November 2023 - Freeradius-Users - lists.freeradius.org

Freeradius is crashing while proxying a request.
by Amit P 25 Nov '23

25 Nov '23

Hi, Freeradius is crashing with signal 6 when no live homeserver is available, while proxying a request. I have only one home server in my pool and when it is marked as dead and a new access-request is received freeradius is crashed. Logs: Sat Nov 25 08:52:27 2023 : Debug: (1) No proxy response, giving up on request and marking it done Sat Nov 25 08:52:27 2023 : Proxy: Marking home server 20.0.0.4 port 1812 as zombie (it has not responded in 30.000000 seconds). Sat Nov 25 08:52:27 2023 : ERROR: (1) Failing proxied request for user "00:50:56:96:ff:32", due to lack of any response from home server 20.0.0.4 port 1812 Sat Nov 25 08:52:27 2023 : Debug: (1) Clearing existing &reply: attributes Sat Nov 25 08:52:27 2023 : Debug: (1) Found Post-Proxy-Type Fail-Authentication Sat Nov 25 08:52:27 2023 : Debug: (1) server default { Sat Nov 25 08:52:27 2023 : Debug: (1) Post-Proxy-Type sub-section not found. Ignoring. Sat Nov 25 08:52:27 2023 : Debug: (1) # Executing group from file /etc/raddb/sites-enabled/default Sat Nov 25 08:52:27 2023 : Debug: (1) } Sat Nov 25 08:52:27 2023 : Auth: (1) Login incorrect (Home Server failed to respond): [00:50:56:96:ff:32] (from client 20.0.0.1 port 2 cli 00-50-56-96-FF-32) Sat Nov 25 08:52:27 2023 : Debug: (1) There was no response configured: rejecting request Sat Nov 25 08:52:27 2023 : Debug: (1) Using Post-Auth-Type Reject Sat Nov 25 08:52:27 2023 : Debug: (1) # Executing group from file /etc/raddb/sites-enabled/default Sat Nov 25 08:52:27 2023 : Debug: (1) Post-Auth-Type REJECT { Sat Nov 25 08:52:27 2023 : Debug: (1) modsingle[post-auth]: calling attr_filter.access_reject (rlm_attr_filter) Sat Nov 25 08:52:27 2023 : Debug: %{User-Name} .... Sat Nov 25 08:52:57 2023 : Debug: PING: Zombie period is over for home server remoteradius2 Sat Nov 25 08:52:57 2023 : Proxy: Marking home server 20.0.0.4 port 1812 as dead. Sat Nov 25 08:52:57 2023 : Debug: PING: Reviving home server remoteradius2 in 300 seconds Sat Nov 25 08:52:57 2023 : Debug: Waking up in 2.7 seconds. .... .... at Nov 25 08:53:56 2023 : Debug: (2) Received Access-Request Id 5 from 20.0.0.1:50918 to 20.0.0.2:1812 length 169 Sat Nov 25 08:53:56 2023 : Debug: (2) User-Name = "00:50:56:96:ff:32" Sat Nov 25 08:53:56 2023 : Debug: (2) Calling-Station-Id = "00-50-56-96-FF-32" .... Sat Nov 25 08:53:56 2023 : Debug: (2) } # authorize = updated Sat Nov 25 08:53:56 2023 : Debug: Using home pool auth for realm realm2 Sat Nov 25 08:53:56 2023 : ERROR: (2) Failed to find live home server: Cancelling proxy Sat Nov 25 08:53:56 2023 : WARNING: (2) No home server selected Sat Nov 25 08:53:56 2023 : Debug: (2) Clearing existing &reply: attributes Sat Nov 25 08:53:56 2023 : Debug: (2) Found Post-Proxy-Type Fail-Authentication Sat Nov 25 08:53:56 2023 : Error: ASSERT FAILED src/main/process.c[2485]: request->home_server != NULL CAUGHT SIGNAL: Aborted Backtrace of last 12 frames: /usr/lib/libfreeradius-radius.so.0(fr_fault+0x144)[0xffff81bc0d64] /usr/lib/libfreeradius-server.so.0(rad_assert_fail+0x2c)[0xffff81c219fc] radiusd[0x42f648] radiusd[0x436490] # radiusd -v radiusd: FreeRADIUS Version 3.0.20 (git #d94c953ab), for host aarch64-cnos-linux-gnu, built on Mar 9 2018 at 12:34:56 FreeRADIUS Version 3.0.20 Thanks & Regards, Amit

2 1

Monitor the number of open EAP sessions
by Sergey Marochkin 23 Nov '23

23 Nov '23

Hi everyone! I am facing a problem when freeradius reports that the limit of open sessions has been reached. These are log entries, like "Too many open sessions. Try increasing "max_sessions" in the EAP module configuration". During the debugging, it was determined that some ios devices (ipad/iphone), for a reason unknown to me, cyclically cannot complete eap/tls authentication process. I found that these devices successfully start communicating with the NAS (send EAP-Response/Identity). But after receiving the (TLS Start)-message, they no longer send the (TLS client_hello)-message, and restart the association process with the access point and therefore open a new EAP session. If recreate a wifi connection on such a device, it will connect successfully. Until I find the root cause of this behavior, I would like to monitor the number of open sessions of the radius server. But I couldn't find a suitable way to do it. Here is what I tried: - use the "status server" tool, but there is no suitable one among its counters - use tool "control-socket" and radmin but also i didn't find suitable counter Can you help me with this question? Thanks!

2 4

LDAPS - where to start from?
by little-nemo＠virgilio.it 23 Nov '23

23 Nov '23

Hello, members. I followed the upgrading suggestion. Now working on Freeradius 3.2.1 (on Debian 11.5). I'm also using some personalized templates of the Eduroam/GARR consortium. Trying to setup LDAP filtering. To get an idea on how to do it, I read the tread "LDAP groups and how to filter" (https://lists.freeradius.org/pipermail/freeradius-users/2020-February/09743…) Is it still up to date? Is it a feasible solution? I'm still not understanding if this solution also requires the memberof/membership settings in the mods-available/ldap module. Does it? Now my main concern is the LDAPS binding, which is not working. Debug last rows: rlm_ldap (ldap): Opening additional connection (0), 1 of 32 pending slots used rlm_ldap (ldap): Connecting to ldaps://dc1.testuni.it:636 rlm_ldap (ldap): Bind with CN=reader-freeradius,OU=ServiceUsers,OU=ServicePeople,DC=testuni,DC=it to ldaps://dc1.testuni.it:636 failed: Can't contact LDAP server rlm_ldap (ldap): Opening connection failed (0) rlm_ldap (ldap): Removing connection pool /etc/freeradius/3.0/mods-enabled/ldap[8]: Instantiation failed for module "ldap" I tried to bind, manually, using the general command: ldapsearch -D ${identity} -w ${password} -H ${server} -b 'CN=user,${base_dn}' and it worked. In mods-available/ldap, at line 77, I read the suggestion: ldapsearch -D ${identity} -w ${password} -h ${server} -b 'CN=user,${base_dn}' which did not work (the "-h" parameter is not supported anymore?). I don't think that this is the exact command used by freeradius, so the cause is elsewhere, likely in my configuration files. What am I supposed to check? Do you need the full debug? Thanks in advance, Pietro

3 11

Can we re-order the authorization queries in the SQL module?
by James Fan 23 Nov '23

23 Nov '23

We have a case that needs to prioritize the group reply attributes more than the user reply attributes in the same attribute. However, I found a fixed order for the authorization queries in the source code as below. radcheck -> radreply -> radgroupcheck -> radgroupreply If I change the orders in queries.conf, the query order is not changed while authorizing. So I wonder if we can re-order the authorization queries by any configuration to make higher priority for the group reply? Thanks.

4 6

Request Authenticator value made available to a Perl module
by Brandon Miller 21 Nov '23

21 Nov '23

Hi Everyone, I am working on a Perl module that requires access to the Request Authenticator value for each Access-Request. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Code | Identifier | Length | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | | Request Authenticator <----------- I need this value passed to my Perl module | | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Attributes ... +-+-+-+-+-+-+-+-+-+-+-+-+- I combed through the docs and found the Request-Authenticator Runtime variable (https://wiki.freeradius.org/config/run_time_variables) I tried to dynamically assign this variable (%V) to a Radius-Request variable in my site definition file, but the server won't start with error: /etc/raddb/sites-enabled/myPerlSite[17]: Failed parsing expanded string: /etc/raddb/sites-enabled/myPerlSite[17]: %V /etc/raddb/sites-enabled/myPerlSite[17]: ^ Invalid variable expansion It seems this variable has been deprecated in v3. Is there any way to get at this variable in another way? I am running v3.0.13. Thanks in advance, Brandon

2 13

Issues with vendor 3375 (F5) and FreeRADIUS
by Coy Hile (BLOOMBERG/ 919 3RD A) 21 Nov '23

21 Nov '23

Good morning, We're running into issues with F5 devices and authorization against FreeRADIUS. Our network team have included the following dictionary (which is loaded via a $INCLUDE directive in /etc/raddb/dictionary): VENDOR f5 3375 BEGIN-VENDOR f5 ATTRIBUTE F5-LTM-User-Role 1 integer ATTRIBUTE F5-LTM-User-Role-Universal 2 integer # enable/disable ATTRIBUTE F5-LTM-User-Partition 3 string ATTRIBUTE F5-LTM-User-Console 4 integer # enable/disable ATTRIBUTE F5-LTM-User-Shell 5 string # supported values are disable and tmsh ATTRIBUTE F5-LTM-User-Context-1 10 integer ATTRIBUTE F5-LTM-User-Context-2 11 integer ATTRIBUTE F5-LTM-User-Info-1 12 string ATTRIBUTE F5-LTM-User-Info-2 13 string ATTRIBUTE F5-LTM-Audit-Msg 14 string # F5OS vendor-specific-attributes ATTRIBUTE F5-F5OS-UID 21 integer ATTRIBUTE F5-F5OS-GID 22 integer ATTRIBUTE F5-F5OS-HOMEDIR 23 string ATTRIBUTE F5-F5OS-SHELL 24 string ATTRIBUTE F5-F5OS-USERINFO 25 string VALUE F5-LTM-User-Role Administrator 0 VALUE F5-LTM-User-Role Resource-Admin 20 VALUE F5-LTM-User-Role User-Manager 40 VALUE F5-LTM-User-Role Auditor 80 VALUE F5-LTM-User-Role Manager 100 VALUE F5-LTM-User-Role App-Editor 300 VALUE F5-LTM-User-Role Advanced-Operator 350 VALUE F5-LTM-User-Role Operator 400 VALUE F5-LTM-User-Role Firewall-Manager 450 VALUE F5-LTM-User-Role Fraud-Protection-Manager 480 VALUE F5-LTM-User-Role Certificate-Manager 500 VALUE F5-LTM-User-Role IRule-Manager 510 VALUE F5-LTM-User-Role Guest 700 VALUE F5-LTM-User-Role Web-Application-Security-Administrator 800 VALUE F5-LTM-User-Role Web-Application-Security-Editor 810 VALUE F5-LTM-User-Role Web-Application-Security-Operation-Administrator 820 VALUE F5-LTM-User-Role Acceleration-Policy-Editor 850 VALUE F5-LTM-User-Role No-Access 900 VALUE F5-LTM-User-Role-Universal Disabled 0 VALUE F5-LTM-User-Role-Universal Enabled 1 VALUE F5-LTM-User-Console Disabled 0 VALUE F5-LTM-User-Console Enabled 1 END-VENDOR f5 Further, Shane has configured the server to return the following VSAs for a superuser: Tue Nov 14 13:51:39 2023 Packet-Type = Access-Accept F5-LTM-User-Role = Administrator F5-F5OS-GID = 9000 F5-F5OS-UID = 1001 Timestamp = 1699987899 However, tcpdump shows the following: radcas-rr-641 /root # tcpdump -i bond0 -n -vvv host 10.91.250.120 tcpdump: listening on bond0, link-type EN10MB (Ethernet), capture size 262144 bytes 13:51:39.232624 IP (tos 0x0, ttl 55, id 19394, offset 0, flags [DF], proto UDP (17), length 115) 10.91.250.120.54996 > 10.124.134.47.radius-new: [udp sum ok] RADIUS, length: 87 Access-Request (1), id: 0x1f, Authenticator: 314fd8be32430e77a584870ba696ba64 User-Name Attribute (1), length: 10, Value: sedelman 0x0000: 7365 6465 6c6d 616e User-Password Attribute (2), length: 18, Value: 0x0000: 612c f40e 6250 6c36 fd6e ca89 0853 028f NAS-IP-Address Attribute (4), length: 6, Value: 100.65.6.2 0x0000: 6441 0602 NAS-Identifier Attribute (32), length: 15, Value: password-auth 0x0000: 7061 7373 776f 7264 2d61 7574 68 NAS-Port Attribute (5), length: 6, Value: 7692 0x0000: 0000 1e0c NAS-Port-Type Attribute (61), length: 6, Value: Virtual 0x0000: 0000 0005 Service-Type Attribute (6), length: 6, Value: Authenticate Only 0x0000: 0000 0008 13:51:39.278923 IP (tos 0x0, ttl 64, id 21787, offset 0, flags [none], proto UDP (17), length 84) 10.124.134.47.radius-new > 10.91.250.120.54996: [bad udp cksum 0x95d0 -> 0x3ad8!] RADIUS, length: 56 Access-Accept (2), id: 0x1f, Authenticator: 61df1ce227ff006987a4d9f0506a2cd9 Vendor-Specific Attribute (26), length: 12, Value: Vendor: Unknown (3375) Vendor Attribute: 1, Length: 4, Value: .... 0x0000: 0000 0d2f 0106 0000 0000 Vendor-Specific Attribute (26), length: 12, Value: Vendor: Unknown (3375) Vendor Attribute: 22, Length: 4, Value: ..#( 0x0000: 0000 0d2f 1606 0000 2328 Vendor-Specific Attribute (26), length: 12, Value: Vendor: Unknown (3375) Vendor Attribute: 21, Length: 4, Value: .... 0x0000: 0000 0d2f 1506 0000 03e9 Why is the vendor showing up as "unknown (3375)" when 3375 is the vendor ID for F5? The attributes that FreeRADIUS says it's sending back actually match the vendor attributes, but they're all jumbled. -c

3 2

authorize with other variable
by Florian Traxler (mieX GmbH) 20 Nov '23

20 Nov '23

Hello! I would like to authenticate with Agent Remote ID instead of using MAC as the user name. Can this be solved with "Based on PIN Code" when creating a new user in FreeRadius. In which file can the variable be adjusted to check the agent remote ID instead of the user name and send access-accept. (0) Received Access-Request Id 42 from xxx.xxx.xxx.xxx:57848 to xxx.xxx.xxx.xxx:1812 length 202 (0) NAS-Port-Type = Ethernet (0) NAS-Port = 2207262241 (0) Calling-Station-Id = "cisco-8c94.8s77.dd97-Et0.34" (0) Called-Station-Id = "dhcp1" (0) User-Name = "8C:94:1F:34:EE:89" (0) User-Password = "" (0) Agent-Remote-Id = 0x393734302d31323434313932357c31344d7c35303530343938347c7c (0) Agent-Circuit-Id = 0x4c493732383730322d5045494c5354454930312065746820312f312f31372f31313a3334 (0) NAS-Identifier = "xxx" (0) NAS-IP-Address = xxx.xxx.xxx.xxx (0) # Executing section authorize from file /etc/freeradius/3.0/sites-enabled/default (0) authorize { Thank you for your help

1 0

TOTP module
by João Miguel Regateiro 16 Nov '23

16 Nov '23

Hello, I was testing my freeRadius server and I found out that a user can authenticate with the same TOTP multiple times within the 30 seconds period. From reading the RFC 6238 I understand that this must not be possible as the One Time Password is for one time use only. Here is my code: authorize { ldap if ((ok || updated)) { if (User-Password !~ /^(.*)([0-9]{6})$/) { reject } update request { User-Password := "%{1}" TOTP-Password := "%{2}" } # gets shared secret from ldap if ( &control:totp_teste =~ /([A-Za-z0-9]+),/ ) { update control { TOTP-Secret := "%{1}" } } totp.authenticate if (!ok) { reject } update control { Auth-Type := ldap } } } authenticate { Auth-Type ldap { ldap } } Could you please provide me some guidance on what I am doing wrong here? Thanks, Miguel

3 3

Auth with Agent Remote ID
by Florian Traxler (mieX GmbH) 16 Nov '23

16 Nov '23

Hello! I use FreeRADIUS version 3.0.20 and would like to allow the user to authenticate using "Agent Remote ID". Is there a way to supplement the configuration according to this parameter "access-accept". Thanks for the support.

2 3

set up tls configuration
by Andrei Katsuk 14 Nov '23

14 Nov '23

Hi, I want to set ca_file in the tls config section to env variable as follows: tls { ca_file = $ENV{LDAP_CERT} } and skip it if $ENV{LDAP_CERT} is empty. If it is empty FreeRADIUS shows next error: =========== Unable to check file "": No such file or directory /etc/raddb/mods-enabled/ldap[488]: Failed parsing configuration item "ca_file" ================ How can I skip it in this case? Andrei

2 1