Libkrb5-dev Centos
Rocki Eibl
Right - it is caused by gssapi, which will be built from source if there's
no binary wheel available for your platform. It's not clear what platform
you're on, but installing the krb5-devel (Redhat/CentOS/Fedora)
or libkrb5-dev (Debian/Ubuntu) should solve the build issue.
>
> [What is worse is that, because - I think - of the dependency pinning
> approach that pgAdmin4 uses, the above downgrade to pgadmin4.30 is not the
> end of the story: I actually end up all the way back on pgadmin4.25, which
> is even more annoying, if not downright dangerous].
>
I'd need to dive into it some more. There are "extras", but from what I can
see these have to be explicitly installed. Ideally we want something that
will try to install gssapi automatically, but not get upset if it fails.
PowerShell Remoting (PSRemoting) is a protocol that PowerShell uses to execute PowerShell on another PowerShell instance. This can be another PowerShell process on the same host, or even another host altogether. PSRemoting works by encapsulating .NET objects, serialised in CLIXML, inside another remoting protocol like WSMan or SSH. If you are interested in learning more about PSRemoting, my PowerShell Remoting on Python post goes into more detail.
OMI will not fix PowerShell bugs meaning PowerShell cannot offer any level of support
Known and unknown security issues will not be fixed
OMI does not load OpenSSL correctly causing segfaults
OMI is written in C and is compiled to various shared library objects for the different functionality that it offers. PowerShell is only interested in using the mi library that is produced as that is where the WSMan client code is stored. If you look into your PowerShell directory on your Linux/macOS host you will see two different lib libraries that affect WSMan:
The psrpclient is basically a compatibility layer to translate the public interface that mi exposes to the same interface as the Win32 WSMan API calls. This compat layer mostly just allows PowerShell to call one interface for any WSMan calls across the various platforms. We can see the actual PInvoke definitions in the PowerShell codebase
In this case it is calling the WSManInitialize function, along with many others, that is exposed in WsmSvc.dll on Windows and libpsrpclient on other platforms. We can see in the psrpclient repo that WSManInitialize is mostly a shim for MI_Application_InitializeV1 which is the public interface exposed by mi.
So for PowerShell to be able to create WSMan instances on Linux it needs to be able to load psrpclient which in turn relies on mi being available. If any one of those libraries, or any of their linked dependencies are not present then PowerShell will fail with the following error:
So once we sole the linking problem and have gotten PowerShell to load mi, we move onto the next major problem with the library, the authentication process. The WSMan protocol supports the following authentication protocols:
If you want to learn more about how this works in WSMan, you can have a read of my Demystifying WinRM post. WSMan on Windows supports all these protocols out of the box but mi is only designed to work with Basic, Negotiate, and pure Kerberos authentication. Even if Certificate and CredSSP auth was implemented in the future in mi, there is a hardcoded check in the psrpclient library that returns an error if another authentication option was specified.
Some of these values depend on the authentication method chosen or how the client actually formats the data but the basic structure stays the same. On premise Exchange hosts changes the boundary to -- EncryptedBoundary (with the space) which is technically against the spec and mi was never able to handle that change breaking connections on those endpoints.
The decryption code in OMI was very temperamental in whether it worked or not. I was able to get it working from my main dev host but as soon as I was testing on a container host it was failing with the very unhelpful error:
When stepping through the code I found that the HttpClient_DecryptData function was failing to find the encrypted payload in the MIME data causing that failure. To solve this issue I decided to refactor the MIME parser logic in this function and came up with a solution that works everytime I run it and even handles the -- Encrypted Boundary setup that on premise Exchange endpoints send back.
The build.py script will read the centos8.json distribution meta file and create a bash script on the fly that will handle the deps for you. If you use the --output-script argument, the process will output the bash script that will build mi for you.
In this example I am connecting using explicit credentials and have specified the Negotiate protocol. The WSMan client will attempt to get a Kerberos ticket for those credentials and then start the Kerberos authentication process for SPN HTTP/server2019.domain.local. If any of those steps fail it will automatically fallback to using NTLM for the authentication exchange if the NTLM library is installed, otherwise it will fail. I could have also set -Authentication Kerberos instead of Negotiate if I wanted to ensure only Kerberos was used without the NTLM fallback. This could be ideal in your environments as NTLM is an old protocol and should be avoided where possible.
Enter-PSSession: Connecting to remote server 192.168.56.15 failed with the following error message : Authorization failed Unspecified GSS failure. Minor code may provide more information Server not found in Kerberos database For more information, see the about_Remote_Troubleshooting Help topic
While you still cannot use the new Exchange Online v2 Modules you can still use something like New-EXOPSSession to connect to Exchange Online using modern auth. With that script you can import that Exchange Online PSSession and use many of the cmdlets to manage your Exchange instance.
The MVP that I wanted out of this whole process was a library I can use to connect over WSMan to Windows targets and to Exchange Online. I think what I have right now meets that requirements but there is always room to improve things in the future. Some of the things that I think would be nice to add in the future are
I have using aaPanel and everything working well except php-imap, if i install php-imap from UI than php-fpm stop working so i am requesting to give us proper installation process to enable imap extension
ecryptom
Hi, is there any error during installation? It can be seen here.
If krb5-gssapi is missing, you can try to install libkrb5-dev and then reinstall imap
Cenots:
yum install krb5-devel
Dabian/ubuntu:
apt install libkrb5-dev