Windows Task Scheduler Fails With Error Code 2147943785

In Windows Task Scheduler in tasks’ history you can see that it fails with error code 2147943785. This error code indicates permission issue with the account under which the task is run.

Check that the user that is running the scheduled task has Log On As Batch Job assignment. Open Start Menu > Administrative Tools > Local Security Policy > Local Policies > User Rights Assignment > Log On As Batch Job as seen below:


SfB Server 2015: Event 57005 Could not find stored procedure ‘XdsQueryCriticalDocumentSignatures’

skype-for-businessAfter applying cumulative update on Skype for Business I noticed the following errors in Event Log:Event-ID-57005-Could-not-find-stored-procedure-XdsQueryCriticalDocumentSignatures
Log Name: Lync Server
Source: LS User Store Sync Agent
Date: 04/23/2018 11:33:23
Event ID: 57005
Task Category: (1061)
Level: Error
Keywords: Classic
User: N/A
Error encountered pushing data to RtcXds Blob Store Continue reading

Set owner failed for Database ‘rtcxds’

skype-for-businessInstallation of Skype for Business database update failed with error “Set owner failed for Database ‘rtcxds’.”

Command used to update Skype for Business database:

The update script needs SQL user “sa” to be on place so make sure it was not renamed or deleted. In my case it was renamed so I renamed it back to “sa” and update script succeded.

How To Create SSL Certificate for Apache on CentOS 7

Apache HTTP ServerAn SSL certificate is an electronic ‘document’ that is used to bind together a public security key and a website’s identity information (such as name, location, etc.) by means of a digital signature. The ‘document’ is issued by a certificate provider such as GlobalSign, Verisign, GoDaddy, Comodo, Thawte, and others.

In this article I will show how to generate self-signed certificate for Apache on CentOS. Please note that self-signed certificate does encrypt communication between your server and any clients. However, because it is not signed by any of the trusted certificate authorities included with web browsers, it’s not trusted by browsers by default and can’t be used to verify the identity of your server.

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Redirect HTTP to HTTPS in Apache

Apache HTTP ServerLet’s say you want all traffic to your website use secured connection. You can redirect HTTP to HTTPS in Apache like following:

Using virtual hosts and Redirect directive

When using SSL, you will frequently have at least two virtual hosts: one on port 80 to serve ordinary requests, and one on port 443 to serve SSL. If you wish to redirect users from the non-secure site to the SSL site, you can use an ordinary Redirect directive inside the non-secure VirtualHost: Continue reading

SQL SSRS change certificate binding error

While deploying SQL Reporting Services I got the following error:
Create certificate binding.
We were unable to create the certificate binding.

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A2billing Install Guide

a2billing-call-flow-inbounda2billing-callflow-outboundThis guide will show you how to install A2Billing v2.2 on CentOS v7. It is assumed that you already have Asterisk and/or Freepbx installed (if not – install it first using this guide). It is also assumed that you have compiled Asterisk Realtime driver module (res_config_mysql) by selecting it in Asterisk Menuselect before compiling Asterisk. Continue reading

Asterisk Freepbx Install Guide

This guide covers Asterisk installation from source on CentOS 7. Freepbx 13 with Asterisk 13 will be installed on CentOS 7.
You have to do the installation as root user or with sudo. Continue reading

Asterisk packages installation on CentOS 7

Asterisk PBX

Officially now Asterisk packages repository is gone. Asterisk installation manual gone as well.

If you use Asterisk on CentOS or RHEL, you want to be using RPM packages, not messing around with building source tarballs on each of the machines you maintain. I use Asterisk on CentOS, both on CentOS 6 and more recently on CentOS 7 working with quite a few systems that it’s important to keep consistent. Luckily there is a Tucny repo with Asterisk packages for CentOS 7 Continue reading

Spamlists monitoring in Zabbix

Zabbix-monitoring-systemMost companies have a wide variety of services running, usually with public and private facing interfaces. If you are providing services like SMTP, DNS or similar to your customers, those services might be misused and you could end up getting your servers IP addresses blacklisted on various Domain Name System Blackhole Lists (DNSBL). This could hurt your reputation as a service provider and will certainly result in a bad experience for your customers.
You can check DNSBL manually but it’s better to do with Zabbix! Continue reading

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