Jun 05 2018
In some environments the following error may occur for ASP.NET:
Validation of viewstate MAC failed.
If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm.
AutoGenerate cannot be used in a cluster.
There are a few reasons of this error and you can solve it by adding MachineKey to the Web.config file of your application. To do this follow the steps: Continue reading
May 29 2018
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:
Apr 23 2018
After applying cumulative update on Skype for Business I noticed the following errors in Event Log:
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
Computer: sfbfe01.contoso.com
Description:
Error encountered pushing data to RtcXds Blob Store Continue reading
Apr 23 2018
Installation of Skype for Business database update failed with error “Set owner failed for Database ‘rtcxds’.”
Command used to update Skype for Business database:
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1 |
Install-CsDatabase -ConfiguredDatabases -SqlServerFqdn sfbsql01.contoso.com -Verbose |
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.
Mar 28 2018
An 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.
Mar 28 2018
Let’s say you want all traffic to your website use secured connection. You can redirect HTTP to HTTPS in Apache like following:
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
Mar 19 2018
While deploying SQL Reporting Services I got the following error:
Create certificate binding.
We were unable to create the certificate binding.
Continue reading
Mar 16 2018
This 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
Mar 15 2018
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
Mar 05 2018
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
