| Security – Error installing Kali: “Installation step failed” |
When I was installing a Kali virtual machine, I came across an error in the “Software selection” step
After confirming the software, the installation shows an “Installation step failed” message.
After browsing through some sites and forums, apparently the problem could be related to not configuring enough space and a suggestion is configuring more than 30-40 GB. But no luck, … Read more
| Windows – Error connecting RDS RemoteApp Terminal services |
“The list of RemoteApp programs cannot be accessed. Verify that the management console is connected to the correct server and that you have Administrator privileges on the server, and then try again.”
Checking winrm everything seems to be correct:
c:\> winmgmt /salvagerepository
WMI repository is consistent
c:\> winmgmt /verifyrepository
WMI repository is consistentBut after resetting the repository, the … Read more
| Checkpoint – Policy installation failed. Error code: 0-2000040 |
This morning i have come across a Checkpoint problem: No way to perform a succesful policy installation in any of the several virtual system gateways I have in my environment.
As you can see the returning error is: Policy installation failed on the gateway. If the problem persists contact Check Point support [Error code: 0-2000040].
Fortunately i found a generic … Read more
| Powershell – Could not create SSL/TLS secure channel |
I use Powershell to send monitoring results to the Icinga API (passive checks). For example, to check if the Exchange backups were processed correctly, I run a Exchange powershell and then the results are sent using “Invoke-WebRequest” command.
Since I disabled obsolete and insecure TLSv1 and TLSv1.1 protocols in the Exchange server, the script was not working anymore returning error:… Read more
| Nextcloud – Error modifying files or folders: locked error |
Yesterday I came across a problem in which I tried to modify (rename, delete, …) a folder and it returned an error.
Nextcloud logs (/var/www/nextcloud/data/nextcloud.log) showed the following:
"reqId":"Pf4KW9q1WDVe1YdmG0Mt","level":3,"time":"2019-09-10T16:36:53+00:00","remoteAddr":"63.223.129.127","user":"user1","app":"no app in context","method":"DELETE","url":"\/remote.php\/dav\/files\/user1\/ALBUMS\/New%20folder","message":{"Exception":"OCP\\Lock\\LockedException","Message":"\"files\/8010dab5adf49336ecdaf75a2008d5ab\" is locked","Code":0,"Trace":[{"file":"\/var\/www\/html\/nextcloud\/lib\/private\/Files\/Storage\/Common.php","line":779,"function":"changeLock","class":"OC\\Lock\\DBLockingProvider","type":"->","args":["files\/8010dab5adf49336ecdaf75a2008d5ab",2]},{"file":"\/var\/www\/html\/nextcloud\/lib\/private\/Files\/Storage\/Wrapper\/Wrapper.php","line":615,"function":"changeLock","class":"OC\\Files\\Storage\\Common","type":"->","args":["Nueva carpeta",2,{"__class__":"OC\\Lock\\DBLockingProvider"}Enter maintenance mode
sudo -u www-data php occ maintenance:mode --on
Then, all entries of the table oc_file_locks … Read more
| Exchange – Cannot remove exchange certificate |
Some days ago I tried to cleanup old certificates from my Exchange servers, but I received the following error:
[PS] C:\> Remove-ExchangeCertificate -Thumbprint D09EDD6D5F18C175254AB97046AAAAAAAAAAAAA
Confirm
Are you sure you want to perform this action?
Remove certificate with thumbprint DD09EDD6D5F18C175254AB97046AAAAAAAAAAAAA from the computer's certificate store?
[Y] Yes [A] Yes to All [N] No [L] No to All [?] Help (default is |
| Exchange – SMTP error: 550 5.7.1 Client does not have permissions to send as this sender |
Last week I was testing the IMAP/SMTP connection of my Exchange 2013. Unexpectedly Outlook returned the following error:
The message does not appear completely but seems to be “550 5.7.1 Client does not have permissions to send as this sender”. Obviously the user does have the permissions (the user was the owner of the mailbox itself).
Thanks … Read more
| Apache – “Size of a request header field exceeds server limit” |
When trying to access to one of my published websites, the browser shows the following error:
Your browser sent a request that this server could not understand.
Size of a request header field exceeds server limit.
Searching on the Apache debug error traces took me to this error line:
[Thu Jul 14 11:50:18 2016] [error] [client 212.86.13.12] request failed: |
| Exchange 2013 – IMAP NTLM authentication error |
Exchange 2013 can produce IMAP issues when trying to authenticate. This is a known bug in CU9 and CU10 but in my CU12 scenario also happens.
The IMAPSettings EnableGSSAPIAndNTLMAuth atribute must be set to False in order to solve the problem.
Yesterday, when one of my users asked me how to configure the email client using IMAP I realized … Read more
|
| Exchange – Error 130 using Netbackup with DAG passive node |
When I was migrating my Exchange platform from 2010, I ensured that the backups using Veritas NetBackup were also working in Exchange 2013, both against the active or passive node of the DAG, and also the granular backups
At a certain moment, the backups started to fail (thanks I am monitoring the transaction log disks free space using … Read more
