- Freeradius-Users - lists.freeradius.org

random SIGSEGV after upgrade to 3.0.20
by Ferdinand Goldmann 03 Mar '20

03 Mar '20

Hi, we upgraded our installation to 3.0.20 last week and started experiencing random SIGSEGV crashes on both of our radius servers. Appearently this is related to our eduroam setup. After adding 'status_check = status-server' to the eduroam home_server blocks the crashes stopped. We are unsure whether this is a bug, but it is sort of puzzling. Did anybody else experience something similar? Best regards, Ferdinand -- Ferdinand Goldmann System Administrator Information Management JOHANNES KEPLER UNIVERSITY LINZ Altenberger Straße 69 Hochschulfond Building, HF9902 4040 Linz, Austria P +43 732 2468 3925 ferdinand.goldmann(a)jku.at www.jku.at/im

2 4

EAP-TLS Fragmentation Error
by freeradius＠lunchinglads.net 29 Feb '20

29 Feb '20

Hi Gang, I get the following auth failure for machines connecting wirelessly through a Cisco AP-1142N: > eap: Calling submodule eap_tls to process data > eap_tls: Continuing EAP-TLS > eap_tls: Peer indicated complete TLS record size will be 31 bytes > eap_tls: Got complete TLS record (31 bytes) > eap_tls: [eaptls verify] = length included > eap_tls: <<< recv TLS 1.2 [length 0002] > eap_tls: ERROR: TLS Alert read:fatal:access denied > eap_tls: SSL_read Error > eap_tls: ERROR: Error in fragmentation logic > eap_tls: ERROR: Failed in __FUNCTION__ (SSL_read): error:14094419:SSL routines:ssl3_read_bytes:tlsv1 alert access denied > eap_tls: ERROR: [eaptls process] = fail > eap: ERROR: Failed continuing EAP TLS (13) session. EAP sub-module failed > eap: Sending EAP Failure (code 4) ID 12 length 4 There appears to be no method to this madness. Same setup[1] at our auxiliary site and everything works fine. I don't know how to interpret this error, so looking for a root cause has so far escaped me. Some of our Windows 10 workstations connect without any problems, some won't. The only obvious difference between those two locations is the model of Cisco WAP involved. Could this be an authenticator issue? Any pointers greatly appreciated! Mike [1] v.3.0.17 on Debian 10.3

4 3

Use Active Directory Group to authorize a users on Freeradius 3.0.x
by Igor Sousa 28 Feb '20

28 Feb '20

Hello everybody, I have had some problems about to authorize users based on Active Directory (Samba 4 DCs) groups. I have followed http://deployingradius.com/documents/configuration/active_directory.html to configure ntlm_auth and it works perfectly. As I need restrict access to some AD groups, I need to configure ldap module. I've alright configured ldap module, but it has been pure Openldap (uid stores username and usePassword stores password). Then, to set up ldap module to access AD ldap, I've read comments on mods-available/ldap and I have set up "server", "identity", "password" and "base_dn" on the mods-enabled/ldap. I have also set up to use the attribute stores username on AD user { ... filter = "(sAMAccountName=%{%{Stripped-User-Name}:-%{User-Name}})" ... } and group { ... filter = '(objectClass=group)' ... name_attribute = cn membership_filter = "(|(member=%{control:Ldap-UserDn})(memberUid=%{%{Stripped-User-Name}:-%{User-Name}}))" membership_attribute = 'memberOf' ... } When I have tried to run radiusd -X, it has shown a error message about bind tried to ldap server: rlm_ldap (ldap): Opening additional connection (0), 1 of 32 pending slots used rlm_ldap (ldap): Connecting to ldap://dc01.mydomain.com:389 rlm_ldap (ldap): Waiting for bind result... rlm_ldap (ldap): Bind with cn=Administrator,cn=Users,dc=mydomain,dc=com to ldap://dc01.mydomain.com:389 failed: Strong(er) authentication required rlm_ldap (ldap): Server said: BindSimple: Transport encryption required.. rlm_ldap (ldap): Opening connection failed (0) rlm_ldap (ldap): Removing connection pool /etc/raddb/mods-enabled/ldap[8]: Instantiation failed for module "ldap" I've suspected about SASL due I haven't been notify that LDAP use STARTTLS or SSL over TLS. Then I've commented identity and password and radiusd -X rlm_ldap (ldap): Opening additional connection (0), 1 of 32 pending slots used rlm_ldap (ldap): Connecting to ldap://dc01.mydomain.com:389 rlm_ldap (ldap): Starting SASL mech(s): GSSAPI SASL/GSSAPI authentication started rlm_ldap (ldap): Bind with (anonymous) to ldap://dc01.mydomain.com:389 failed: Local error rlm_ldap (ldap): Opening connection failed (0) rlm_ldap (ldap): Removing connection pool /etc/raddb/mods-enabled/ldap[8]: Instantiation failed for module "ldap" I run kinit Administrator before run the ldapsearch below and hasn't shown any ERROR. Please, can someone help me about my problem? [root@centos8 ~]# ldapsearch -LLL -h dc01.mydomain.com -b "ou=drc,dc=mydomain,dc=com" sAMAccountName SASL/GSS-SPNEGO authentication started SASL username: Administrator(a)MYDOMAIN.COM SASL SSF: 256 SASL data security layer installed. -- Igor Sousa

3 7

Simultaneous-Use problems
by Marco Miglietta 28 Feb '20

28 Feb '20

Hi, can I receive a little help ? I use authentication with users in maria-db. Where I have to make settings in order to allow a unique login ? Attribute Simultaneous-Use as check ? Thank you. Marco.

2 2

Error: Ignoring duplicate packet, LDAP performance
by uj2.hahn＠posteo.de 28 Feb '20

28 Feb '20

Hi, freeradius team! I know, this "Ignoring duplicate packet" topic has been discussed for a long time again and again. I see that in a special configuration: - FreeRADIUS Version 3.0.17 on Ubuntu - ActiveDirectory on Winserver 2012 R2 - authentication via ntlm_auth - post-auth via LDAP (group ownership etc) - 15 brand-new Cisco/Meraki-WLAN-APs in network - all Cisco/Meraki-WLAN-APs are controlled by a central web-based Meraki dashboard Everything works fine, there are no user complaints so far. BUT: The central Meraki dashboard has a built-in test function to check all managed NAS if they are able to communicate with radius server. So I have to provide an existing user/password and the dashboard triggers each NAS to check for freeradius authentication with same credentials. In this scenario I run into the "Ignoring duplicate packet" issue (see freeradius log part below) which let the Meraki dashboard reports some NAS as failing. The count of failing NASs and the failing NASs are varying . However when I disable the LDAP post-auth section everything is fine. Wed Feb 26 14:21:05 2020 : Info: rlm_ldap (ldap): Opening additional connection (17641), 1 of 30 pending slots used Wed Feb 26 14:21:05 2020 : Info: rlm_ldap (ldap): Deleting connection (17640) - Was referred to a different LDAP server Wed Feb 26 14:21:05 2020 : Info: Need 1 more connections to reach min connections (3) Wed Feb 26 14:21:05 2020 : Info: rlm_ldap (ldap): Opening additional connection (17642), 2 of 31 pending slots used Wed Feb 26 14:21:05 2020 : Error: (69437) Ignoring duplicate packet from client ZI-110 port 54766 - ID: 8 due to unfinished request in component post-auth module ldap Wed Feb 26 14:21:05 2020 : Error: (69438) Ignoring duplicate packet from client ZI-112 port 42248 - ID: 8 due to unfinished request in component post-auth module ldap Wed Feb 26 14:21:05 2020 : Info: rlm_ldap (ldap): Deleting connection (17638) - Was referred to a different LDAP server Wed Feb 26 14:21:07 2020 : Info: rlm_ldap (ldap): Opening additional connection (17643), 1 of 30 pending slots used Wed Feb 26 14:21:07 2020 : Error: (69446) Ignoring duplicate packet from client ZI-120 port 58022 - ID: 6 due to unfinished request in component authenticate module eap_peap Wed Feb 26 14:21:07 2020 : Error: (69453) Ignoring duplicate packet from client ZI-216 port 37434 - ID: 6 due to unfinished request in component authenticate module eap_peap Wed Feb 26 14:21:08 2020 : Error: (69460) Ignoring duplicate packet from client ZI-012 port 49893 - ID: 6 due to unfinished request in component authenticate module eap_peap Wed Feb 26 14:21:08 2020 : Info: rlm_ldap (ldap): Deleting connection (17642) - Was referred to a different LDAP server Wed Feb 26 14:21:08 2020 : Info: Need 1 more connections to reach min connections (3) Wed Feb 26 14:21:08 2020 : Info: rlm_ldap (ldap): Opening additional connection (17644), 1 of 30 pending slots used Wed Feb 26 14:21:08 2020 : Info: rlm_ldap (ldap): Deleting connection (17641) - Was referred to a different LDAP server Wed Feb 26 14:21:08 2020 : Info: rlm_ldap (ldap): Opening additional connection (17645), 1 of 30 pending slots used Wed Feb 26 14:21:09 2020 : Info: rlm_ldap (ldap): Deleting connection (17643) - Was referred to a different LDAP server I'm pretty sure the root cause is related to general network and/or LDAP performance. Actions I will take are: - let network admin check the network and DC/AD server performance - review my freeradius LDAP queries if they are specific enough (reducing the amount of data they generate) But I have some questions to freeradius team related to that: I have a single freeradius server and a single DC/AD server. 1) Why does freeradius open and close LDAP connections pretty often? Isn't one permanently open connection good enough? 2) What does this message mean: Info: rlm_ldap (ldap): Deleting connection (17640) - Was referred to a different LDAP server There is just one LDAP server! I started a debug session and found this matching part in debug log: (25) ldap: User object found at DN "CN=jasmin hahn,OU=Schueler,DC=moritz,DC=local" (25) ldap: EXPAND (samaccountname=%{mschap:User-Name}) (25) ldap: --> (samaccountname=jasmin-hahn) (25) ldap: Waiting for bind result... (25) ldap: Bind successful (25) ldap: Performing search in "DC=moritz,DC=local" with filter "(samaccountname=jasmin-hahn)", scope "sub" (25) ldap: Waiting for search result... rlm_ldap (ldap): Rebinding to URL ldap://ForestDnsZones.moritz.local/DC=ForestDnsZones,DC=moritz,DC=local rlm_ldap (ldap): Waiting for bind result... rlm_ldap (ldap): Rebinding to URL ldap://DomainDnsZones.moritz.local/DC=DomainDnsZones,DC=moritz,DC=local rlm_ldap (ldap): Waiting for bind result... rlm_ldap (ldap): Rebinding to URL ldap://moritz.local/CN=Configuration,DC=moritz,DC=local rlm_ldap (ldap): Waiting for bind result... rlm_ldap (ldap): Bind successful rlm_ldap (ldap): Bind successful rlm_ldap (ldap): Bind successful (25) ldap: Adding cacheable group object memberships (25) ldap: &control:LDAP-Group += "OU=Schueler" (25) ldap: Processing user attributes (25) ldap: WARNING: No "known good" password added. Ensure the admin user has permission to read the password attribute (25) ldap: WARNING: PAP authentication will *NOT* work with Active Directory (if that is what you were trying to configure) *rlm_ldap (ldap): Deleting connection (3) - Was referred to a different LDAP server* (I'm aware I cannot get passwd from AD, that's why I use ntlm_auth. This is not the topic I want to ask here. Or is it related??) 3) In my special case (self test by Meraki dashboard) I check same user from all NASs within a short timeframe. So freeradius should provide always same feedback. Could the freeradius flow be shortened by a cache mechanism? Thanks a lot! Uwe

2 5

Ubuntu patch FYI
by Danner, Mearl 27 Feb '20

27 Feb '20

Just got this from a wireless lan list: "We has been struggling with a recent patch from Ubuntu that broke encrypted connections between some of our internal servers. Long story short: Ubuntu now uses GNU-TLS and the latest security patch has removed support for SHA-1. Error messages in Ubuntu or in LDAP were not explicit enough to make it obvious. Some of you may face this issue between RADIUS and LDAP (still used quite a bit for 802.1X). This issue will most likely affect internally issued infrastructure certificates! Fix: Do not patch GNU-TLS (is this a good idea?) or recreate your ROOT CA to support SHA-2 family"

3 2

rlm_cache xlat
by Станислав Семенов 27 Feb '20

27 Feb '20

Hi Why not working next config? Thanks. cache cache_ldap { driver = "rlm_cache_rbtree" key = "%{User-Name}" ttl = 300 add_stats = no update { &reply:Cisco-AVPair := &reply:Cisco-AVPair &control:Tmp-String-0 := &control:Tmp-String-0 } } post-auth { cache_ldap update reply { Tmp-String-1 = "%{cache_ldap:control:Tmp-String-0}" } detail_reply } (0) # Executing section post-auth from file /usr/local/radius/etc/raddb/radiusd.conf (0) post-auth { (0) cache_ldap: EXPAND %{User-Name} (0) cache_ldap: --> E350 (0) cache_ldap: No cache entry found for "E350" (0) cache_ldap: Creating new cache entry (0) cache_ldap: &reply:Cisco-AVPair := &reply:Cisco-AVPair -> 'h323-ivr-in=ani:4822360460' (0) cache_ldap: &control:Tmp-String-0 := &control:Tmp-String-0 -> 'h323-ivr-in=ani:4822360460' (0) cache_ldap: Committed entry, TTL 300 seconds (0) [cache_ldap] = updated (0) update reply { (0) No cache entry found for "control:Tmp-String-0" (0) EXPAND %{cache_ldap:control:Tmp-String-0} (0) --> (0) Tmp-String-1 = (0) } # update reply = noop

3 4

Simultaneous-Use problems
by Marco Miglietta 27 Feb '20

27 Feb '20

Hi, can I receive a little help ? I use authentication with users in maria-db. Where I have to make settings in order to allow a unique login ? Attribute Simultaneous-Use as check ? Thank you. Marco.

1 0

Problem with backslash
by Martin Grůza 27 Feb '20

27 Feb '20

Hello, I have got problem with backslash when I set it to attribute and expand it to string, there are double backslash, but I want only one backslash. Thank you.

2 3

iOS and OSX issues
by Alan DeKok 26 Feb '20

26 Feb '20

If people are having issues with iOS and OSX getting online, you should check out Apples new guidelines: https://support.apple.com/en-ca/HT210176 Even if your certificates meet those criteria, they *might* still be rejected. If so, you should do some tests with the "example.com" certificates that the server builds in raddb/certs. Use a test machine (not the production RADIUS server!) and figure out if the certificates are accepted by iOS. If so, then you may have to get new production certificates which more closely match the test ones. iOS and OSX are "black boxes", and do NOT give useful information as to why they rejected the certificate. If they did, it would be a simple matter to fix the offending field. Instead, Apple punishes everyone for their own laziness. :( Alan DeKok.

2 4