Tips

Short – but very useful bits of information. Shell commands, quick solutions and how-to`s too little for an article. These details can save your day, bit miss them – and you`ll dig in diagnostics.

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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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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Exchange 2013 How to remove a mailbox from quarantine

In this little tip we are going to learn how to return a mailbox from quarantine in Exchange Server 2013, but the same is valid for Exchange 2016 also.

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CentOS BIND Caching Proxy installation guide

BIND is the most popular DNS-Server in the world.Here is one of the simplest BIND deployments – CentOS BIND caching proxy server under CentOS 7

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Juniper SRX System services – SNMP

It is not always understood what SNMP OIDs or traps should be queried or monitored by SNMP management software or considered normal operation. Here we will describe basic SNMP configuration commands and provide baselines for monitoring SRX devices

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Juniper SRX System services – DNS

Here we gathered all necessary commands for setting up Juniper SRX System services – DNS and it’s features: DNSSEC, DNS-proxy and split-DNS

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CentOS 7 Initial configuration

Our initial configuration will include – changing the host name, network configuration and tools, and finally, SELinux

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MAC OS How to reset password without any tool

So, you have your Mac, and you forgot everything – your password, AppleID, and you do not have any recovery disks. When every other way fail – try this set of actions, because it is independent of Mac OS version, and do not require any tool or flash drive. In short, we delete a specific file and tell the system to rerun the Welcome Wizard, create temporary administrative account and use in to reset password

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CentOS 7: Fixing Failed to start LSB error when importing/exporting a VM

When you export/import a VM under CentOS, in VMWare or Hyper-V environment, you can meet very annoying error – network service in the system can’t be started. Failed to start LSB: Bring up/down networking. Read more and learn how to fix this error

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