Post Views: 1,314 We are always adding to, and updating the technical “how to’s” contained here. When it comes to configuring a new Cisco router, much of the configuration depends on what type of router it is as well as the purpose it will serve. However, there are certain things you should configure on every […]
Top 10 Cisco IOS Classic Commands Read More »
Post Views: 2,725 Welcome to our Cisco IOS Classic Command Cheat Sheet! Cisco switches and routers use the Internetwork Operating System (IOS), which configures and controls the device’s performance and behavior. Cisco’s IOS defines an interface called the Command Line Interface (CLI), which enables administrators to enter commands into a terminal emulation program. The CLI
Cisco IOS Classic Command Cheat Sheet Read More »
Post Views: 1,251 Accessing the Internet is almost taken for granted today by most workers. They get very comfortable simply opening the lid to their laptop, turning on the wireless or connecting a cable and having access. For many of our clients, this notion of “open access” has been a continual challenge. On the one
Switch Port Security Usage in Cisco IOS Read More »
Post Views: 1,889 The Show Environment command can be very helpful to alert you of potential hardware issues. You will need to access this command in global Exec mode. Here are the options available for the Show Environment command: show environment [alarms | all | fans | hardware | last | leds | power-supply |
Show Environment Command in Cisco IOS Read More »
Post Views: 1,904 Point-to-Point (PPP) Protocol is an excelent Layer 2 protocol used to establish a direct connection between two nodes. It can provide connection authentication, transmission encryption (using ECP, RFC 1968), and compression. PPP was designed somewhat after the original HDLC specifications. The designers of PPP included many additional features that had been seen
PPP Configuration in Cisco IOS Read More »
Post Views: 3,707 Whenever we teach our Hands-On courses, we always have a section of the course that discusses troubleshooting the network or technology the class is learning. A key part of troubleshooting any network is knowing the technology, no argument. But even the masters of technologies like Multicasting, or IP Networking, or MPLS, still
Leveraging Logging for Troubleshooting Using Cisco IOS Read More »
Post Views: 2,744 No one wants it to happen but, sooner or later, you will experience a router crash. When you do, you will want to be prepared to save that critical router memory information in order to find out why the router crashed and prevent future crashes. To do this, you need to configure
Core Dump in Cisco IOS Read More »
Post Views: 1,545 A common question folks ask is “How do you check the bandwidth utilization on a router?” It is a great question and the answer is not as easy as you would expect. There are tools that accomplish this (i.e. NetFlow and there is another mentioned at the end of this page). However,
Bandwidth Utilization – How to Check It on Routers Read More »
Post Views: 1,059 In this How To we will reveal how to bypass the system password on Cisco IOS routers. This procedure is used regularly by CellStream consultants. As you will see, we are changing the configuration register to alter the boot process to exclude the configuration files that the router has, as within those
Reload Procedure to Bypass System Password Read More »
Post Views: 1,549 In this How To we will reveal how to bypass the system password on Cisco IOS routers. This procedure is used regularly by CellStream consultants. As you will see, we are changing the configuration register to alter the boot process to exclude the configuration files that the router has, as within those
Reload Procedure to Bypass System Password in Cisco IOS Read More »
Post Views: 2,818 Nmap (“Network Mapper”) is a free and open source (license) utility for network discovery and security auditing that has been around since 1997. Surveillance and network scanning is often one of the first steps in Penetration Testing or Security Validation. Many systems and network administrators also find it useful for tasks such
Getting Started with nmap Read More »
Post Views: 6,497 If you work in WLAN or 802.11, you need this cheat sheet! Think of this as a first level cheat sheet for 802.11 WLAN wireless concepts. This version includes the crucial Wireshark Filters. Now capturing on Wireless LAN’s is a challenge. Check out our articles on this: https://www.cellstream.com/component/tags/tag/monitor-mode You can check out our
802.11 WLAN Wi-Fi Cheat Sheet Read More »
