Upgrade Cisco IOS in a Router or a Switch

upgrading IOS on Cisco routers and switches is hightly recommendable because of the following reasons Patch critical vulnerabilities: Just like any other network device or application, Cisco routers and switches are also prone to security holes. And because routers and switches are critical to network infrastructure, you should plug these security holes as soon as […]
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Access Network When Everything Else is Blocked Using ptunnel

Ptunnel is an application that allows you to reliably tunnel TCP connections to a remote host using ICMP echo request and reply packets, commonly known as ping requests and replies. At first glance, this might seem like a rather useless thing to do, but it can actually come in handy in some cases. The following […]
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Howto Setup Cisco Router Auxiliary,Console and Telnet Passwords

There are five passwords used to secure your Cisco routers: console, auxiliary, telnet (VTY),enable password, and enable secret. Just as you learned earlier in the chapter, the first two passwords are used to set your enable password that’s used to secure privileged mode. This will prompt a user for a password when the enable command […]
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