Hi, I have a customer running a Fortigate SSL-VPN solution authenticating users via RADIUS (PAP) towards a Gemalto SAS OTP solution. The user just use the Gemalto MobilePASS app to generate an OTP code and enters that into the password field, which works fine. However, he now wants to first authenticate the user with username/AD-password via LDAP against their AD, and if successful, the user should be prompted for the OTP code as a second step. This is currently not possible with the Gemalto SAS solution, so I’m therefor trying to deploy a FreeRADIUS (v3.0.13 on CentOS7) server in between and have FR perform the AD auth, return an Access-Challenge and then proxy the second Access-Request with the OTP code to Gemalto RADIUS. I’ve successfully managed to independently configure FR with the LDAP module to authenticate the username/password against their AD, or configure it as a proxy to send the requests to Gemalto, but I can’t really figure out how to chain these two auth methods together. After I enabled proxying of NULL realm, the first auth request is sent straight on to Gemalto. Is it even possible with pure configuration, or would I have to patch the two modules to accomplish this? Any hints would be greatly appreciated. PS: I have no need for authorizing the user AD group belongings etc in FR, this is done in the second step by Gemalto anyway. I just need pure authentication against the AD in step 1. This is what I got so far: FreeRADIUS Version 3.0.13 Copyright (C) 1999-2017 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 For more information about these matters, see the file named COPYRIGHT Starting - reading configuration files ... including dictionary file /usr/share/freeradius/dictionary including dictionary file /usr/share/freeradius/dictionary.dhcp including dictionary file /usr/share/freeradius/dictionary.vqp including dictionary file /etc/raddb/dictionary 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/mods-enabled/ including configuration file /etc/raddb/mods-enabled/always including configuration file /etc/raddb/mods-enabled/attr_filter including configuration file /etc/raddb/mods-enabled/cache_eap including configuration file /etc/raddb/mods-enabled/chap including configuration file /etc/raddb/mods-enabled/date including configuration file /etc/raddb/mods-enabled/detail including configuration file /etc/raddb/mods-enabled/detail.log including configuration file /etc/raddb/mods-enabled/dhcp including configuration file /etc/raddb/mods-enabled/digest including configuration file /etc/raddb/mods-enabled/dynamic_clients including configuration file /etc/raddb/mods-enabled/eap including configuration file /etc/raddb/mods-enabled/echo including configuration file /etc/raddb/mods-enabled/exec including configuration file /etc/raddb/mods-enabled/expiration including configuration file /etc/raddb/mods-enabled/expr including configuration file /etc/raddb/mods-enabled/files including configuration file /etc/raddb/mods-enabled/linelog including configuration file /etc/raddb/mods-enabled/logintime including configuration file /etc/raddb/mods-enabled/mschap including configuration file /etc/raddb/mods-enabled/ntlm_auth including configuration file /etc/raddb/mods-enabled/pap including configuration file /etc/raddb/mods-enabled/passwd including configuration file /etc/raddb/mods-enabled/preprocess including configuration file /etc/raddb/mods-enabled/radutmp including configuration file /etc/raddb/mods-enabled/realm including configuration file /etc/raddb/mods-enabled/replicate including configuration file /etc/raddb/mods-enabled/soh including configuration file /etc/raddb/mods-enabled/sradutmp including configuration file /etc/raddb/mods-enabled/unix including configuration file /etc/raddb/mods-enabled/unpack including configuration file /etc/raddb/mods-enabled/utf8 including configuration file /etc/raddb/mods-enabled/ldap including files in directory /etc/raddb/policy.d/ including configuration file /etc/raddb/policy.d/accounting including configuration file /etc/raddb/policy.d/canonicalization including configuration file /etc/raddb/policy.d/control including configuration file /etc/raddb/policy.d/cui including configuration file /etc/raddb/policy.d/debug including configuration file /etc/raddb/policy.d/dhcp including configuration file /etc/raddb/policy.d/eap including configuration file /etc/raddb/policy.d/filter including configuration file /etc/raddb/policy.d/operator-name including files in directory /etc/raddb/sites-enabled/ including configuration file /etc/raddb/sites-enabled/default including configuration file /etc/raddb/sites-enabled/inner-tunnel main { security { user = "radiusd" group = "radiusd" allow_core_dumps = no } name = "radiusd" prefix = "/usr" localstatedir = "/var" logdir = "/var/log/radius" run_dir = "/var/run/radiusd" } main { name = "radiusd" prefix = "/usr" localstatedir = "/var" sbindir = "/usr/sbin" logdir = "/var/log/radius" run_dir = "/var/run/radiusd" libdir = "/usr/lib64/freeradius" radacctdir = "/var/log/radius/radacct" hostname_lookups = no max_request_time = 30 cleanup_delay = 5 max_requests = 16384 pidfile = "/var/run/radiusd/radiusd.pid" checkrad = "/usr/sbin/checkrad" debug_level = 0 proxy_requests = yes log { stripped_names = no auth = no auth_badpass = no auth_goodpass = no colourise = yes msg_denied = "You are already logged in - access denied" } resources { } security { max_attributes = 200 reject_delay = 1.000000 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 = <<< secret >>> response_window = 20.000000 response_timeouts = 1 max_outstanding = 65536 zombie_period = 40 status_check = "status-server" ping_interval = 30 check_interval = 30 check_timeout = 4 num_answers_to_alive = 3 revive_interval = 120 limit { max_connections = 16 max_requests = 0 lifetime = 0 idle_timeout = 0 } coa { 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 { } realm NULL { authhost = 172.16.8.107:1812 accthost = 172.16.8.107:1813 secret = <<< secret >>> } radiusd: #### Loading Clients #### client localhost { ipaddr = 127.0.0.1 require_message_authenticator = no secret = <<< secret >>> nas_type = "other" proto = "*" limit { max_connections = 16 lifetime = 0 idle_timeout = 30 } } client localhost_ipv6 { ipv6addr = ::1 require_message_authenticator = no secret = <<< secret >>> limit { max_connections = 16 lifetime = 0 idle_timeout = 30 } } Debugger not attached # Creating Auth-Type = LDAP # Creating Auth-Type = mschap # Creating Auth-Type = eap # Creating Auth-Type = PAP # Creating Auth-Type = CHAP # Creating Auth-Type = MS-CHAP radiusd: #### Instantiating modules #### modules { # Loaded module rlm_always # Loading module "reject" from file /etc/raddb/mods-enabled/always always reject { rcode = "reject" simulcount = 0 mpp = no } # Loading module "fail" from file /etc/raddb/mods-enabled/always always fail { rcode = "fail" simulcount = 0 mpp = no } # Loading module "ok" from file /etc/raddb/mods-enabled/always always ok { rcode = "ok" simulcount = 0 mpp = no } # Loading module "handled" from file /etc/raddb/mods-enabled/always always handled { rcode = "handled" simulcount = 0 mpp = no } # Loading module "invalid" from file /etc/raddb/mods-enabled/always always invalid { rcode = "invalid" simulcount = 0 mpp = no } # Loading module "userlock" from file /etc/raddb/mods-enabled/always always userlock { rcode = "userlock" simulcount = 0 mpp = no } # Loading module "notfound" from file /etc/raddb/mods-enabled/always always notfound { rcode = "notfound" simulcount = 0 mpp = no } # Loading module "noop" from file /etc/raddb/mods-enabled/always always noop { rcode = "noop" simulcount = 0 mpp = no } # Loading module "updated" from file /etc/raddb/mods-enabled/always always updated { rcode = "updated" simulcount = 0 mpp = no } # Loaded module rlm_attr_filter # Loading module "attr_filter.post-proxy" from file /etc/raddb/mods-enabled/attr_filter attr_filter attr_filter.post-proxy { filename = "/etc/raddb/mods-config/attr_filter/post-proxy" key = "%{Realm}" relaxed = no } # Loading module "attr_filter.pre-proxy" from file /etc/raddb/mods-enabled/attr_filter attr_filter attr_filter.pre-proxy { filename = "/etc/raddb/mods-config/attr_filter/pre-proxy" key = "%{Realm}" relaxed = no } # Loading module "attr_filter.access_reject" from file /etc/raddb/mods-enabled/attr_filter attr_filter attr_filter.access_reject { filename = "/etc/raddb/mods-config/attr_filter/access_reject" key = "%{User-Name}" relaxed = no } # Loading module "attr_filter.access_challenge" from file /etc/raddb/mods-enabled/attr_filter attr_filter attr_filter.access_challenge { filename = "/etc/raddb/mods-config/attr_filter/access_challenge" key = "%{User-Name}" relaxed = no } # Loading module "attr_filter.accounting_response" from file /etc/raddb/mods-enabled/attr_filter attr_filter attr_filter.accounting_response { filename = "/etc/raddb/mods-config/attr_filter/accounting_response" key = "%{User-Name}" relaxed = no } # Loaded module rlm_cache # Loading module "cache_eap" from file /etc/raddb/mods-enabled/cache_eap cache cache_eap { driver = "rlm_cache_rbtree" key = "%{%{control:State}:-%{%{reply:State}:-%{State}}}" ttl = 15 max_entries = 0 epoch = 0 add_stats = no } # Loaded module rlm_chap # Loading module "chap" from file /etc/raddb/mods-enabled/chap # Loaded module rlm_date # Loading module "date" from file /etc/raddb/mods-enabled/date date { format = "%b %e %Y %H:%M:%S %Z" } # Loaded module rlm_detail # Loading module "detail" from file /etc/raddb/mods-enabled/detail detail { filename = "/var/log/radius/radacct/%{%{Packet-Src-IP-Address}:-%{Packet-Src-IPv6-Address}}/detail-%Y%m%d" header = "%t" permissions = 384 locking = no escape_filenames = no log_packet_header = no } # Loading module "auth_log" from file /etc/raddb/mods-enabled/detail.log detail auth_log { filename = "/var/log/radius/radacct/%{%{Packet-Src-IP-Address}:-%{Packet-Src-IPv6-Address}}/auth-detail-%Y%m%d" header = "%t" permissions = 384 locking = no escape_filenames = no log_packet_header = no } # Loading module "reply_log" from file /etc/raddb/mods-enabled/detail.log detail reply_log { filename = "/var/log/radius/radacct/%{%{Packet-Src-IP-Address}:-%{Packet-Src-IPv6-Address}}/reply-detail-%Y%m%d" header = "%t" permissions = 384 locking = no escape_filenames = no log_packet_header = no } # Loading module "pre_proxy_log" from file /etc/raddb/mods-enabled/detail.log detail pre_proxy_log { filename = "/var/log/radius/radacct/%{%{Packet-Src-IP-Address}:-%{Packet-Src-IPv6-Address}}/pre-proxy-detail-%Y%m%d" header = "%t" permissions = 384 locking = no escape_filenames = no log_packet_header = no } # Loading module "post_proxy_log" from file /etc/raddb/mods-enabled/detail.log detail post_proxy_log { filename = "/var/log/radius/radacct/%{%{Packet-Src-IP-Address}:-%{Packet-Src-IPv6-Address}}/post-proxy-detail-%Y%m%d" header = "%t" permissions = 384 locking = no escape_filenames = no log_packet_header = no } # Loaded module rlm_dhcp # Loading module "dhcp" from file /etc/raddb/mods-enabled/dhcp # Loaded module rlm_digest # Loading module "digest" from file /etc/raddb/mods-enabled/digest # Loaded module rlm_dynamic_clients # Loading module "dynamic_clients" from file /etc/raddb/mods-enabled/dynamic_clients # Loaded module rlm_eap # Loading module "eap" from file /etc/raddb/mods-enabled/eap eap { default_eap_type = "md5" timer_expire = 60 ignore_unknown_eap_types = no cisco_accounting_username_bug = no max_sessions = 16384 } # Loaded module rlm_exec # Loading module "echo" from file /etc/raddb/mods-enabled/echo exec echo { wait = yes program = "/bin/echo %{User-Name}" input_pairs = "request" output_pairs = "reply" shell_escape = yes } # Loading module "exec" from file /etc/raddb/mods-enabled/exec exec { wait = no input_pairs = "request" shell_escape = yes timeout = 10 } # Loaded module rlm_expiration # Loading module "expiration" from file /etc/raddb/mods-enabled/expiration # Loaded module rlm_expr # Loading module "expr" from file /etc/raddb/mods-enabled/expr expr { safe_characters = "@abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.-_: /äéöüàâæçèéêëîïôœùûüaÿÄÉÖÜßÀÂÆÇÈÉÊËÎÏÔŒÙÛÜŸ" } # Loaded module rlm_files # Loading module "files" from file /etc/raddb/mods-enabled/files files { filename = "/etc/raddb/mods-config/files/authorize" acctusersfile = "/etc/raddb/mods-config/files/accounting" preproxy_usersfile = "/etc/raddb/mods-config/files/pre-proxy" } # Loaded module rlm_linelog # Loading module "linelog" from file /etc/raddb/mods-enabled/linelog linelog { filename = "/var/log/radius/linelog" escape_filenames = no syslog_severity = "info" permissions = 384 format = "This is a log message for %{User-Name}" reference = "messages.%{%{reply:Packet-Type}:-default}" } # Loading module "log_accounting" from file /etc/raddb/mods-enabled/linelog linelog log_accounting { filename = "/var/log/radius/linelog-accounting" escape_filenames = no syslog_severity = "info" permissions = 384 format = "" reference = "Accounting-Request.%{%{Acct-Status-Type}:-unknown}" } # Loaded module rlm_logintime # Loading module "logintime" from file /etc/raddb/mods-enabled/logintime logintime { minimum_timeout = 60 } # Loaded module rlm_mschap # Loading module "mschap" from file /etc/raddb/mods-enabled/mschap mschap { use_mppe = yes require_encryption = no require_strong = no with_ntdomain_hack = yes passchange { } allow_retry = yes winbind_retry_with_normalised_username = no } # Loading module "ntlm_auth" from file /etc/raddb/mods-enabled/ntlm_auth exec ntlm_auth { wait = yes program = "/path/to/ntlm_auth --request-nt-key --domain=MYDOMAIN --username=%{mschap:User-Name} --password=%{User-Password}" shell_escape = yes } # Loaded module rlm_pap # Loading module "pap" from file /etc/raddb/mods-enabled/pap pap { normalise = yes } # Loaded module rlm_passwd # Loading module "etc_passwd" from file /etc/raddb/mods-enabled/passwd passwd etc_passwd { filename = "/etc/passwd" format = "*User-Name:Crypt-Password:" delimiter = ":" ignore_nislike = no ignore_empty = yes allow_multiple_keys = no hash_size = 100 } # Loaded module rlm_preprocess # Loading module "preprocess" from file /etc/raddb/mods-enabled/preprocess preprocess { huntgroups = "/etc/raddb/mods-config/preprocess/huntgroups" hints = "/etc/raddb/mods-config/preprocess/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 } # Loaded module rlm_radutmp # Loading module "radutmp" from file /etc/raddb/mods-enabled/radutmp radutmp { filename = "/var/log/radius/radutmp" username = "%{User-Name}" case_sensitive = yes check_with_nas = yes permissions = 384 caller_id = yes } # Loaded module rlm_realm # Loading module "IPASS" from file /etc/raddb/mods-enabled/realm realm IPASS { format = "prefix" delimiter = "/" ignore_default = no ignore_null = no } # Loading module "suffix" from file /etc/raddb/mods-enabled/realm realm suffix { format = "suffix" delimiter = "@" ignore_default = no ignore_null = no } # Loading module "realmpercent" from file /etc/raddb/mods-enabled/realm realm realmpercent { format = "suffix" delimiter = "%" ignore_default = no ignore_null = no } # Loading module "ntdomain" from file /etc/raddb/mods-enabled/realm realm ntdomain { format = "prefix" delimiter = "\\" ignore_default = no ignore_null = no } # Loaded module rlm_replicate # Loading module "replicate" from file /etc/raddb/mods-enabled/replicate # Loaded module rlm_soh # Loading module "soh" from file /etc/raddb/mods-enabled/soh soh { dhcp = yes } # Loading module "sradutmp" from file /etc/raddb/mods-enabled/sradutmp radutmp sradutmp { filename = "/var/log/radius/sradutmp" username = "%{User-Name}" case_sensitive = yes check_with_nas = yes permissions = 420 caller_id = no } # Loaded module rlm_unix # Loading module "unix" from file /etc/raddb/mods-enabled/unix unix { radwtmp = "/var/log/radius/radwtmp" } Creating attribute Unix-Group # Loaded module rlm_unpack # Loading module "unpack" from file /etc/raddb/mods-enabled/unpack # Loaded module rlm_utf8 # Loading module "utf8" from file /etc/raddb/mods-enabled/utf8 # Loaded module rlm_ldap # Loading module "ldap" from file /etc/raddb/mods-enabled/ldap ldap { server = "10.100.0.10" identity = "SRV-LDAPS-GEMALTO" password = <<< secret >>> sasl { } user { scope = "sub" access_positive = yes sasl { } } group { scope = "sub" name_attribute = "cn" cacheable_name = no cacheable_dn = no } client { scope = "sub" base_dn = "" } profile { } options { ldap_debug = 0 chase_referrals = yes rebind = yes net_timeout = 10 res_timeout = 20 srv_timelimit = 20 idle = 60 probes = 3 interval = 30 } tls { start_tls = no } } Creating attribute LDAP-Group instantiate { } # Instantiating module "reject" from file /etc/raddb/mods-enabled/always # Instantiating module "fail" from file /etc/raddb/mods-enabled/always # Instantiating module "ok" from file /etc/raddb/mods-enabled/always # Instantiating module "handled" from file /etc/raddb/mods-enabled/always # Instantiating module "invalid" from file /etc/raddb/mods-enabled/always # Instantiating module "userlock" from file /etc/raddb/mods-enabled/always # Instantiating module "notfound" from file /etc/raddb/mods-enabled/always # Instantiating module "noop" from file /etc/raddb/mods-enabled/always # Instantiating module "updated" from file /etc/raddb/mods-enabled/always # Instantiating module "attr_filter.post-proxy" from file /etc/raddb/mods-enabled/attr_filter reading pairlist file /etc/raddb/mods-config/attr_filter/post-proxy # Instantiating module "attr_filter.pre-proxy" from file /etc/raddb/mods-enabled/attr_filter reading pairlist file /etc/raddb/mods-config/attr_filter/pre-proxy # Instantiating module "attr_filter.access_reject" from file /etc/raddb/mods-enabled/attr_filter reading pairlist file /etc/raddb/mods-config/attr_filter/access_reject [/etc/raddb/mods-config/attr_filter/access_reject]:11 Check item "FreeRADIUS-Response-Delay" found in filter list for realm "DEFAULT". [/etc/raddb/mods-config/attr_filter/access_reject]:11 Check item "FreeRADIUS-Response-Delay-USec" found in filter list for realm "DEFAULT". # Instantiating module "attr_filter.access_challenge" from file /etc/raddb/mods-enabled/attr_filter reading pairlist file /etc/raddb/mods-config/attr_filter/access_challenge # Instantiating module "attr_filter.accounting_response" from file /etc/raddb/mods-enabled/attr_filter reading pairlist file /etc/raddb/mods-config/attr_filter/accounting_response # Instantiating module "cache_eap" from file /etc/raddb/mods-enabled/cache_eap rlm_cache (cache_eap): Driver rlm_cache_rbtree (module rlm_cache_rbtree) loaded and linked # Instantiating module "detail" from file /etc/raddb/mods-enabled/detail # Instantiating module "auth_log" from file /etc/raddb/mods-enabled/detail.log rlm_detail (auth_log): 'User-Password' suppressed, will not appear in detail output # Instantiating module "reply_log" from file /etc/raddb/mods-enabled/detail.log # Instantiating module "pre_proxy_log" from file /etc/raddb/mods-enabled/detail.log # Instantiating module "post_proxy_log" from file /etc/raddb/mods-enabled/detail.log # Instantiating module "eap" from file /etc/raddb/mods-enabled/eap # Linked to sub-module rlm_eap_md5 # Linked to sub-module rlm_eap_leap # Linked to sub-module rlm_eap_gtc gtc { challenge = "Password: " auth_type = "PAP" } # Linked to sub-module rlm_eap_tls tls { tls = "tls-common" } tls-config tls-common { verify_depth = 0 ca_path = "/etc/raddb/certs" 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 = <<< secret >>> dh_file = "/etc/raddb/certs/dh" fragment_size = 1024 include_length = yes auto_chain = yes check_crl = no check_all_crl = no cipher_list = "DEFAULT" cipher_server_preference = no ecdh_curve = "prime256v1" cache { enable = no lifetime = 24 max_entries = 255 } verify { skip_if_ocsp_ok = no } ocsp { enable = no override_cert_url = yes url = "http://127.0.0.1/ocsp/" use_nonce = yes timeout = 0 softfail = no } } # Linked to sub-module rlm_eap_ttls ttls { tls = "tls-common" default_eap_type = "md5" copy_request_to_tunnel = no use_tunneled_reply = no virtual_server = "inner-tunnel" include_length = yes require_client_cert = no } tls: Using cached TLS configuration from previous invocation # Linked to sub-module rlm_eap_peap peap { tls = "tls-common" default_eap_type = "mschapv2" copy_request_to_tunnel = no use_tunneled_reply = no proxy_tunneled_request_as_eap = yes virtual_server = "inner-tunnel" soh = no require_client_cert = no } tls: Using cached TLS configuration from previous invocation # Linked to sub-module rlm_eap_mschapv2 mschapv2 { with_ntdomain_hack = no send_error = no } # Instantiating module "expiration" from file /etc/raddb/mods-enabled/expiration # Instantiating module "files" from file /etc/raddb/mods-enabled/files reading pairlist file /etc/raddb/mods-config/files/authorize reading pairlist file /etc/raddb/mods-config/files/accounting reading pairlist file /etc/raddb/mods-config/files/pre-proxy # Instantiating module "linelog" from file /etc/raddb/mods-enabled/linelog # Instantiating module "log_accounting" from file /etc/raddb/mods-enabled/linelog # Instantiating module "logintime" from file /etc/raddb/mods-enabled/logintime # Instantiating module "mschap" from file /etc/raddb/mods-enabled/mschap rlm_mschap (mschap): using internal authentication # Instantiating module "pap" from file /etc/raddb/mods-enabled/pap # Instantiating module "etc_passwd" from file /etc/raddb/mods-enabled/passwd rlm_passwd: nfields: 3 keyfield 0(User-Name) listable: no # Instantiating module "preprocess" from file /etc/raddb/mods-enabled/preprocess reading pairlist file /etc/raddb/mods-config/preprocess/huntgroups reading pairlist file /etc/raddb/mods-config/preprocess/hints # Instantiating module "IPASS" from file /etc/raddb/mods-enabled/realm # Instantiating module "suffix" from file /etc/raddb/mods-enabled/realm # Instantiating module "realmpercent" from file /etc/raddb/mods-enabled/realm # Instantiating module "ntdomain" from file /etc/raddb/mods-enabled/realm # Instantiating module "ldap" from file /etc/raddb/mods-enabled/ldap rlm_ldap: libldap vendor: OpenLDAP, version: 20444 rlm_ldap (ldap): Couldn't find configuration for accounting, will return NOOP for calls from this section rlm_ldap (ldap): Couldn't find configuration for post-auth, will return NOOP for calls from this section rlm_ldap (ldap): Initialising connection pool pool { start = 5 min = 5 max = 10 spare = 3 uses = 0 lifetime = 0 cleanup_interval = 30 idle_timeout = 60 retry_delay = 1 spread = no } rlm_ldap (ldap): Opening additional connection (0), 1 of 10 pending slots used rlm_ldap (ldap): Connecting to ldap://10.100.0.10:389 rlm_ldap (ldap): Waiting for bind result... rlm_ldap (ldap): Bind successful rlm_ldap (ldap): Opening additional connection (1), 1 of 9 pending slots used rlm_ldap (ldap): Connecting to ldap://10.100.0.10:389 rlm_ldap (ldap): Waiting for bind result... rlm_ldap (ldap): Bind successful rlm_ldap (ldap): Opening additional connection (2), 1 of 8 pending slots used rlm_ldap (ldap): Connecting to ldap://10.100.0.10:389 rlm_ldap (ldap): Waiting for bind result... rlm_ldap (ldap): Bind successful rlm_ldap (ldap): Opening additional connection (3), 1 of 7 pending slots used rlm_ldap (ldap): Connecting to ldap://10.100.0.10:389 rlm_ldap (ldap): Waiting for bind result... rlm_ldap (ldap): Bind successful rlm_ldap (ldap): Opening additional connection (4), 1 of 6 pending slots used rlm_ldap (ldap): Connecting to ldap://10.100.0.10:389 rlm_ldap (ldap): Waiting for bind result... rlm_ldap (ldap): Bind successful } # modules radiusd: #### Loading Virtual Servers #### server { # from file /etc/raddb/radiusd.conf } # server server default { # from file /etc/raddb/sites-enabled/default # Loading authenticate {...} # Loading authorize {...} Ignoring "sql" (see raddb/mods-available/README.rst) # Loading preacct {...} # Loading accounting {...} # Loading post-proxy {...} # Loading post-auth {...} } # server default server inner-tunnel { # from file /etc/raddb/sites-enabled/inner-tunnel # Loading authenticate {...} # Loading authorize {...} # Loading session {...} # Loading post-proxy {...} # Loading post-auth {...} # Skipping contents of 'if' as it is always 'false' -- /etc/raddb/sites-enabled/inner-tunnel:330 } # server inner-tunnel radiusd: #### Opening IP addresses and Ports #### listen { type = "auth" ipaddr = * port = 0 limit { max_connections = 16 lifetime = 0 idle_timeout = 30 } } listen { type = "acct" ipaddr = * port = 0 limit { max_connections = 16 lifetime = 0 idle_timeout = 30 } } listen { type = "auth" ipaddr = 127.0.0.1 port = 18120 } Listening on auth address * port 1812 bound to server default Listening on acct address * port 1813 bound to server default Listening on auth address 127.0.0.1 port 18120 bound to server inner-tunnel Listening on proxy address * port 53500 Ready to process requests (0) Received Access-Request Id 161 from 127.0.0.1:53117 to 127.0.0.1:1812 length 85 (0) User-Name = "mathias.sundman" (0) User-Password = "myadpassword" (0) NAS-IP-Address = 172.16.8.111 (0) NAS-Port = 0 (0) Message-Authenticator = 0xba542c1bc308cf31d91ebb1cd7843f1d (0) # Executing section authorize from file /etc/raddb/sites-enabled/default (0) authorize { (0) policy filter_username { (0) if (&User-Name) { (0) if (&User-Name) -> TRUE (0) if (&User-Name) { (0) if (&User-Name =~ / /) { (0) if (&User-Name =~ / /) -> FALSE (0) if (&User-Name =~ /@[^@]*@/ ) { (0) if (&User-Name =~ /@[^@]*@/ ) -> FALSE (0) if (&User-Name =~ /\.\./ ) { (0) if (&User-Name =~ /\.\./ ) -> FALSE (0) if ((&User-Name =~ /@/) && (&User-Name !~ /@(.+)\.(.+)$/)) { (0) if ((&User-Name =~ /@/) && (&User-Name !~ /@(.+)\.(.+)$/)) -> FALSE (0) if (&User-Name =~ /\.$/) { (0) if (&User-Name =~ /\.$/) -> FALSE (0) if (&User-Name =~ /@\./) { (0) if (&User-Name =~ /@\./) -> FALSE (0) } # if (&User-Name) = notfound (0) } # policy filter_username = notfound (0) [preprocess] = ok (0) [chap] = noop (0) [mschap] = noop (0) [digest] = noop (0) suffix: Checking for suffix after "@" (0) suffix: No '@' in User-Name = "mathias.sundman", looking up realm NULL (0) suffix: Found realm "NULL" (0) suffix: Adding Stripped-User-Name = "mathias.sundman" (0) suffix: Adding Realm = "NULL" (0) suffix: Proxying request from user mathias.sundman to realm NULL (0) suffix: Preparing to proxy authentication request to realm "NULL" (0) [suffix] = updated (0) eap: No EAP-Message, not doing EAP (0) [eap] = noop (0) files: users: Matched entry DEFAULT at line 67 (0) [files] = ok rlm_ldap (ldap): Reserved connection (0) (0) ldap: EXPAND (samaccountname=%{%{Stripped-User-Name}:-%{User-Name}}) (0) ldap: --> (samaccountname=mathias.sundman) (0) ldap: Performing search in "dc=int,dc=it-total,dc=local" with filter "(samaccountname=mathias.sundman)", scope "sub" (0) ldap: Waiting for search result... rlm_ldap (ldap): Rebinding to URL ldap://DomainDnsZones.int.it-total.local/DC=DomainDnsZones,DC=int,DC=it-total,DC=local rlm_ldap (ldap): Waiting for bind result... rlm_ldap (ldap): Bind successful (0) ldap: User object found at DN "CN=Mathias Sundman,OU=Users,OU=IT-Total,DC=int,DC=it-total,DC=local" rlm_ldap (ldap): Deleting connection (0) Need 1 more connections to reach min connections (5) rlm_ldap (ldap): Opening additional connection (5), 1 of 6 pending slots used rlm_ldap (ldap): Connecting to ldap://10.100.0.10:389 rlm_ldap (ldap): Waiting for bind result... rlm_ldap (ldap): Bind successful (0) [ldap] = ok (0) [expiration] = noop (0) [logintime] = noop (0) [pap] = noop (0) } # authorize = updated (0) Starting proxy to home server 172.16.8.107 port 1812 (0) Proxying request to home server 172.16.8.107 port 1812 timeout 14.000000 (0) Sent Access-Request Id 150 from 0.0.0.0:53500 to 172.16.8.107:1812 length 96 (0) User-Name = "mathias.sundman" (0) User-Password = "myadpassword" (0) NAS-IP-Address = 172.16.8.111 (0) NAS-Port = 0 (0) Message-Authenticator = 0xba542c1bc308cf31d91ebb1cd7843f1d (0) Event-Timestamp = "Dec 27 2017 15:59:56 CET" (0) Proxy-State = 0x313631 Waking up in 0.3 seconds. (0) Expecting proxy response no later than 13.678859 seconds from now Waking up in 13.6 seconds. (0) Clearing existing &reply: attributes (0) Received Access-Reject Id 150 from 172.16.8.107:1812 to 172.16.8.111:53500 length 25 (0) Proxy-State = 0x313631 (0) # Executing section post-proxy from file /etc/raddb/sites-enabled/default (0) post-proxy { (0) eap: No pre-existing handler found (0) [eap] = noop (0) } # post-proxy = noop (0) Using Post-Auth-Type Reject (0) # Executing group from file /etc/raddb/sites-enabled/default (0) Post-Auth-Type REJECT { (0) attr_filter.access_reject: EXPAND %{User-Name} (0) attr_filter.access_reject: --> mathias.sundman (0) attr_filter.access_reject: Matched entry DEFAULT at line 11 (0) [attr_filter.access_reject] = updated (0) [eap] = noop (0) policy remove_reply_message_if_eap { (0) if (&reply:EAP-Message && &reply:Reply-Message) { (0) if (&reply:EAP-Message && &reply:Reply-Message) -> FALSE (0) else { (0) [noop] = noop (0) } # else = noop (0) } # policy remove_reply_message_if_eap = noop (0) } # Post-Auth-Type REJECT = updated (0) Delaying response for 1.000000 seconds Waking up in 0.3 seconds. Waking up in 0.6 seconds. (0) Sending delayed response (0) Sent Access-Reject Id 161 from 127.0.0.1:1812 to 127.0.0.1:53117 length 20 Waking up in 3.9 seconds. (0) Cleaning up request packet ID 161 with timestamp +40 Ready to process requests
On Dec 27, 2017, at 10:09 AM, Mathias Sundman <mathias@nilings.se> wrote:
However, he now wants to first authenticate the user with username/AD-password via LDAP against their AD, and if successful, the user should be prompted for the OTP code as a second step. This is currently not possible with the Gemalto SAS solution, so I’m therefor trying to deploy a FreeRADIUS (v3.0.13 on CentOS7) server in between and have FR perform the AD auth, return an Access-Challenge and then proxy the second Access-Request with the OTP code to Gemalto RADIUS.
That's possible, but it takes a bit of tweaking. But it requires an understanding of how Access-Challenge works.
I’ve successfully managed to independently configure FR with the LDAP module to authenticate the username/password against their AD, or configure it as a proxy to send the requests to Gemalto, but I can’t really figure out how to chain these two auth methods together. After I enabled proxying of NULL realm, the first auth request is sent straight on to Gemalto.
Then configure it to not do that... i.e. for the first packet, return Access-Challenge with a State and a Reply-Message (as a prompt to the user). Then, the subsequent Access-Request should contain that same State attribute. You can then check for the existence of State, and proxy only when it exists. Basically what you want is this. You'll have to glue the pieces together yourself. authorize { ... if (!State) { ... set up for AD authentication ... } else { ... set up for proxy to Gemalto ... } ... } authenticate { ... Auth-Type LDAP { ldap if (ok) { update reply { State = &User-Name # should be random, but this should be fine.. Reply-Message = "Please enter OTP } update control { Response-Packet-Type := Access-Challenge } } } ... } That should give you the right direction. Alan DeKok.
On 27 Dec 2017, at 16:51, Alan DeKok <aland@deployingradius.com> wrote:
On Dec 27, 2017, at 10:09 AM, Mathias Sundman <mathias@nilings.se> wrote:
However, he now wants to first authenticate the user with username/AD-password via LDAP against their AD, and if successful, the user should be prompted for the OTP code as a second step. This is currently not possible with the Gemalto SAS solution, so I’m therefor trying to deploy a FreeRADIUS (v3.0.13 on CentOS7) server in between and have FR perform the AD auth, return an Access-Challenge and then proxy the second Access-Request with the OTP code to Gemalto RADIUS.
That's possible, but it takes a bit of tweaking. But it requires an understanding of how Access-Challenge works.
I’ve successfully managed to independently configure FR with the LDAP module to authenticate the username/password against their AD, or configure it as a proxy to send the requests to Gemalto, but I can’t really figure out how to chain these two auth methods together. After I enabled proxying of NULL realm, the first auth request is sent straight on to Gemalto.
Then configure it to not do that...
i.e. for the first packet, return Access-Challenge with a State and a Reply-Message (as a prompt to the user). Then, the subsequent Access-Request should contain that same State attribute. You can then check for the existence of State, and proxy only when it exists.
Basically what you want is this. You'll have to glue the pieces together yourself.
authorize { ...
if (!State) { ... set up for AD authentication ... } else { ... set up for proxy to Gemalto ... } ... }
authenticate { ... Auth-Type LDAP { ldap if (ok) { update reply { State = &User-Name # should be random, but this should be fine.. Reply-Message = "Please enter OTP }
update control { Response-Packet-Type := Access-Challenge } } } ... }
That should give you the right direction.
Thanks a lot for your quick reply. With your help I now got it working! I also found the “challenge” example site which pretty much did what I wanted. This is the working config I ended up with: authorize { if (!State) { update control { Auth-Type := Step1 } } else { # Enable suffix to set realm and proxy the request. suffix update control { Auth-Type := Step2 } } } authenticate { Auth-Type Step1 { ldap update session-state { Tmp-Integer-0 := "%{randstr:n}" } update reply { Reply-Message := "Please enter OTP" } challenge } Auth-Type Step2 { pap } } I also had to enable attr_filter.pre-proxy in the pre-proxy section to filter out the State and Reply-Message attributes before the second Access-Request was proxied to Gemalto, otherwise the request was rejected as that server did not expect a request with a state. - Mathias
On 28 Dec 2017, at 03:47, Mathias Sundman <mathias@nilings.se> wrote:
On 27 Dec 2017, at 16:51, Alan DeKok <aland@deployingradius.com> wrote:
On Dec 27, 2017, at 10:09 AM, Mathias Sundman <mathias@nilings.se> wrote:
However, he now wants to first authenticate the user with username/AD-password via LDAP against their AD, and if successful, the user should be prompted for the OTP code as a second step. This is currently not possible with the Gemalto SAS solution, so I’m therefor trying to deploy a FreeRADIUS (v3.0.13 on CentOS7) server in between and have FR perform the AD auth, return an Access-Challenge and then proxy the second Access-Request with the OTP code to Gemalto RADIUS.
That's possible, but it takes a bit of tweaking. But it requires an understanding of how Access-Challenge works.
I also had to enable attr_filter.pre-proxy in the pre-proxy section to filter out the State and Reply-Message attributes before the second Access-Request was proxied to Gemalto, otherwise the request was rejected as that server did not expect a request with a state.
Just in case someone else is searching for the same problem, I’ve cleaned up the logic to make it work with multiple virtual servers where I manually force proxying to a specific Realm, instead of relying on the suffix/realm module to enable the proxying. This is now what I ended up with: authorize { if (!State) { ldap if (ok) { update control { Auth-Type := LDAP } } else { reject } } else { update control { Proxy-To-Realm := "test" } } } authenticate { Auth-Type LDAP { ldap if (ok) { update session-state { Tmp-Integer-0 := "%{randstr:n}" } update reply { Reply-Message := "Please enter OTP" } challenge } } } pre-proxy { attr_filter.pre-proxy } If you believe the logic is still flawed in any way, please let me know, otherwise I thank you again Alan for the quick reply and consider the problem solved.
On Dec 30, 2017, at 4:41 AM, Mathias Sundman <mathias@nilings.se> wrote:
Just in case someone else is searching for the same problem, I’ve cleaned up the logic to make it work with multiple virtual servers where I manually force proxying to a specific Realm, instead of relying on the suffix/realm module to enable the proxying. This is now what I ended up with:
Updating a page on the Wiki would be nice, too. :)
authorize { if (!State) { ldap if (ok) { update control { Auth-Type := LDAP }
That shouldn't be necessary. i.e. if you have a standards-compliant LDAP server, it can return the "known good" password, and the PAP module can check the password.
authenticate { Auth-Type LDAP {
It's probably best to re-name this to something descriptive, like "two-factor"
ldap
This should probably be the "pap" module.
if (ok) { update session-state { Tmp-Integer-0 := "%{randstr:n}" }
Why are you updating the session-state here? That's not the State attribute. You should be updating the state attribute in the reply.
update reply { Reply-Message := "Please enter OTP" } challenge } } }
pre-proxy { attr_filter.pre-proxy }
If you believe the logic is still flawed in any way, please let me know, otherwise I thank you again Alan for the quick reply and consider the problem solved.
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On 30 Dec 2017, at 15:04, Alan DeKok <aland@deployingradius.com> wrote:
On Dec 30, 2017, at 4:41 AM, Mathias Sundman <mathias@nilings.se> wrote:
Just in case someone else is searching for the same problem, I’ve cleaned up the logic to make it work with multiple virtual servers where I manually force proxying to a specific Realm, instead of relying on the suffix/realm module to enable the proxying. This is now what I ended up with:
Updating a page on the Wiki would be nice, too. :)
I have a look at that when we’re happy with the logic :) I don’t wanna make a wiki page with something that “just works”, but it plain wrong.
authorize { if (!State) { ldap if (ok) { update control { Auth-Type := LDAP }
That shouldn't be necessary. i.e. if you have a standards-compliant LDAP server, it can return the "known good" password, and the PAP module can check the password.
My LDAP source is Active Directory, so I don’t think the LDAP module can get the "known good” password. Instead I need to force authentication by trying to re-bind as the authenticating user.
ldap
This should probably be the "pap" module.
See above. As I wish to authenticate by having the ldap module rebinding, I think it needs to be “ldap” - right? I’m aware it’s generally recommended to use Samba and ntlm_auth instead for AD authentication, but as we provide a 2FA service to external customers and we don’t manage their AD, it’s cleaner to just request an LDAP service account in their AD to perform the authentication.
if (ok) { update session-state { Tmp-Integer-0 := "%{randstr:n}" }
Why are you updating the session-state here? That's not the State attribute. You should be updating the state attribute in the reply.
I got that from the “challenge” site example, and it seems to trigger a random State to be created. Without it, no state is created. I guess it’s a dirty work-around instead of manually setting the State attribute.
update reply { Reply-Message := "Please enter OTP" } challenge } } }
pre-proxy { attr_filter.pre-proxy }
If you believe the logic is still flawed in any way, please let me know, otherwise I thank you again Alan for the quick reply and consider the problem solved.
On 30 Dec 2017, at 15:04, Alan DeKok <aland@deployingradius.com> wrote:
On Dec 30, 2017, at 4:41 AM, Mathias Sundman <mathias@nilings.se> wrote:
Just in case someone else is searching for the same problem, I’ve cleaned up the logic to make it work with multiple virtual servers where I manually force proxying to a specific Realm, instead of relying on the suffix/realm module to enable the proxying. This is now what I ended up with:
Updating a page on the Wiki would be nice, too. :)
I’ve now created a HowTo in the wiki: http://wiki.freeradius.org/guide/2FA-Active-Directory-plus-Proxy <http://wiki.freeradius.org/guide/2FA-Active-Directory-plus-Proxy> Feedback is of course welcome :) - Mathias
On Jan 1, 2018, at 2:34 PM, Mathias Sundman <mathias@nilings.se> wrote:
http://wiki.freeradius.org/guide/2FA-Active-Directory-plus-Proxy <http://wiki.freeradius.org/guide/2FA-Active-Directory-plus-Proxy>
Feedback is of course welcome :)
The one thing is that the module attr_filter.pre-proxy does *not* remove State from the proxied request. Or at least... it shouldn't in the default configuration. If the server is proxying EAP packets as-is, it MUST proxy State to the home server. Alan DeKok.
On 1 Jan 2018, at 20:45, Alan DeKok <aland@deployingradius.com> wrote:
On Jan 1, 2018, at 2:34 PM, Mathias Sundman <mathias@nilings.se> wrote:
http://wiki.freeradius.org/guide/2FA-Active-Directory-plus-Proxy <http://wiki.freeradius.org/guide/2FA-Active-Directory-plus-Proxy>
Feedback is of course welcome :)
The one thing is that the module attr_filter.pre-proxy does *not* remove State from the proxied request. Or at least... it shouldn't in the default configuration.
Good catch - I forgot I had also modified the attr_filter/pre-proxy configuration file. Wiki updated now.
participants (2)
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Alan DeKok -
Mathias Sundman