ZAMMAD | notification mail problem

Some users do not get notification mails? If a ticket status is changed the systems starts to email to a list of recipients. After each single successful delivery one info line is written to the tickets history. If one delivery fails (wrong address i.e.), the whole process is stopped (crashed? bug?)) and all these following […]

Windows | strange DNS resolve problem

Situation: Your machine lives in a corporate environment and uses your corporates own DNS resolver who’s located in your own LAN/IPsubnet. You didn’t define a default gateway in your IPv4 settings for security reasons. Resolving names via nslookup works fine, but windows himself (i.e ping) and third party software (like datev) run into resolve problems […]

nginx | redirect https://domain to different https://domain without browser cert errors

Standard nginx redirect: server { listen 80; listen 443 ssl; server_name http://www.domain-a.tld; return 301 https://www.domain-b.tld; } Produces browser ssl errors (wrong cert) cs before executing the redirecting order the https connection is established between your browser and the orig domain. Solution: Run certbot on the orig domain you redirect from: The bot inserts this […]

Windows 10 since 21H1 | Failed access to samba guest shares

You can’t connect to a samba server configured with map to guest = Bad User Don’t try this at home: Re-Enable the guest account fallback Your risky solution: Tune your GPO. Computer Configuration\Administrative Templates\Network\LanMan Workstation\Enable Insecure Guest Logons ATTENTION:I’ve had faced situation when this didn’t do the trick. I had to tune the registy: [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters] […]