Sorry, I should have mentioned I already tried man rlm_passwd and couldn't figure it out. I've been through it again and have made the following changes: 1. created a file /etc/raddb/path_group path_group:user1,user2,user3,user4,user5 2. Added the following to /etc/raddb/dictionary ATTRIBUTE User_Group_Name 3003 string 3. Added to modules/passwd filename = /etc/raddb/path_group hashsize = 20 allowmultiplekeys = yes format = "~User_Group_Name:*,User-Name" 4. Also edited modules/etc_group because I couldn't make out which file to put these items in passwd etc_group { filename = /etc/raddb/path_group format = "~User_Group_Name:*,User-Name" hashsize = 50 ignorenislike = no allowmultiplekeys = yes delimiter = ":" } 5. Inserted this into the post-auth section of sites-enabled/default if ("%{User_Group_Name}" == path_group) { update reply { Reply-Message := "You are not allowed here" } reject } Debug output is: FreeRADIUS Version 2.1.6, for host i686-pc-linux-gnu, built on Nov 20 2009 at 09:43:24 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/raddb/radiusd.conf including configuration file /etc/raddb/proxy.conf including configuration file /etc/raddb/clients.conf including files in directory /etc/raddb/modules/ including configuration file /etc/raddb/modules/inner-eap including configuration file /etc/raddb/modules/pap including configuration file /etc/raddb/modules/ippool including configuration file /etc/raddb/modules/expiration including configuration file /etc/raddb/modules/files including configuration file /etc/raddb/modules/attr_rewrite including configuration file /etc/raddb/modules/detail.example.com including configuration file /etc/raddb/modules/exec including configuration file /etc/raddb/modules/etc_group including configuration file /etc/raddb/modules/preprocess including configuration file /etc/raddb/modules/ntlm_auth including configuration file /etc/raddb/modules/detail.log including configuration file /etc/raddb/modules/passwd including configuration file /etc/raddb/modules/linelog including configuration file /etc/raddb/modules/radutmp including configuration file /etc/raddb/modules/smsotp including configuration file /etc/raddb/modules/mac2ip including configuration file /etc/raddb/modules/logintime including configuration file /etc/raddb/modules/unix including configuration file /etc/raddb/modules/attr_filter including configuration file /etc/raddb/modules/ldap including configuration file /etc/raddb/modules/counter including configuration file /etc/raddb/modules/mac2vlan including configuration file /etc/raddb/modules/sqlcounter_expire_on_login including configuration file /etc/raddb/modules/always including configuration file /etc/raddb/modules/expr including configuration file /etc/raddb/modules/sradutmp including configuration file /etc/raddb/modules/policy including configuration file /etc/raddb/modules/wimax including configuration file /etc/raddb/modules/sql_log including configuration file /etc/raddb/modules/realm including configuration file /etc/raddb/modules/echo including configuration file /etc/raddb/modules/acct_unique including configuration file /etc/raddb/modules/otp including configuration file /etc/raddb/modules/mschap including configuration file /etc/raddb/modules/krb5 including configuration file /etc/raddb/modules/smbpasswd including configuration file /etc/raddb/modules/checkval including configuration file /etc/raddb/modules/digest including configuration file /etc/raddb/modules/pam including configuration file /etc/raddb/modules/chap including configuration file /etc/raddb/modules/perl including configuration file /etc/raddb/modules/detail including configuration file /etc/raddb/eap.conf including configuration file /etc/raddb/policy.conf including files in directory /etc/raddb/sites-enabled/ including configuration file /etc/raddb/sites-enabled/control-socket including configuration file /etc/raddb/sites-enabled/inner-tunnel including configuration file /etc/raddb/sites-enabled/default group = radiusd user = radiusd including dictionary file /etc/raddb/dictionary main { prefix = "/usr" localstatedir = "/var" logdir = "/home/radlogs" libdir = "/usr/lib/freeradius" radacctdir = "/home/radlogs/radacct" hostname_lookups = no max_request_time = 30 cleanup_delay = 5 max_requests = 1024 allow_core_dumps = no pidfile = "/var/run/radiusd/radiusd.pid" checkrad = "/usr/sbin/checkrad" debug_level = 0 proxy_requests = yes log { stripped_names = no auth = yes 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 = "**********" 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 = "********" nastype = "other" } client xxx.xxx.xxx.xx { require_message_authenticator = no secret = "********" shortname = "self" } client xxx.xxx.x.x/16 { require_message_authenticator = no secret = "xxxxxxxx" shortname = "Anyone" nastype = "pc" } 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 = "/home/radlogs/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 = 2048 } 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/raddb/certs/server.pem" certificate_file = "/etc/raddb/certs/server.pem" CA_file = "/etc/raddb/certs/ca.pem" private_key_password = "whatever" dh_file = "/etc/raddb/certs/dh" random_file = "/etc/raddb/certs/random" fragment_size = 1024 include_length = yes check_crl = no cipher_list = "DEFAULT" make_cert_command = "/etc/raddb/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: Instantiating ntlm_auth exec ntlm_auth { wait = yes program = "/usr/bin/ntlm_auth --request-nt-key --domain=******* --username=%{mschap:User-Name} --password=%{User-Password}" input_pairs = "request" shell_escape = yes } 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/raddb/users" acctusersfile = "/etc/raddb/acct_users" preproxy_usersfile = "/etc/raddb/preproxy_users" compat = "no" } Module: Checking session {...} for more modules to load Module: Linked to module rlm_radutmp Module: Instantiating radutmp radutmp { filename = "/home/radlogs/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/raddb/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/raddb/huntgroups" hints = "/etc/raddb/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 = "/home/radlogs/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/raddb/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 Module: Linked to module rlm_always Module: Instantiating reject always reject { rcode = "reject" simulcount = 0 mpp = no } } # modules } # server radiusd: #### Opening IP addresses and Ports #### listen { type = "auth" ipaddr = xxx.xxx.xxx.xx port = 0 } listen { type = "acct" ipaddr = * port = 0 } listen { type = "control" listen { socket = "/var/run/radiusd/radiusd.sock" } } Listening on authentication address xxx.xxx.xxx.xx port 1812 Listening on accounting address * port 1813 Listening on command file /var/run/radiusd/radiusd.sock Listening on proxy address xxx.xxx.xxx.xx port 1814 Ready to process requests. rad_recv: Access-Request packet from host xxx.xxx.xxx.xx port 50600, id=177, length=60 User-Name = "********" User-Password = "********" NAS-IP-Address = 127.0.0.2 NAS-Port = 0 +- entering group authorize {...} ++[preprocess] returns ok ++[chap] returns noop ++[mschap] returns noop [suffix] No '@' in User-Name = "********", looking up realm NULL [suffix] No such realm "NULL" ++[suffix] returns noop [eap] No EAP-Message, not doing EAP ++[eap] returns noop ++[unix] returns notfound [files] users: Matched entry ******** at line 7 ++[files] returns ok ++[expiration] returns noop ++[logintime] returns noop [pap] WARNING! No "known good" password found for the user. Authentication may fail because of this. ++[pap] returns noop Found Auth-Type = ntlm_auth +- entering group authenticate {...} [ntlm_auth] expand: --username=%{mschap:User-Name} -> --username=******** [ntlm_auth] expand: --password=%{User-Password} -> --password=******** Exec-Program output: NT_STATUS_OK: Success (0x0) Exec-Program-Wait: plaintext: NT_STATUS_OK: Success (0x0) Exec-Program: returned: 0 ++[ntlm_auth] returns ok Login OK: [********] (from client self port 0) +- entering group post-auth {...} ++[exec] returns noop ++? if ("%{User_Group_Name}" == path_group) expand: %{User_Group_Name} -> ? Evaluating ("%{User_Group_Name}" == path_group) -> FALSE ++? if ("%{User_Group_Name}" == path_group) -> FALSE Sending Access-Accept of id 177 to xxx.xxx.xxx.xx port 50600 Finished request 0. Going to the next request Waking up in 4.9 seconds. The User_Group_Name attribute doesn't seem to get created/populated so when I check it in post-auth it is null. What have I missed? Thanks, Mark Whitmarsh. ________________________________________ From: freeradius-users-bounces+mark.whitmarsh=nhs.net@lists.freeradius.org [freeradius-users-bounces+mark.whitmarsh=nhs.net@lists.freeradius.org] On Behalf Of Alan DeKok [aland@deployingradius.com] Sent: 26 May 2010 18:53 To: FreeRadius users mailing list Subject: Re: Restricting certain users access to certain NAS devices Whitmarsh Mark (Leeds Teaching Hospitals NHS Trust) wrote:
The idea is that superusers are allowed to login to any of the 200 network devices whilst users are only allowed to login to a subset of say 50 devices. It's straightforward enough for the superusers and works fine but I'm stumped on how to handle the others. I have tested the following OK in sites-enabled/default:
Groups. See "man rlm_passwd". Create RADIUS-specific groups, and check them. Users can be in a group, *or* NASes. Alan DeKok. - List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html ******************************************************************************************************************** This message may contain confidential information. If you are not the intended recipient please inform the sender that you have received the message in error before deleting it. Please do not disclose, copy or distribute information in this e-mail or take any action in reliance on its contents: to do so is strictly prohibited and may be unlawful. Thank you for your co-operation. NHSmail is the secure email and directory service available for all NHS staff in England and Scotland NHSmail is approved for exchanging patient data and other sensitive information with NHSmail and GSI recipients NHSmail provides an email address for your career in the NHS and can be accessed anywhere For more information and to find out how you can switch, visit www.connectingforhealth.nhs.uk/nhsmail ********************************************************************************************************************