Samba sid domain

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Samba sid domain

Unix-like filesystems are often shared through NFS and the problem is how do you make all systems deal with every system having their own user and group database.

Another type of problem arises if you want to mix Unix-like systems with Windows-like systems. For both groups there is an identical set of numbers that van be used, and they are treated as different entities. Due to this setup groupnames and usernames can be the same, or can be different and have the same number. This is not the case on Windows-systems.

Windows maps account names and group names to a SID, which is globally unique. So there can never be 2 identical SIDs within one network. Next to that a name must be unique too. As you can imagine mixing those two systems can be a real challenge. This document will try to shed some light on the different systems and how you can arrange your systems such that problems or conflicts are less likely to happen. Even more complex is the situation around nobody. The user nobody and group nogroup came from the NFS software and was defined as being having the highest ID, since the function was oposite to the root.

Package: samba (2:4.11.5+dfsg-1 and others)

However a bit system has another highest number then a bit system: bit systems: To this confusion was added the use of using -2 for the nobody ID, as was done by the software itself if nobody and nogroup where not defined. And there is nogroup usage, but also groups that are called nobody. IDs are reserved for local system users, meaning these are only available to the local system, they are not part of LDAP.

But in the end this is only cosmetics. Within an Microsoft networking environment the SID is globally unique.

samba sid domain

In comparision with Unix-like systems, you could create a group with gid 99 and a user with uid 99, meaning that on a system level both have an ID of This is not possible in a Microsoft world. It should also be noted that you can not have a group with name "test" and a user called "test". Also the naming has to be unique within your domain. Relative to the SID that is. The RID is the last part and should be unique for a certain object within a domain. The components in this structure are: Revision The revision is always 1 for current NT versions.

Which could look like this S The 3 RIDs are created during initial domain installation. Since it is a random number duplicates can exist, there is no such thing as a central domain number authority. Mixing local accounts and AD accounts within the same name space, although this works, can confuse management of UNIX file system permissions as seen from a Windows client.

Make sure the Windows Guest account is mapped to the Unix nobody account by using the following in the [global] section of your smb. World SID authority: used for the "Everyone" group, which is the only account in this authority. Local SID authority: used for the "Local" group, which is the only account in this group.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Server Fault is a question and answer site for system and network administrators.

It only takes a minute to sign up. I'm trying to get my new samba server running for days now and I start losing my mind over not figuring out what I'm doing wrong. Here's my setup:.

OpenLDAP 2. Now here's the smb. Using smbclient -L localhost -U someid the log file says:. What I see here is that the samba server does not recognize the primary group of the user which is an existing group in the LDAP and therefor maps the primary group to its local "Domain Users" group which then obviously does not match the domainSID of the userid.

But why doesn't the samba server recognize the group? Or is there a different underlying problem? No error message, just executed successfully but getlocalsid returned the old SID. Setting the domainsid of the samba server to the SID of the ldap server. Tried adding the server to the domain with net join XXX but the answer was just "standalone server cannot join domain". I tried to run smbpasswd -a to add the user to the local samba db even though this would not be an option for the final solution, but that's what other users recommendedbut the error didn't change.

samba sid domain

I had a similar issue. If not you will get the following error message in the Samba log in your server. On your server run net getdomainsid.

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This will return the localsid and domainsid. These values should match. If they do not run net setdomainsid to the value of SID for local machine. For example the sambaSID for someuser would be S and their sambaPrimaryGroupID would be S The sambaSID for the group would be SBy using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Server Fault is a question and answer site for system and network administrators. It only takes a minute to sign up. I use the following command:.

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However this does not change. I have tried stopping all services and changing the SID but still no change unfortunately. I still getting the old SID:. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Asked 4 years, 3 months ago. Active 4 years, 3 months ago.

Viewed 3k times. I use the following command: net setdomainsid S However this does not change. Could you help me out changing the domainSID to the one I want. Kind regards. Unborn Unborn 3 1 1 silver badge 2 2 bronze badges. Active Oldest Votes. Try: Stop Samba Backup and delete secrets. Check result with net getdomainsid Start Samba. Thanks for the reply, but net setlocalid only changes the server SID if I understand correctly.

I did as you suggested. The domainSID did not change however.In Windows environment, each domain and local user, group and other security objects are assigned a unique identifier — Security Identifier or SID. It is a SID, but not the username, that is used to control access to different resources: network shared folders, registry keys, file system objects, printers, etc. The command above returned the SID of the specified local user. In this example — S If you need to get the SID of the current user under which the command is being executedrun the following command:.

Using the two. NET classes System. SecurityIdentifier and System. Translate [System. You must specify your domain name in the following command:. Get the SID for the jjsmith account:. Net classes mentioned earlier:. NTAccount "corp. To get the name of the user account by the SID a reverse procedureyou can use one of the following commands:.

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You can also find out the group or user name by SID with the built-in PowerShell classes without additional modules :. This was very useful, and thank you. Do you happen to know what these mean? And why some have more groups of numbers than others? Are they group SIDs, perhaps, that are appended? Thanks very much in advance. Showing multiple ways to obtain result.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I would like to be either able to map such a SID into a name, like 'myunixaccount', similar to this functionality for Windows account mapping:. It did not help. Therefore some extra environment description:.

When using a PC on the domain, it doesn't ask for credentials. Some samples, the user gle3 highlighted in 1 also exists in the domain but with a different SID. In 2 you can see that the user exists in the used passwd configuration. In 3 you can see that the default group does not exist, and that is why the permissions can not resolve it to a name. I'm pretty sure that what you're asking is not part of the SMB protocol.

You can actually see that: if Windows cannot resolve the credentials, it will show the SID's in the security properties. They work like GUID's. There's actually a lot more than this The key takeaway from this comment is that while all usernames have a SID, it's not true that all SID's also have a username.

If you have an AD somewhere you seem to doa proper setup contains all users here. The easiest way to get the complete mapping is to simply enumerate the complete active directory.

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That should contain all the mappings. Basically that works like this:. Learn more. Asked 4 years, 9 months ago. Active 4 years, 9 months ago. Viewed 5k times.

samba sid domain

Translate typeof NTAccount. Value; Windows itself is able to make this mapping, but I seem unable to find a mapping algorithm.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. It only takes a minute to sign up. I have a CentOS 7. Samba Version 4. And finally: is there a way to make sssd automatically set this domain SID for Samba while joining the domain?

Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Asked 1 year, 6 months ago.

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Active 1 year, 6 months ago. Viewed 2k times. This is my scenario: I have a CentOS 7.

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Reinaldo Gomes. Reinaldo Gomes Reinaldo Gomes 61 5 5 bronze badges. But i've found out that I can use "net rpc getsid" to set the domain SID into samba's secrets. Active Oldest Votes. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.

How to Convert SID to User/Group Name and User to SID?

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