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Preparing for a cert exam, searching for precise manuals without errors or figuring out how to deploy a feature or service you`ve never used before? The devil is in details, and we are here to fill the informational gaps and provide every detail you need. Because only knowing the details makes us what we are - a true pro`s

Exchange 2016 Back Pressure Troubleshooting

In most cases, first time people realize this feature ever exists is when the senders receive this error, and mail delivery becomes slow or stops at all: 452 4.3.1 Insufficient system resources. A reboot will temporarily solve the problem, but you definitely don’t want to do this. So, what is the Back Pressure, and how solve this problem? Read on

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Rsyslog and LogAnalyzer installation how-to

I want to collect all the logs from all the systems and network devices to one service, browse them and get reports and statistics. That is why I’ve implemented Rsyslog – maybe the most common tool for collecting logs.┬áPlus, it can be set up to write all gathered logs to MySQL Database – and LogAnalyzer will take them from it and give them a comfortable and nice interface

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Juniper SRX PPTP Passthrough or Static NAT

A common network scenario – how to provide access to internal resources through firewall from external users. In this particular case, we will talk about providing access for PPTP VPN-Clients to connect to our VPN-Gateway behind Juniper SRX. This scheme is called PPTP Passthrough or Static NAT (this is more complex, because we can NAT every IP or protocol through SRX). And here is a little tip how to do this

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Exchange 2016 – How to repair corrupted database

So that is the issue – Mailbox Database is offline, and can’t be mounted. I have bad news for you – your database is corrupted. And if you have no backups – it’s time to do recovery, and repair corrupted database.

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CentOS 7 Spacewalk kickstart

Spacewalk is an open source Linux systems management solution rich with different functions, that include installing and upgrading software, OS, making security check and more. In the last post, dedicated to Spacewalk, we will describe the process of setting up Spacewalk Kickstart, or remote installation over the network. For this purpose, it is bound with Cobbler – a Linux installation server that allows for rapid setup of network installation environments.

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CentOS 7 Spacewalk Features

Spacewalk is an open source Linux systems management solution rich with different functions, that include installing and upgrading software, OS, making security check and more. There are Spacewalk features that we can set up and use: remote commands, manage errata and make security scans, deploy files and monitor software crashes

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CentOS 7 How to install and register clients with Spacewalk

Spacewalk is an open source Linux systems management solution rich with different functions, that include installing and upgrading software, OS, making security check and more. In the previous articles we have learned hot to install Spacewalk and set up repositories. So the server job is done, now it is time to add some clients to manage

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CentOS 7 How to configure channels in Spacewalk

Spacewalk is an open source Linux systems management solution rich with different functions, that include installing and upgrading software, OS, making security check and more. But the basis for most functions are configured channels, so let’s find out, how to configure channels in Spacewalk.

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CentOS 7 How to install Spacewalk

I needed something like WSUS for CentOS, and Spacewalk provides that ability – patch management. But soon I’ve realized that gained so much more! In these articles we will talk about the most interesting features of this system. But to start using this system – at first, we must install it

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Windows Server 2012 R2 – Analyze dumps with WinDBG to discover a faulty device

Sometimes the thing go bad and server crashes unexpectedly. When this happens, we see a blue screen of death – while the system makes kernel or memory dump for us for further analysis.
But how to analyze dump and find out the reason of BSOD? Here in this little tip we will try to find a faulty device with help of windows debugger – WinDBG

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