ip

Blog Post

List open ports and listening services

April 15, 2008 8:47pm PDT

You should turn off any services you don't actually need so that they will not become avenues of attack for security threats. Different systems will have different services running by default,...

2 Latest comment by jackhard

Articles

IP subnetting made easy

June 28, 2006 7:00am PDT

IP network engineers need a solid understanding of how IP subnetting works--yet the subject is often taught so poorly, students wind up completely baffled. George Ou has developed a simple,...

93 Latest comment by Twidget0831

Blog Post

10 commands you should master when working with the Cisco IOS

June 13, 2008 6:33am PDT

Becoming proficient with the Cisco IOS means learning some essential commands. This quick reference describes 10 commands you'll need to rely on when handling various configuration and...

12 Latest comment by career@...

Blog Post

Five free, dead-easy IP traffic monitoring tools

September 21, 2011 1:14pm PDT

When you really need to know what's going on with your network, give one of these free monitors a try.

10 Latest comment by 100coconuts

Blog Post

Quick Tips: Flush the ARP cache in Windows 7

May 12, 2011 11:44am PDT

Jack Wallen shows you how to clear the Address Resolution Protocol cache and how to manage that cache with a few command switches.

6 Latest comment by seanferd

Blog Post

See what process is using a TCP port in Windows Server 2008

October 21, 2008 5:00am PDT

Windows administrators sometimes have to track down network traffic or errant processes and then match that to network traffic. Here are scripts that will aid in the connectivity forensics at the...

20 Latest comment by arjamit

Image Gallery

How to connect an ESXi host to an iSCSI storage target

February 15, 2011 12:00pm PST

Shared storage is the saving grace of vSphere virtualization. In this gallery, virtualization expert Rick Vanover shows you how to add an ESXi host to an iSCSI storage target.

7 Latest comment by ilya.shick@...

Blog Post

DIY SAN: Windows Server 2012 Storage Spaces and iSCSI target

January 16, 2013 6:00am PST

John Joyner shows you how to use Windows Server 2012 to create an iSCSI target and virtual disk that can be used for storage.

7 Latest comment by ascar.omarov@...

Blog Post

How to share a folder in Windows Server 2012

October 11, 2012 9:00am PDT

Scott Lowe reports that there are some slight changes with the file-sharing in Windows Server 2012. Here are the steps for sharing a file in the new version.

2 Latest comment by rick@...

Blog Post

Configure static NAT for inbound connections

June 6, 2007 8:50am PDT

Someone recently asked me how to configure Network Address Translation (NAT) so that computers on the Internet could access his internal Web and mail server through his Cisco router. This requires...

11 Latest comment by osaid.suliebi@...

Blog Post

Set up easy file sharing with NFS on Linux

October 26, 2010 6:25am PDT

Particularly for Windows-less environments where Samba is not needed, NFS is an easy and reliable way to share files between Linux and UNIX systems. Vincent Danen takes you through the setup.

17 Latest comment by techrepublic@...

Blog Post

Mounting NFS volumes in OS X

April 5, 2010 10:45am PDT

Vincent Danen outlines the steps to set up NFS mounts with the Disk Utility GUI in Mac OS X and offers some basic tips on configuration.

9 Latest comment by César

Blog Post

Configure Apache to support multiple SSL sites on a single IP address

October 19, 2009 6:00am PDT

With Apache 2.2.12 and support for the SNI (Server Name Indication) extension to the SSL protocol, you can configure name-based HTTPS sites, just as you can name-based HTTP sites. Vincent Danen...

2 Latest comment by Lunfa

Articles

Cisco administration 101: Five interface commands you should know

August 10, 2006 7:29pm PDT

Whether you're a seasoned admin or a newbie, it's always a good idea to review from time to time. When working with routers and switches, you usually don't have to configure an interface using the...

12 Latest comment by Syed Abdul Ali

Blog Post

Turn your Android tablet into a phone with GrooVe IP

July 16, 2012 10:51am PDT

Jack Wallen shows you how to turn your Android tablet into a phone with the help of the GrooVe IP application.

6 Latest comment by HAL 9000

Blog Post

Exchange 2007: How to allow relay exceptions

October 26, 2007 11:14am PDT

Although allowing unfettered relaying of e-mail through your Exchange 2007 server should be avoided, there are situations in which allowing relaying is desirable. For example, suppose you have an...

7 Latest comment by jcarroll@...

Blog Post

Two simple filters for wireshark to analyze TCP and UDP traffic

March 8, 2012 7:44am PST

Scott Reeves shares the wireshark filters that helps you isolate TCP and UDP traffic.

Articles

Cisco IOS access lists: 10 things you should know

June 16, 2005 7:00am PDT

Access control lists (ACLs) are a fundamental part of working with routers. How much do you know about managing these vital gatekeepers? David Davis lists 10 things every administrator should know...

19 Latest comment by proshantoa@...

Articles

How NetBIOS name resolution really works

March 11, 2003 8:00am PST

NetBIOS alone should not give you many headaches. Unfortunately, when NetBIOS problems occur they can be difficult to detect. Understanding how NetBIOS works is the key.

7 Latest comment by Ayyappan K S

Blog Post

Changing the RDP listening port on Windows Server

December 14, 2009 8:43am PST

IT pro Rick Vanover shows how to change the default port that remote desktop listens on and make subsequent connections in order to make RDP more secure.

22 Latest comment by pdiddyflex