always reject { rcode = "reject" simulcount = 0 mpp = 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. rad_recv: Access-Request packet from host 10.1.0.66 port 1520, id=0, length=198 Message-Authenticator = 0x8e5270705f13e5bf4d6bf9b89ee8b33b Service-Type = Framed-User User-Name = "aaron" Framed-MTU = 1488 Called-Station-Id = "40-01-C6-DD-CB-40:test-2.4GHz" Calling-Station-Id = "00-14-A4-1E-FF-B6" NAS-Identifier = "Access-Point-22" NAS-Port-Type = Wireless-802.11 Connect-Info = "CONNECT 54Mbps 802.11g" EAP-Message = 0x0200000a016161726f6e NAS-IP-Address = 10.1.0.66 NAS-Port = 1 NAS-Port-Id = "STA port # 1" +- entering group authorize {...} ++[preprocess] returns ok ++- entering policy rewrite_calling_station_id {...} +++? if (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i) ? Evaluating (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i) -> TRUE +++? if (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i) -> TRUE +++- entering if (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i) {...} WARNING: Unknown module "tolower" in string expansion "%" ++++[request] returns ok +++- if (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i) returns ok +++ ... skipping else for request 0: Preceding "if" was taken ++- policy rewrite_calling_station_id returns ok [authorized_macs] expand: %{Calling-Station-ID} -> ++[authorized_macs] returns noop ++? if (!ok) ? Evaluating !(ok) -> TRUE ++? if (!ok) -> TRUE ++- entering if (!ok) {...} +++[reject] returns reject ++- if (!ok) returns reject Using Post-Auth-Type Reject +- entering group REJECT {...} [attr_filter.access_reject] expand: %{User-Name} -> aaron attr_filter: Matched entry DEFAULT at line 11 ++[attr_filter.access_reject] returns updated Delaying reject of request 0 for 1 seconds Going to the next request Waking up in 0.9 seconds. Sending delayed reject for request 0 Sending Access-Reject of id 0 to 10.1.0.66 port 1520 Waking up in 4.9 seconds. rad_recv: Access-Request packet from host 10.1.0.66 port 1522, id=0, length=198 Message-Authenticator = 0x770f506840dc4d2173ef986496b52844 Service-Type = Framed-User User-Name = "aaron" Framed-MTU = 1488 Called-Station-Id = "40-01-C6-DD-CB-40:test-2.4GHz" Calling-Station-Id = "00-14-A4-1E-FF-B6" NAS-Identifier = "Access-Point-22" NAS-Port-Type = Wireless-802.11 Connect-Info = "CONNECT 54Mbps 802.11g" EAP-Message = 0x0200000a016161726f6e NAS-IP-Address = 10.1.0.66 NAS-Port = 1 NAS-Port-Id = "STA port # 1" +- entering group authorize {...} ++[preprocess] returns ok ++- entering policy rewrite_calling_station_id {...} +++? if (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i) ? Evaluating (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i) -> TRUE +++? if (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i) -> TRUE +++- entering if (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i) {...} WARNING: Unknown module "tolower" in string expansion "%" ++++[request] returns ok +++- if (Calling-Station-Id =~ /([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})[-:]?([0-9a-f]{2})/i) returns ok +++ ... skipping else for request 1: Preceding "if" was taken ++- policy rewrite_calling_station_id returns ok [authorized_macs] expand: %{Calling-Station-ID} -> ++[authorized_macs] returns noop ++? if (!ok) ? Evaluating !(ok) -> TRUE ++? if (!ok) -> TRUE ++- entering if (!ok) {...} +++[reject] returns reject ++- if (!ok) returns reject Using Post-Auth-Type Reject +- entering group REJECT {...} [attr_filter.access_reject] expand: %{User-Name} -> aaron attr_filter: Matched entry DEFAULT at line 11 ++[attr_filter.access_reject] returns updated Delaying reject of request 1 for 1 seconds Going to the next request Waking up in 0.9 seconds. Sending delayed reject for request 1 Sending Access-Reject of id 0 to 10.1.0.66 port 1522 Waking up in 3.5 seconds. Cleaning up request 0 ID 0 with timestamp +16 Waking up in 1.4 seconds. Cleaning up request 1 ID 0 with timestamp +17 Ready to process requests.