Ldap_sasl_interactive_bind_s unknown authentication method -6


NIS is easy to setup and administer, scales reasonably well, is supported by nearly all forms of UNIX, and is thus very popular. Unfortunately, it is also completely insecure.

Weakly encrypted passwords, as well as everything else, are sent over the network in the clear. NIS is difficult to firewall. Clients have no way to ensure that the server they are talking to is actually an official server. Of course this has been known for many years, but NIS is still widely used ldap_sasl_interactive_bind_s unknown authentication method -6 a resonable alternative hasn't been available.

In the last couple of years there has been a lot of buzz about LDAP. The Lightweight Directory Access Protocol was designed as a way to access directories containing all matter of information. In theory this is a great idea, you can store all of the information you are used to storing in NIS user ids, group ids, home directories, etc.

The system administrators can access the information they need, HR can get the info they need, etc. It is all stored in a central database, eliminating data replication. And most LDAP server implementations support pretty good security ldap_sasl_interactive_bind_s unknown authentication method -6 SSL for authentication and transport encryption, fine grained access controls, etc. Unfortunately Internet security has gotten to the point that we can no longer wait for a NIS replacement that is just as easy to manage.

Hopefully this page will take some of the ldap_sasl_interactive_bind_s unknown authentication method -6 out of setting up a server and administering things. It can even be made reasonably secure with SSL and proper access controls. However, you're still putting private information into a directory designed to hold public data. Kerberos was designed to solve this problem. It has been around for a long time, it is relatively easy to setup, and client support is fairly widespread.

And Kerberos is even more secure than LDAP, because in a properly designed Kerberos environment even encrypted passwords are almost never transmitted across the network. The world of Kerberos and LDAP is filled with various standards, each of which comes with its own acronym or several.

Here are some of the common terms:. You'll need the following software. Hopefully your OS comes with pre-compiled packages for everything, if not you'll need to compile ldap_sasl_interactive_bind_s unknown authentication method -6 the order listed. The OS ships with the client software, and the server software is available for free download. The client interoperates with MIT Kerberos but the server does not. Turbo Fredriksson has some now fairly dated information about compiling all of this stuff which might prove helpful in a pinch.

The first thing to setup is your Kerberos servers called KDCs. Paths shown are for Red Hat Linux, they may differ on your system. You should have at least two KDCs, one of which will be the primary accepting password changes, new principals, etc.

Start with setting up the primary KDC, then when that is working move on to setting up the secondaries. Here are ldap_sasl_interactive_bind_s unknown authentication method -6 steps to getting your primary KDC running:.

At this point you should be able to kinit username where username is one of the principals you've created already. You should be prompted for a password. Then run klist to make sure everything looks OK. Then follow the instructions in the Kerberos documentation. Here is a sample ldap_sasl_interactive_bind_s unknown authentication method -6.

Note that kpropd can also be run in standalone mode with the -S switch if you aren't running inetd. Red Hat comes with a kprop ldap_sasl_interactive_bind_s unknown authentication method -6 script already setup to do this, just enable it with chkconfig. In ldap_sasl_interactive_bind_s unknown authentication method -6 you have packet filters between any of the elements of your Kerberos system, here are the ports you'll need to open up.

More information can be found in the Kerberos FAQ. Once you have a ldap_sasl_interactive_bind_s unknown authentication method -6 set of Kerberos servers, ldap_sasl_interactive_bind_s unknown authentication method -6 probably want to be able to log into your system using your Kerberos password. So we need to modify the PAM configuration to use Kerberos. First off, if the system you are setting up isn't one of the KDCs themselves, you'll need to copy krb5.

If the system you are setting up isn't one of the KDCs, do a kinit first to make sure that basic Kerberos is working. Then try to log in on the console.

Make sure to remove it once you ldap_sasl_interactive_bind_s unknown authentication method -6 things working, since it generates ldap_sasl_interactive_bind_s unknown authentication method -6 lot of log data. Now you'll want any application that does authentication to talk to Kerberos. You can either have the application talk directly to Kerberos if it supports itor use PAM. Using PAM allows you to have Kerberos support in any application that supports PAM, as opposed to having to have native Kerberos support in each of those applications.

Since PAM ldap_sasl_interactive_bind_s unknown authentication method -6 is more widespread than native Ldap_sasl_interactive_bind_s unknown authentication method -6 support, this is generally a good idea. However, you do lose the advantages of native Kerberos authentication, namely the ability to authenticate once and have a ticket for 8 ldap_sasl_interactive_bind_s unknown authentication method -6.

Some applications like OpenSSH can support both. You'll have to figure out what is available and what makes the most sense for your applications. If you are only using applications supplied by your OS vendor, and your OS supports PAM, then you probably don't need to worry about this.

But if you compile your own applications, you'll need to make sure that you compile in PAM support. Sudo and xlockmore are a couple that I had to recompile on a few systems, specifically enabling PAM when running configure.

Running ldd on an application will show you if it is linked against libpam or not, ldap_sasl_interactive_bind_s unknown authentication method -6 quick test to see if it was compiled with PAM support. Useful on something like a print server, etc.

However, it seems to be the best way to do it since configuring each application with proper authorization settings is difficult at best. Linux provides a variety of PAM modules for doing authorization. Unfortunately we discovered that it can only filter on the user's primary group, ldap_sasl_interactive_bind_s unknown authentication method -6 we wanted to filter on supplementary groups. This was pretty simple, just a few minor changes.

It isn't very well documented This doesn't work as well as having a Windows domain, since the accounts are still local to each box and thus you can't centrally manage group memberships, etc. However, it might be sufficient for a small operation.

The following set of steps worked for me for setting up a Windows Professional workstation to talk to a MIT Kerberos server. The definitive document for this although it is not much more helpful is this document from Microsoft. If you make a mistake in the mapuser command, there is no way to change it except editing the registry.

For any network service which accepts native Kerberos authentication instead of taking a username and password and authenticating the user via PAMyou need ldap_sasl_interactive_bind_s unknown authentication method -6 have a service principal stored in a keytab.

Some common ones are:. An additional note, Solaris 9 apparently doesn't support the des3-hmac-sha1: Rather than just ignore that key and use the des-cbc-crc: So when creating the host principals for Solaris 9, use commands like the following which only create des-cbc-crc keys, instead of both like normal.

For an example, see the instructions for LDAP below. At this point you should have a fully functional Kerberos setup. Make sure everything is working perfectly before you move on to configuring LDAP.

I recommend calling both ldap. You could purchase these, but making your own is easy and doesn't cause any extra headaches like making your own Web SSL certificates does. Instructions for making certs can be found here and many other places on the web, or you can use my JavaCA tool. When creating the cert, you should use the official hostname as reported by a reverse DNS lookup in the CN field.

The format is like this:. Once you've got the cert, you'll need to make sure that the key portion of it some certs have both the key and the cert in one file, others have them seperated is readable by the server that the ldap user will run as, but preferably not owned or writeable by that user, nor readable by anyone else.

Something like chown root: The permissions on this keytab file should be the same as on the SSL key. Be careful with the hostname here, it needs to match what you get for a reverse lookup of the server's IP address. If you have the short i. Next up is creating your slapd. Here's a sample one. Some of the things you need to edit are:. This provides some performance and ldap_sasl_interactive_bind_s unknown authentication method -6 improvements, but it also means that you have to start treating Berkeley DB as a real database.

The biggest issue is that you have to tune Berkeley DB to your environment. Some of the Berkeley DB settings can be changed in slapd. See this FAQ entry for more details. However, you'll need to do some research and determine the appropriate settings based on your environment. Then configure slapd to be started at boot time and start it.

The command line should look like the following. This presumes that the default group for the ldap user is the ldap group. If not, you'll need to add a -g ldap to make sure that slapd is running as group ldap so it can read the Kerberos keytab and SSL key.

The -h option tells slapd to listen on both the standard and ldaps ports.

This may occur for many reasons:. The no such object error is generally returned when the target DN of the operation cannot be located. This section details reasons common to all operations. You should also look for answers specific to the operation as indicated in the error message. The most common reason for this error is non-existence of the named object. Ldap_sasl_interactive_bind_s unknown authentication method -6, check for typos. Also note that, by default, a new directory server holds no objects except for a few system entries.

So, if you are setting up a new directory server and get this message, it may simply be that you have yet to add the object you are trying to locate. The error commonly occurs because a DN was not specified and a default was not properly configured. The -b should be specified for all LDAP commands unless you have an ldap.

Also, slapadd 8 and its ancillary programs are very strict about the syntax of the LDIF file. Some liberties in the LDIF file may result in an apparently successful creation of the database, but accessing some parts of it may be difficult. One known ldap_sasl_interactive_bind_s unknown authentication method -6 error in database creation is putting a blank line before the first entry in the LDIF file.

There must be no leading blank lines in the LDIF file. It is generally recommended that ldapadd 1 be used instead of slapadd 8 when adding new entries your directory. Another cause of this message is a referral entry to an unpopulated directory.

Either remove the referral, or add a single record with the referral base DN to the empty directory. This error may also occur when slapd is unable to access the contents of its database because of file permission problems.

For instance, on a Red Hat Linux system, slapd runs as user 'ldap'. To resolve, just place a in front of line and restart slapd or point it to an available ldap server. The OpenLDAP server will return an unwilling to perform error if the backend holding the target entry does not support the given operation. The password backend is only willing to perform searches. It will return an unwilling to perform error for all other operations.

The shell backend is configurable and may support a limited subset of operations. Check for other errors indicating a shortage of resources required by the directory server. This error occurs when server denies the operation due to insufficient access. This is usually caused by binding to a DN with insufficient privileges ldap_sasl_interactive_bind_s unknown authentication method -6 binding anonymously to perform the operation. Otherwise, you must bind to an entry which has been granted the appropriate rights through access controls.

Insufficient access Xref Access Control. The target or other DN of the operation is invalid. This implies that either the string representation of the DN is not in the required form, one of the types in the attribute value assertions is not defined, or one of the values in the attribute value assertions does not conform to the appropriate syntax.

This error generally occurs when ldap_sasl_interactive_bind_s unknown authentication method -6 client chases a referral which refers itself back to a server it already contacted. The server responds as it did before and the client loops. This loop is detected when the hop limit is exceeded. This is most often caused through misconfiguration of the server's default referral. The default referral should not be ldap_sasl_interactive_bind_s unknown authentication method -6.

That is, on ldap: In some versions of slapd 8operationsError was returned instead of other. The other result code indicates an internal error has occurred. While the additional information provided with the result code might provide some hint as to the problem, often one will need to consult the server's log files. This error is reported when a value of an attribute does not conform to syntax restrictions.

Additional information is commonly provided stating which value of which attribute was found to be invalid. Double check this value and other values the server will only report the first error it finds. For instance, this error is returned if the objectClass value provided is unrecognized. This error is returned with the entry to be added or the entry as modified violates the object class schema rules. Normally additional information is returned the error detailing the violation.

Some of these are detailed ldap_sasl_interactive_bind_s unknown authentication method -6. No such object" error is commonly returned if parent of the entry being added does not exist. Add the parent entry first You ldap_sasl_interactive_bind_s unknown authentication method -6 use ldapsearch to see if does exist:.

If it doesn't, add it. See the Quick Start Guide http: This error will also occur if you try to add any entry that the server is not configured to hold. The object is said to belong to this class, zero or more auxiliaries classes, and their super classes. While all of these classes are commonly listed in the objectClass attribute of the entry, one of these classes is the structural object class of the entry. Thus, it is OK for an objectClass attribute to contain inetOrgPerson, organizationalPerson, and person because they inherit one from another to form a single super ldap_sasl_interactive_bind_s unknown authentication method -6 chain.

On the other hand, it is invalid for both inetOrgPerson and account to be listed in objectClass as inetOrgPerson and account are not part ldap_sasl_interactive_bind_s unknown authentication method -6 the same super class chain unless some other class is also listed with is a subclass of both. To resolve this problem, one must determine which class will better serve structural object class for the entry, adding this class to the objectClass attribute if not already presentand remove any other structural class from the entry's objectClass attribute which is not a super class of the structural object class.

Which object class is better depends on the particulars of the situation. One generally should consult the documentation for the applications one is using for help in making the determination. While this normally should produce an object class violation error, some versions of slapd 8 contain a minor bug which cause the object class error not to be properly detected. In these versions, slapd 8 instead catches its failure to populate the structuralObjectClass operational attribute hence the internal error.

Naming attributes are those attributeTypes that appear in an entry's RDN; distinguished values are the values of the naming attributes that appear in an entry's RDN, e. See RFC for details. If the target entry name places is not within any of the databases the server is configured to hold and ldap_sasl_interactive_bind_s unknown authentication method -6 server has no knowledge of a global superior, the server will indicate it is unwilling to perform the operation and provide the text "no global superior knowledge" as additional text.

Likely the entry name is incorrect, or the server is not properly configured to hold the named entry, or, in distributed directory environments, a default referral was not configured. Current versions of slapd 8 requires that clients have authentication permission to attribute types used for authentication purposes before accessing them to perform the bind operation.

As all bind operations are done anonymously regardless of previous bind successthe auth access must be granted to anonymous. Note that latest versions of slapd 8 will report invalid credentials in cases where the client has insufficient access to complete the operation. This is avoid inappropriate disclosure of the validity of the user's name. The error usually occurs when the credentials password provided does not match the ldap_sasl_interactive_bind_s unknown authentication method -6 held in entry you are binding to.

In addition to the cases mentioned ldap_sasl_interactive_bind_s unknown authentication method -6 you should check if the server denied access to userPassword on selected parts of the directory. In ldap_sasl_interactive_bind_s unknown authentication method -6, slapd always returns "Invalid credentials" in case of failed bind, regardless of the failure reason, since other ldap_sasl_interactive_bind_s unknown authentication method -6 codes could reveal the validity of the user's name.

To debug access rules defined in slapd. Invalid credentials when the entry associated with the bind DN cannot be located. This error occurs when binding using the rootdn and the asserted value doesn't match configured password value.

Rootpw values must be conform to Ldap_sasl_interactive_bind_s unknown authentication method -6 format defined for userPassword. There error is generally occurs when the LDAP version requested by the client is not supported by the server. Note that the 2. In particular, it commonly occurs when one tries to change the structure of the ldap_sasl_interactive_bind_s unknown authentication method -6 from one class to another, for instance, trying to change an 'apple' into a 'pear' or a 'fruit' into a 'pear'.

To overcome this restriction in 2. By default, SASL authentication is used. The error will occur when the server doesn't provide a root DSE. This may be due to access controls. To force use of "simple" bind, use the "-x" option.

Use of "simple" bind is not recommended unless one has adequate confidentiality protection in place e. The supportedSASLmechanism attribute lists mechanisms ldap_sasl_interactive_bind_s unknown authentication method -6 available. The list may be empty because none of the supported mechanisms are currently available. This indicates that none of the SASL authentication supported by the server are supported by the client, or that they are too weak or otherwise inappropriate for use by the client.

This error is returned with the server responses to an LDAPv2 search query with both results zero or more matched entries and references referrals to other servers. If the updatedn on the replica does not exist, a referral will be returned.

It may do this as well if the ACL needs tweaking. For instance, when specifying both "-H ldaps: This slapd error generally indicates that the client sent a message that exceeded an administrative limit. This message is not indicative of abnormal behavior or error.

It simply means that expected data is not yet available from ldap_sasl_interactive_bind_s unknown authentication method -6 resource, in this context, a network socket. This message indicates that the operating system does not support one of the protocol address families which slapd 8 was configured to support. Most ldap_sasl_interactive_bind_s unknown authentication method -6, this occurs when slapd 8 was configured to support IPv6 yet the operating system kernel wasn't.

In such cases, the message can be ignored.

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