search for: ntlmv1

Hi, we have updated our samba AD domain from 4.4.x to 4.5.x. The release notes for 4.5.0 included  "NTLMv1 authentication disabled by default". So we had to enable it to get our radius (freeradius) server working (for 802.1x). What would be the best way to change the freeradius configuration in such a way, that we can disable NTLMv1 again. The radius server is used for WLAN (802.1x) and for...

...of months there is question like this either here on FR mailing list and all point down to the same issue, that is: freeradius uses ntlm_auth (even when using winbind with newer freeradius versions, it also in the end uses ntlm_auth). And since mschapv2 is needed for eap-peap, and it has to use ntlmv1. The only solution that I read about, but not actually tested is in this old thread: https://lists.samba.org/archive/samba/2012-March/166496.html I'm not sure if it works, or is there some other workaround. As far as I understand there is a special "flag" that can be send with free...

Folks, Our campus AD team has decided that they ... >Need to disable LM/NTLMv1 authentication support to provide greater >security and be consistent with the CITES authentication roadmap. Noble thoughts, but there hasn't been much thought of the ramifications for other, interoperable systems like Samba. I can see that modern Samba versions support NTLMv1 and NTLMv2...

Hello, i set up a squid proxy that should authenticate users against a samba PDC using winbind. It works fine as long i allow ntlmv1: on the PDC: ntlm auth = yes lanman auth = no client ntlmv2 auth = yes If i restrict the domains authentication method to ntlmv2 - that's what i want - with these settings: ntlm auth = no lanman auth = no client ntlmv2 auth = yes i get this error...

> > It might help if you told us how Extreme advised you to configure it. https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-set-internal-RADIUS-server-on-WiNG-with-LDAP-based-authentication http://www.michaelfmcnamara.com/files/motorola/WING5X_How_To_Active_Directory_Authentication_Rev_B.pdf https://www.manualslib.com/manual/1150860/Motorola-Wing-5-7-1.html

...r and 4.6.2 samba member + freeradius didn't work (got simple "nt_status_wrong_password") but: 4.7.6 AD and 4.7.1 samba + freeradius works just fine. It's clearly visible in logs. While using "ntlm auth = yes" I was getting in audit log Authentication_passwordType = NTLMv1, but with ntlm auth = ntlmv2-and-mschap2-only audit log shows Authentication_passwordType as "MSCHAP2" Not sure what's the case, maybe only starting with samba 4.7 ntlm_auth can send correct flag? Hope that helps. W dniu 26.03.2018 o 22:16, Jonathan Hunter via samba pisze: >...

...attempting to logon from Windows 2008R2 to Samba4 is made we can see in Samba smbd log the following important for understanding the situation lines: [2017/11/20 13:25:52.040094, 2, pid=7100, effective(0, 0), real(0, 0)] ../libcli/auth/ntlm_check.c:430(ntlm_password_check) ntlm_password_check: NTLMv1 passwords NOT PERMITTED for user <username> [2017/11/20 13:25:52.040110, 3, pid=7100, effective(0, 0), real(0, 0)] ../libcli/auth/ntlm_check.c:437(ntlm_password_check) ntlm_password_check: NEITHER LanMan nor NT password supplied for user <username> It tell us that Samba4 doesn't...

...14 and samba 4.7.x smb.conf on the DC is pretty basic, most important is obviously in [globall]:         ntlm auth = mschapv2-and-ntlmv2-only On server with freeradius + samba 4.6.2: machine is added to AD using samba with net ads join. Most important configuration to make mschapv2 only with ntlmv1 overall disabled (except for mschapv2) is setting in freeradius in /mods-available/mschap: mschap { ..... ntlm_auth = "/path/to/ntlm_auth *--allow-mschapv2* --request-nt-key --username=%{mschap:User-Name} --domain=WINDOWSDOMAIN --challenge=%{%{mschap:Challenge}:-00} --nt-response=%{%{m...

Hello, Two questions for you this evening. How do you tell the difference between NTLMv1-style authentication and NTLMv2 style? The CIFS dialect NT LM 0.12 does both(?), so does not appear in the NegProtRequest message (nor in the flags, near as I could tell). Do you ascertain this by examining the SessionSetupAndX message? If so, what parts? Is it possible to have more than one CI...

I know NTLMv1 isn't secure and NTLMv2 is better. But I need to test a client's NTMLv1 compatibility when the server does not support NTLMv2 and to do that I need samba (current version 3.0.33 via CentOS 4) to not try to negotiate NTMLv2. All the searches I've done tell me how to enable NTLMv2, but...

...rver: > client signing = mandatory | server signing = mandatory | smb > encrypt = mandatory > > How dangerous would it be to keep ntlm enabled? We do need to support > smbclient access. What else can we do to enable smbclient access? > > Thank you! I think you are confusing NTLMv1 (which you shouldn't use) and NTLMv2. Samba has had NTLMv1 turned off since 4.7.0 , if you want file sharing, you need NTLMv2. Rowland

Also I just facepalmed, as I double checked smb.conf right after sending mail, and in samba 4.7 there are new options available for "ntlm auth", as stated in docs: |mschapv2-and-ntlmv2-only| - Only allow NTLMv1 when the client promises that it is providing MSCHAPv2 authentication (such as the |ntlm_auth| tool). So that is is I suppose that special "flag" that is used by Microsoft NPS/AD. I t h i n k I tested it before, but couldn't get it to work and had to go back to "ntlmv1-permit...

...(auth_check_password_send) ? auth_check_password_send: Checking password for unmapped user [COMPANY]\[domainuser]@[DC1] ? auth_check_password_send: user is: [COMPANY]\[domainuser]@[DC1] [2019/11/06 15:27:32.952257,? 2] ../libcli/auth/ntlm_check.c:430(ntlm_password_check) ? ntlm_password_check: NTLMv1 passwords NOT PERMITTED for user domainuser [2019/11/06 15:27:32.952306,? 3] ../libcli/auth/ntlm_check.c:437(ntlm_password_check) ? ntlm_password_check: NEITHER LanMan nor NT password supplied for user domainuser [2019/11/06 15:27:32.953703,? 2] ../source4/auth/ntlm/auth.c:475(auth_check_passwo...

...rvers and two Samba DS-servers. Most >> people can authenticate OK, but one user always gets "wrong password". > What versions of Samba ? All servers are 4.9.5-Debian. >> Auth: [SMB2,(null)] user [SAD]\[username] at [Tue, 16 Jun 2020 >> 13:49:02.124298 EEST] with [NTLMv1] status [NT_STATUS_WRONG_PASSWORD] >> workstation [HP840-017] remote host [ipv6:xxx:xxx:xxx:36::100b:58502] >> mapped to [SAD]\[username]. local host [ipv6:xxx:xxx:xxx:xxx::3:445] >> > Is SMBv1 turned on, on the Win10 client ? I checked the "HKLM\SYSTEM\CurrentControlS...

You could try the setting. ntlm auth = mschapv2-and-ntlmv2-only >From man smb.conf The available settings are: · ntlmv1-permitted (alias yes) - Allow NTLMv1 and above for all clients. · ntlmv2-only (alias no) - Do not allow NTLMv1 to be used, but permit NTLMv2. · mschapv2-and-ntlmv2-only - Only allow NTLMv1 when the client promises that it is providing MSCHAPv2 authentication...

Are there multiple ways that Windows clients encrypt passwords? I'm seeing different behavior between two clients. On one, I can access a Samba share just fine. On the other, using the same username and password to access the same share, I get "incorrect password." Looking for the difference in Samba debug traces, I find it comes down to this: smb_password_ok: Checking SMB

...uot;ntlm auth" is set to "mschapv2-and-ntlmv2-only" fr + samba domain member (4.6 and 4.7) in mods-available/mschap you have to add to ntlm_auth --allow-mschapv2 to the whole string OR just use winbind method, which sets correct flag without explicitly adding it. with those settings ntlmv1 is blocked except for mschapv2, and it's nicely visible in samba auth_audit log. I also tried password change with ntlm_auth (for expired password at logon via FR) and it works fine too, with added --allow-mschapv2. I completely missed ntlm_auth option --allow-mschapv2! Thank You for pointing...

I set up winbind on one box successfully. Now a friend told me that it might be better to use ActiveDirectoriy (the PDC and all other servers are win2000). What is the difference in both approaches? which is 'better'? I feel that ldap is the more general and cleaner solution. Is that true? My windows-admins will get rid of wins soon. does winbind rely on wins? can libnss-ldap also create

...ource4/auth/ntlm/auth.c:70(auth_get_challenge) > > auth_get_challenge: returning previous challenge by module > netr_LogonSamLogonWithFlags (normal) > > [2023/04/04 08:36:31.662327, 2] > ../../libcli/auth/ntlm_check.c:473(ntlm_password_check) > > ntlm_password_check: NTLMv1 passwords NOT PERMITTED for user > tim.odriscoll You said earlier that you have set ntlm auth = mschapv2-and-ntlmv2-only This means to reject NTLMv1, which MSCHAPv2 is cryptographically, unless the client makes special pleading that it used MSCHAPv2 with it's client. This is related to...

> You said earlier that you have set ntlm auth = mschapv2-and-ntlmv2-only Yes, I found that here: https://wiki.samba.org/index.php/Authenticating_Freeradius_against_Active_Directory > This means to reject NTLMv1, which MSCHAPv2 is cryptographically, unless the client makes special pleading that it used MSCHAPv2 with it's client. > This is related to the missing ntlm_auth option --allow-mschapv2 I've got that option in my ntlm_auth command: (21) mschap: Executing: /usr/bin/ntlm_auth --request...