Packet Tracer Cisco Packet Tracer is a powerful network simulation program that allows students to experiment with network behavior and ask “what if” questions. As an integral part of the Networking Academy comprehensive learning experience, Packet Tracer provides simulation, visualization, authoring, assessment, and collaboration capabilities and facilitates the teaching and learning of complex technology concepts. Packet Tracer supplements physical equipment in the classroom by allowing students to create a network with an almost unlimited number of devices, encouraging practice, discovery, and troubleshooting.
Recovery From Corrupt or Missing Software Image on Cisco Catalyst 2900XL and 3500XL Series Switches Introduction This document describes how to recover from a corrupt or missing software image on the Cisco Catalyst 2900XL and 3500XL Series Switches. When this problem exists, the error message error loading flash appears when you boot up after power loss or after an incorrect software upgrade. Note: Trivial File Transfer Protocol (TFTP) may be used to transfer software image files from a PC to your device. This document was written using output from the Cisco TFTP server application. Cisco has discontinued this application and no longer supports it.
ICND1 & ICND2 Central Web Authentication on the WLC and ISE Configuration Example Introduction This document describes a configuration example that is used in order to complete Central Web Authentication (CWA) on the Wireless LAN Controller (WLC). Prerequisites Requirements OpenDNS From DD-WRT Wiki OpenDNS is a free DNS (Domain Name Server) service which makes internet browsing safer and allegedly faster. By simply using their DNS servers instead of your ISP's you are automatically protected from their list of Phishing websites. However, in order to restrict a variety of adult website content you will need to create a free account with them, register your IP address and select the categories you want restricted (i.e. sexuality, nude, pornography, lingerie, grotesque, etc...).
New Ultimate CCNA Challenge for Packet Tracer In this CCNA challenge you will be configuring a small company with two sites Seattle and Tacoma, these sites are connected to the internet and their local intranet domain via a frame relay WAN. There is also a remote home office that connects to the internet and the company intranet via a DSL connection to their local ISP. Configure two VTP domains.Configure multiple VLANs in each VTP domain.Configure VoIP in one of the VTP domains.Configure STP for Seattle VTP domainConfigure NTP.Assign all IP addresses using DHCP.Configure frame relay to connect all the sites.Configure NAT to connect the company to the internet.Configure wireless access to each site.Configure a wireless DMZ zone to allow internet access.Configure ACLs to control access to resources.Configure DSL remote access for the home office.Configure Port Channel.Configure Port Security.Configure TACAS. The ISP router and internet DNS server are already configured. Local Area Network: There are two VTP domains in the network.
10 quick tips to make Linux networking easier Linux makes networking simple and secure -- if you know a few tricks. Jack Wallen shares some pointers to help admins knock out various Linux networking tasks with a minimum of effort. Linux makes networking simple and secure -- if you know a few tricks. Jack Wallen shares some pointers to help admins knock out various Linux networking tasks with a minimum of effort. Networking is a must-have on all levels of computing.
Identity Services Engine Upgrade Guide, Release 1.3 - Before You Begin [Cisco Identity Services Engine] If you encounter a problem, such as network outage or application startup failure, even after sequencing the NICs, check the downloaded version of the bundle. It is possible that you might have downloaded a previous version of the bundle that resulted in the inconsistent state of the NICs. Verify that the bundle has the following MD5 checksum: 76e17877c2fb70d1006a20780fbf5b98. If there is network outage or application startup failure following upgrade, as a result of using an older bundle, you can re-image the failed node with Cisco ISE 1.2 software, register it to the old deployment, and restore the operations backup (if the node had a Monitoring persona). Then, you can attempt to perform the upgrade using the latest bundle again. This recovery step is suitable for a Secondary Administration Node, which is the first node to be upgraded in a deployment.
How to Build a Simple Wireless Authenticated Gateway (SWAG) Using OpenBSD By: Rosli Sukri Now, without spending a lot of money you to can build an authenticated gateway solution to verify your WIFI users. First and foremost you need to get your hands on the coolest free BSD system for firewalls and security devices. In this example I will be using OpenBSD3.6 stock standard as a build and a base system (but I guess you could use FreeBSD5.3 – me thinks the newer FreeBSD are getting a bit bloated but the background fscking, fscking rocks dude!) Once you have installed your neighborhood OS in your server (go ahead and install all the packages from the OpenBSD installation CD, heck I have 40G worth of SATA drive on my brand spanking new Dell 1U server so I don't really care) you only need to change a couple of files within your /etc directory before you can start rocking.