CallManager Express GUI Bug - Version 8.8 & 9.0

Cisco CallManager Express Web Interface (GUI) bug on version CME 8.8 & 9.0. This news post serves to inform CME engineers and users about a GUI bug that renders useless the web interface as no changes can be saved. Work-around provided.

http://www.firewall.cx/cisco-technical-knowledgebase/cisco-voice/886.html

Installation and Setup of Cisco SG500-52P - 500 Series Stackable Managed Switches

This article introduces the Cisco SG500 series switches and covers basic and advanced features. Topics include: Connecting to CLI, Vlan configuration, Enabling Router mode, assigning IP addresses, default Gateway, DNS, IP routing, NTP, management methods and much more.

http://www.firewall.cx/cisco-technical-knowledgebase/cisco-switches/885-cisco-switches-sg500-52p.html

Is your desk filled with Cisco Press? | Impress Cisco Press and Win Free Cisco Press Books

Cisco Press will give away Free books to three lucky winners who upload pictures of their Cisco Press collection - Let's impress Cisco Press!! Check our link to read more on this amazing competition!!!

http://www.firewall.cx/news/162-Education/884-cisco-press-awards.html

Errdisable Port State, Enable & Disable Autorecovery Feature

This article explains the Errdisable feature on Cisco Catalyst switches. Learn why and how ports are automatically disabled/shutdown, how to configure the Catalyst switches for autorecovery from err-disable states and selectively disable Errdisable feature for different reasons.

http://www.onlywire.com/r/93603749

LPT Ports - Parallel Direct Cable Connection and pinouts

This article explains the how the PC parallel port works and its pinouts. Covered topics include type of parallel ports, pinouts, 4 and 8 bit ports, EPP Port, ECP Port, transfer speeds and more. We show how to create a LPT Direct connect cable and provide a Direct Parallel connection monitor utility.

http://www.firewall.cx/networking-topics/cabling-utp-fibre/120-network-parallel-cable.html

CAT5, CAT5e, CAT6 UTP X-Over Cable

This article shows how to create a UTP cross-over (x-over) cable using CAT5, CAT5e or CAT6 cable. We explain when UTP crossover cable is required, how to use it and its differences with UTP straight-thru cable. Detailed diagrams and information is included to ensure no question is left unanswered!

http://www.firewall.cx/networking-topics/cabling-utp-fibre/114-network-cabling-utp-xover.html

Resolving Cisco Router/Switch Tftp Problems: Source IP Address - The 'IP TFTP Source-Interface' Command

This article explains how to configure a Cisco device with multiple IP interfaces (router or switch) with the 'tftp source interface' command, to help overcome problems when trying to tftp to or from the Cisco device.

http://www.firewall.cx/cisco-technical-knowledgebase/cisco-routers/882-cisco-ip-tftp-source-interface.html

Understanding Serial Direct Cable Connection

This article explains the concept of serial data connections. Topics covered include: PC Serial ports, pinouts, speeds, connector interfaces (db9, db25), null modem cable pinout (db9 and db25) and much more. Included are diagrams with all pinouts and functions.

http://www.firewall.cx/networking-topics/cabling-utp-fibre/121-network-serial-cable.html

Understanding Straight Thru UTP Ethernet Cables

This article covers UTP Cat5, Cat5e & Cat6 cabling, pin designations (pinouts) for both T-586A & T-586B standards, schematics, plus a wealth amount of information to help you understand the differences between the available standards.

http://www.firewall.cx/networking-topics/cabling-utp-fibre/113-network-cabling-utp-st.html

Unshielded Twisted Pair (UTP) - CAT 1 to CAT5, 5e & 6

Introduction to network cabling. This introduction article examines the different type of category cables available in the market - from the older CAT1 cable standard to the newer CAT5e & CAT6 supporting up to 1Gbps speeds.

http://www.firewall.cx/networking-topics/cabling-utp-fibre/112-network-cabling-utp.html

Installing & Configuring Linux Webmin - Linux Web-Based Administration

Linux Administration made easy with Webmin. Learn how to fully administer Linux via web-based interface. Covered topics include: Webmin installation, linux user & group management, file system, disk quota, linux bootup & shutdown process, log files, dns server, dhcp server, ftp server, linux backup, cron jobs, ssh server, apache http server and much more.

http://www.firewall.cx/linux-knowledgebase-tutorials/linux-administration/880-linux-webmin-config.html

Configuring Domain Group Policy for Windows 2003

This article shows you how to configure a Windows Domain Group Policy to control and restrict user access to your servers and local machines. Step-by-step instructions provide all the necessary information to configure your domain group policy.

http://www.firewall.cx/microsoft-knowledgebase/windows-2003-server/241-domain-group-policy.html

Configuring Local Group Policy for Windows 2003

Learn how to configure local group policies for Windows Server 2003, 2008 and 2000. This article will show you step-by-step how to configure Windows Local group policies to help control your users access on a Windows server.

http://www.firewall.cx/microsoft-knowledgebase/windows-2003-server/240-local-group-policy.html

Creating Windows Users and Groups with Windows 2003

Learn how to create local users and groups in Windows 2003. This article shows to how to configure local and domain accounts and groups on Windows 2003 server. Step by step instructions along side with detailed screenshots will provide you will all the necessary information to successfully configure your server.

http://www.firewall.cx/microsoft-knowledgebase/windows-2003-server/239-windows-2003-users-groups.html

VLAN Security - Making the Most of VLANs

VLAN Deployment considerations - Secure design and implementation of VLANs in your network. This article covers key-topics and practices to get the best security and performance out of your VLAN network.

http://www.firewall.cx/networking-topics/vlan-networks/226-vlan-security.html

InterVLAN Routing - Routing between VLAN Networks

This article covers InterVLAN routing. Understand what InterVLAN routing. We examine great detail 4 different methods to perform InterVLAN routing. Servers, routers, switches are all covered as InterVLAN methods.

http://www.firewall.cx/networking-topics/vlan-networks/222-intervlan-routing.html

GFI WebMonitor 2012 Internet Web Proxy Review

GFI Webmonitor Internet web proxy business web monitoring review. We take a look at GFI's latest Webmonitor which promises to provide system admins with top web security features such as site filtering, safe web browsing, monitoring and much more.

http://www.onlywire.com/r/90690876

VLANs - IEEE 802.1q Trunk Link Protocol Analysis

802.1q VLAN tagging analysis. This article analyses the IEEE 802.1q Header tags and fields in great detail with the help of our unique 3D diagrams to help you understand how 802.1q VLAN tagging operates. 802.1q Tagging is widely used in VLAN networks around the world and therefore considered an extremely hot topic all engineers must master.

http://www.firewall.cx/networking-topics/vlan-networks/221-vlan-8021q-analysis.html

VLAN InterSwitch Link (ISL) Protocol Analysis

VLAN - InterSwitch Link (ISL) analysis. This article examines the Cisco propriety ISL frame and analyse its header fields in great depth. Using our easy-to-follow diagrams and analysis you'll understand how an ISL frame is constructed and contents of all fields.

http://www.firewall.cx/networking-topics/vlan-networks/220-vlan-isl-analysis.html