Category Archives: Networking

Microsoft Networking

Installing GPMC on Windows Server 2008 and Windows Vista Service Pack 1

26 de Maio de 2010 – 14:29

The Group Policy Management Console is included in Windows Server 2008; however, you must install it before you can use it. The domain controller promotion process installs GPMC on the server, in addition to adding the domain controller to the domain. Additionally, you can install GPMC on a member server as long as it’s a member of the domain. Let’s look at two ways to install GPMC on Windows Server 2008 (other than through DCPROMO).

Installing GPMC using Server Manager (Windows Server 2008)

The Group Policy Management Console is a Feature in Windows Server 2008. You install Features using Server Manager. Once installed, you can access the feature using Server Manager or you can the specific management console (like gpmc.msc).

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Networking Utils

Tobi Oetiker’s MRTG – The Multi Router Traffic Grapher

6 de Janeiro de 2010 – 14:04

mrtg_logoWhat it does

You have a router, you want to know what it does all day long? Then MRTG is for you. It will monitor SNMP network devices and draw pretty pictures showing how much traffic has passed through each interface.

Routers are only the beginning. MRTG is being used to graph all sorts of network devices as well as everything else from weather data to vending machines.

MRTG is written in perl and works on Unix/Linux as well as Windows and even Netware systems. MRTG is free software licensed under the Gnu GPL.

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http://oss.oetiker.ch/mrtg/index.en.html

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Networking

File Server/AD Migration

11 de Novembro de 2009 – 11:42

Here’s the setup:
Single server that is a DC, DNS, DHCP and WINS server. Also hosts all file shares (user directories and shared folders) and printer shares.

Move everything over to the new server. Here’s how:

1.Build your new server
First thing, build you new server with the latest Windows 2003 software (we’ll stay on 2003 as that’s the most common right now). We’ll call the old server OLDDC and the new one NEWDC.

Give yourself a large C: partition, at least 25gb. The rest of can be partitioned into the D: drive. I don’t like to create a lot of partitions because they just cause more overhead for little purpose. ALWAYS keep your OS and data separate though!

As for the server, most places up through 100 users can easily get by with a single RAID controller running RAID5. You’ll see plenty of debate over this (RAID6, RAID10, etc) but I’ve had good luck with this configuration. 4gb of RAM for Windows Standard.

2. Promote the server to be the DC

a. Insert your new server into the domain. Make sure to install DNS, DHCP and WINS before continuing.
b. Run “DCPROMO” and make this a new DC in your domain.
c. Record your AD Recovery password!
d. Wait at least an hour or 2 to make sure everything gets replicated and you AD settles down.

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Networking Uncategorized

DHCP Database Topics

11 de Novembro de 2009 – 10:47

Perhaps you have never given the DHCP database a thought. Well the time may come where you need to backup, reconcile or compact the DHCP database. At the very least, I expect you will want to check your lease statistics.
Tutorial Topics for DHCP Database

  • DHCP – Display Statistics
  • DHCP Database
  • Backing up the DHCP Database
  • Reconcile
  • DHCP Audit Log
  • Summary – Challenges


DHCP – Display Statistics

Bizarrely, I find ‘Display Statistics’ the most difficult tab to find on the DHCP server. This is because it’s the first item on the menu, and is often masked by the very highlight that should attract me. I just hope that you are not afflicted by this blind spot. In any event, Display Statistics is one of the most interesting and rewarding items on the DHCP menu.

Display Statistics is available at both the server and the scope level. My first thought is, ‘How many leases are left?’ Next, I look to see if there have been any NACKS or lease declines. See the screen shot to find the Display Statistics… menu.

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Networking

Como se fabrica a fibra óptica

20 de Junho de 2009 – 1:41

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Networking Utils

Worm Conficker

9 de Abril de 2009 – 10:39

O Worm Conficker desabilita o acesso a uma serie de sites que nos permitem fazer download de actualizações de segurança. Se conseguir ver as próximas 6 imagens provavelmente não está infectado com o worm:


freebsd
fsc_logo_pos_112x128
headerlogo

linux
logotrendmicro_3d
openbsd

eEye fornece uma ferramenta gratuita para scanner do virus por ip ou gama de IPs.

Download Conficker Scanner

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Networking Utils

Pogoplug liga o seu dispositivo usb à internet

7 de Abril de 2009 – 2:11

product-fpo

O Pogoplug conecta o seu disco externo à internet, para que possa partilhar e aceder aos seus ficheiros de qualquer lado.

Com um valor a rondar os 100$.

Pode ter as drives num dos seguintes formatos: NTFS, FAT32, HFS+ (non-journaled) ou EXT-2/EXT-3.

Pode inclusivé conectar o seu hub usb e disponibilizar vários dispositivos na internet, em simultâneo.

homepage: http://www.pogoplug.com/
pogoplugsetup

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Microsoft Networking

Microsoft Hyper-V Server 2008 é disponibilizado gratuitamente!

21 de Janeiro de 2009 – 2:02

Download link

Download Microsoft Hyper-V Server 2008 Today!

Licensing Microsoft Hyper-V Server 2008

  • Microsoft Hyper-V Server 2008 is a stand-alone product that will be available via the Microsoft Download Center free of charge.
  • Microsoft Hyper-V Server 2008 does not require CALs for the product itself.
  • CALs will be required for all Windows Server virtualized operating systems which are hosted on Microsoft Hyper-V Server 2008.
  • Microsoft Hyper-V Server 2008 will be available in the following languages:
    • English (EN-US)
    • German (DE-DE)
    • Japanese (JA-JP)
    • French (FR-FR)
    • Spanish (ES-ES)
    • Chinese Hong-Kong (ZH-HK)
    • Chinese Simplified (ZH-CN)
    • Korean (KO-KR)
    • Portuguese (Brazil) (PT-BR)
    • Chinese Traditional (ZH-TW)
    • Italian (IT-IT)
    • Russian (RU-RU)

When to Use Hyper-V Server 2008

Microsoft Hyper-V Server 2008 is a great choice for customers who want a basic and simplified virtualization solution for consolidating servers as well as for development and test environments. Hyper-V Server 2008 only offers the most basic of virtualization features, making it ideal for:

  • Test and Development
  • Basic Server Consolidation
  • Branch Office Consolidation
  • Hosted Desktop Virtualization (VDI)

Customers who require richer and more robust virtualization features, such as Quick Migration, multi-site clustering, large memory support (greater than 32 GB of RAM), and more than four processors on the host server, should use Windows Server 2008. Windows Server 2008 provides business continuity, disaster recovery, greater scalability for consolidating large workloads, and flexible and cost-effective virtualization rights (one free virtual instance for Standard Edition, four free virtual instances for Enterprise Editions, and unlimited virtual instances for Datacenter Edition with the purchase of a license of Windows Server 2008).

The following table outlines which Hyper-V–enabled product would suit your needs:

Virtualization Needs

Microsoft Hyper-V Server 2008

Windows Server 2008 Standard

Windows Server 2008 Enterprise

Windows Server 2008 Datacenter

Server Consolidation

 Available Available Available Available

Test and Development

 Available Available Available Available

Mixed OS Virtualization (Linux and Windows)

 Available Available Available Available

Local Graphical User Interface

 Available Available Available

High Availability—Clustering

 Available Available

Quick Migration

 Available Available

Large Memory Support (Host OS) > 32 GB RAM

 Available Available

Support for > 4 Processors (Host OS)

 Available Available

Ability to Add Additional Server Roles

 Available Available Available

Guest Virtualization Rights Included in Host Server License

None—Each Windows Guest VM Requires a License

1 Physical + 1 VM*

1 Physical + 4 VMs*

1 Physical + Unlimited VMs (Free)

* Each additional Windows guest VM requires a license.

If you need to acquire and host new server licenses, Windows Server 2008 Standard, Enterprise, and Datacenter provide the best value.

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Networking

Virtualização: sinónimo de segurança e tranquilidade

20 de Dezembro de 2008 – 2:39

Excelente artigo sobre virtualização, disponivel em Belfiglio.NET :

Photobucket
Restrita a algumas corporações, mainframes ou presa a padrões proprietários de software, essa realidade não predomina mais.

Hoje está ao alcance de todos, transformando principalmente a TI no mundo corporativo, afinal, uma de suas grandes vantagens é a economia em relação a infra-estrutura (hardware, energia e espaço físico), disponibilizando as empresas um aumento de receitas para investimentos em outras áreas.

Segundo informações da Forrester Research, atualmente 40% das empresas norte-americanas utilizam essa tecnologia.
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Networking

Thomson TG787

17 de Setembro de 2008 – 0:29

Router habitualmente fornecido com serviço MEO (este e o 2WIRE).

Para aceder à consola de gestão do Router basta digitar o endereço 192.168.1.254 no browser colocar como Administrator e password

Port forward:

No menu do lado esquerdo e escolhe o tema “Ferramentas” > “partilha de jogos e aplicações” > ” Escolhe uma tarefa” e > “Criar novo jogo ou aplicação” > dás um nome ao programa > “entrada manual de portas”…vai aparecer umas textbox, escolhes TCP e vais ao teu programa e vês a porta TCP colocas o número da porta nessas textbox.

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