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Config snippets : Configuring static IP address on Debian 6.0

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Just quick config snippet for Debian 6.0 which I came across when setting up few Debian Linux 6.0 virtual machines for recent network LAB. By default network adapter is set to get IP address from DHCP.

/etc/network/interfaces – dynamic IP address configuration

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface auto lo iface lo inet loopback
# The primary network interface allow-hotplug
eth0 iface eth0 inet dhcp

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How-to : Connect to Amazon EC2 Linux AMI using SecureCRT

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Recently I decided to use Amazon AWS EC2 platform to host systems in the Cloud. As operating system I needed is Linux I quickly deployed Amazon Linux AMI, which is quick and simple to do.

Once instance was created I downloaded key pair. Now it came down to connecting to my virtual machine in the cloud.My SSH client of choice is SecureCRT. Let’s see how to configure session parameters in SecureCRT in order to connect to Amazon Linux AMI instance hosted on EC2 platform.

I’m using SecureCRT 7.0.1 to connect to server hosted on Amazon EC2 platform.

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How-to : Package virtual machine for Riverbed Steelhead with RSP

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RSP platform installed on Riverbed allows to run VMware virtual machines on it. THat gives very powerful environment as Riverbed might become the only appliance deployed for branch office and with WAN optimization we can also provide basic services/systems to site. That gives us huge flexibility and same time no need to deploy additional systems for site can be placed on Riverbed as virtual machines. Of course that reuires special license and also additional RAM would be recommended, so we won’t suffer performance issues (additional memory can be purchased with Riverbed appliance and RSP license, so we get ready to go environment).

But it is not enough to create VMware cityual machine on PC and upload it to Riverbed. Few more steps is involved in the process and here we will go through all steps to see how to prepare virtual machine for Riverbed on Windows 7 PC with VMware Workstation 9 installed.

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Tips & Tricks : Yii framework update issue

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When Yii-based project doesn’t want to update, there might be missing component.

Once you add one plugin everything goes back to normal.

[root@arb-srv-01 easyforms]# composer update
Running composer as root/super user is highly discouraged as packages, plugins and scripts cannot always be trusted
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

Problem 1
- yiisoft/yii2 2.0.7 requires bower-asset/jquery 2.2.*@stable | 2.1.*@stable | 1.11.*@stable -> no matching package found.
- yiisoft/yii2 2.0.7 requires bower-asset/jquery 2.2.*@stable | 2.1.*@stable | 1.11.*@stable -> no matching package found.
- Installation request for yiisoft/yii2 2.0.7 -> satisfiable by yiisoft/yii2[2.0.7].

Potential causes:
- A typo in the package name
- The package is not available in a stable-enough version according to your minimum-stability setting
see <https://getcomposer.org/doc/04-schema.md#minimum-stability> for more details.

Read <https://getcomposer.org/doc/articles/troubleshooting.md> for further common problems.
[root@arb-srv-01 easyforms]# composer global require "fxp/composer-asset-plugin"

Changed current directory to /root/.config/composer
Running composer as root/super user is highly discouraged as packages, plugins and scripts cannot always be trusted
Using version ^1.2 for fxp/composer-asset-plugin
./composer.json has been created
Loading composer repositories with package information
Updating dependencies (including require-dev)
- Installing fxp/composer-asset-plugin (v1.2.1)
Downloading: 100%

Writing lock file
Generating autoload files
[root@arb-srv-01 easyforms]#

Hope that helps.

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Config snippets : ADLDS : Disable password policy

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By default password policy from Active Directory domain will impact ADLDS and users created in ADLDS instance. To prevent domain policies from enforcing password restrictions and rules on ADLDS users one simple setting has to be adjusted:

  • ADAMDisablePasswordPolicies

Here is how it looks on computer which has ADLDS instance installed on port 50389:

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Tips & Tricks : BitLocker requires recovery key when USB device connected at startup

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Sometimes when you start machine with BitLocker enabled and same time some storage device was connected to USB port, BitLocker might request Recovery Key. This happens because USB ports is listed on boot device search list. To avoid this type of event best idea is to remove USB from boot search list. However, changing list of boot devices might also trigger BitLocker.

How to deal with this type of situation? Follow steps below:

  1. Suspend BitLocker  – command: manage-bde -protectors -disable c:
  2. Reboot machine
  3. Go to BIOS and remove all USB devices from available boot devices list
  4. Boot up to Windows
  5. Resume BitLocker – command: manage-bde -protectors -enable c:
NOTE: All above commands have to be issues from Command Prompt with elevated privileges.

After that no more issues with BitLocker during startup when USB storage devices are connected.

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Tips & Tricks : Disable Microsoft Compatibility Telemetry Service

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In case Microsoft Compatibility Telemetry process takes a lot of your processor, you can easily remove it:

  1. Run Command Prompt as Administrator.
  2. Execute following commands in Command Prompt:
  • sc delete DiagTrack
  • sc delete dmwappushservice
  • echo “” > C:\ProgramData\Microsoft\Diagnosis\ETLLogs\AutoLogger\AutoLogger-Diagtrack-Listener.etl
  • reg add “HKLM\SOFTWARE\Policies\Microsoft\Windows\DataCollection” /v AllowTelemetry /t REG_DWORD /d 0 /f
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Config snippets : Cisco : Testing RADIUS authentication on IOS

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Recently was migrating RADIUS server on Windows from one machien to another. Once new serer was ready had to reconfigure Cisco router to authenticate remote users against new RADIUS. After pointing Cisco to new RADIUS machine made a quick test to check if router can authenticate without any issues. Here is how ot do it quickly:

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Config snippets : Cisco : DHCP on Catalyst switches

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Usually I tend to create DHCP server on Windows Server. However, sometimes there is no server on site. Only what I have are network devices, workstations and voip phones. In those cases I used to create DHCP server on switches. As environment I operate in contains mainly Cisco devices, each location has at least one or more Cisco Catalyst switches (2960 or 3560) it is possible to provide DHCP service using IOS features. Example contains DHCP configuration for network with different VLANs for data, voice and printers.

Below is short description and set of commands demonstrating how to setup:

  • DHCP scopes
  • Exclusions
  • Define DHCP helper on the interface
  • Check status of DHCP assignments

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Tips & Tricks : Installing PHP Xdebug on openSUSE from existing repo

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While using PhpStorm I tried to use remote PHP interpreter on my dev virtual machine. As I’m big openSUSE fan and user I have openSUSE Leap 42.1 as my development machine. Unfortunately there is no Xdebug for PHP distributed by default.

However, there is repository available, so it’s easy to add this missing component to my system.

Here is how…

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