Posted by Admin on 18th June 2008
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If you want to upgrade IOS on a 3750 switch stack follow this procedure
There are some new IOS commands to automate upgrading of a stack, but I use the familiar manual method.
Posted in Network | 3 Comments »
Posted by Admin on 28th May 2008
If you are using zoneedit.com or dyndns.org for your DNS service so that you can access your server using a URL, then you might have to update your DNS record at the service periodically whenever the IP address of your computer changes.Now here is simple solution for this ddclient.
Posted in Network | 1 Comment »
Posted by Admin on 9th February 2008
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 possible.
Posted in Network | 5 Comments »
Posted by Admin on 29th January 2008
If you want to ensure that only a certain device—for example, a server—is plugged into a particular switch port, you can configure the MAC address of the server as a static entry associated with the switch port.
Posted in Network | No Comments »
Posted by Admin on 16th January 2008
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 example illustrates the main motivation in creating ptunnel:
Posted in Network, Security | 1 Comment »
Posted by Admin on 18th December 2007
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 is used. The other three are used to configure a password when user mode is accessed either through the console port, through the auxiliary port, or via Telnet.
Posted in Network | 2 Comments »
