Troubleshooting is about three big things: predicting what can happen, determining the anomalies, and investigating why that anomalies happened. Many network admins break down network infrastructure problems by analyzing the Layer 3 path through the network, hop by hop, in both directions. This process helps them isolate the problem; once they determine which hop in […]
Every admin has made an error while creating a group policy and blew up an important machine. Murphy’s law states that you will then be unable to get the policy to repeal itself on the machine. Well this handy little tip will save the day. delete the following file while you are logged in a […]
Can’t Use apt-get i.e. /boot is 100% full NOTE: this is only if you can’t use apt to clean up due to a 100% full /boot 1. Get the list of kernel images Get the list of kernel images and determine what you can do without. This command will show installed kernels except the currently […]
The 2960G is a great gig switch that is being pulled from corporations and flooding the grey market. The switch is great for home lab use etc. Most people do not know that if you are running a later version of IOS on it it will also do layer 3 routing! this is how you […]
if you spend any time working on networks you are going to come across the need to identify a device connected to a port on a switch. I use primarily cisco equipment and finding the IPs can be quite a pain in the neck if you are searching the mac on the interface then looking […]
On newer generation computers you may have noticed that the windows key sticker is no longer on the bottom or side of the unit. This can make for some frustration when trying to do a clean rebuild. Well chances are the key is stored int he BIOS of the machine and if you are in […]
If you work with Cisco gear then you need to keep your code updated to stay ahead of security pugs with IOS etc. I always forget a command or 2 so I figured I would write it down for myself as well as others. I am going to go over tftp updating using cli as […]
HOWTO: Configure Windows DHCP for Nortel IP telephones In this example we will configure Windows DHCP for Nortel IP telephones. In addition to your standard Option 003 Router you will also need a custom scope option in order for an Nortel IP phone to boot properly using DHCP. 1. Open the DHCP MMC under Control Panel>Administrative Tools>DHCP […]
As many have heard over the past year older versions of SSL have been compromised and should no longer be used by servers to negotiate communications. however disabling these deprecated SSL versions can be a bit of a headache. I would strongly suggest anyone with public facing servers test them to be safe. I personally […]
This applies for Exchange 2010 as well as Exchange 2013. I just tested this out on both and they both work. Essentially we had a problem, users were not smart enough to go to https://owa.domain.com or https://mail.domain.com/owa (Mostly the HTTPS:// part). With this, users can go to “owa.domain.com” or “mail.domain.com/owa” and it will automatically forward […]
