Posted on in Networking
If you've ever needed to reset a Cisco Catalyst switch to it's factory default (locked out, perhaps?), you've probably spent some time digging around on Cisco's web site. The Catalyst password recovery procedure starts off by reseting the Catalyst to it's original factory settings. Below, I'm going to give you …
Posted on in Networking
If you're interested in DHCP Option 82 in your Cisco Catalyst-based network, you'll be happy to know that the configuration can be summed up in 4 easy steps.
ip dhcp snooping. Although we're only turning this on to get …Posted on in Software
Someone looked over my shoulder the other day and was blown away by my MySQL client prompt.
(slap@localhost) [slaptijack]>
The boring default client just acknowledges that you are using MySQL and nothing more. This prompt indicates your username, the server you are working on, and the database you are …
Posted on in Networking
How many times has this happened to you?
SLAP#write memory
startup-config file open failed (Device or resource busy)
If you work in an environment where multiple users have enable access on Cisco devices, you've probably seen it more than once. This particular error is caused when another user has …
Posted on in System Administration
This post relates to pre-Leopard versions of Mac OS X. Unfortunately, Leopard hosts that are configured via DHCP use the DHCP assigned DNS server before any statically configured servers. Check out the next post in this series to find the necessary tweaks for Leopard.
If you've been following along in …
Posted on in System Administration
If you've ever had to administer a Mac OS X system from afar, you know how difficult it can be to manage network settings. The Network Preference Panel under System Preferences is a great tool if you have remote access to the <acronym title="Graphical User Interface">GUI</acronym>, but …
Posted on in System Administration
While doing further research for my OS X Caching Only Name Server series, it has come to my attention that a couple of my methods (specifically relating to Startup Items and starting the daemon) are outdated. Although these methods may have been acceptable in pre-Tiger versions of OS X, Mac …
Posted on in Graphics Design
Welcome to post #100! Since this is a bit of a milestone, I thought I'd put up a super chart.
The image below shows the grow of RSS subscribers over the last 100 posts.
Although the growth is modest, I think its impressive considering this site has lived between Google …
Posted on in System Administration
This information is really geared for pre-Tiger versions of OS X. In OS X 10.4 (Tiger), the BIND daemon is controlled by launchd and is pre-configured (although disabled). BIND Startup in Mac OS X 10.4 (Tiger) has more detailed information. Although outdated, this article still includes useful information …
Posted on in System Administration
Before we can start running BIND on OS X, we have to make a few configuration changes. Although BIND is pre-installed in Mac OS X 10.4 (Tiger), it's not ready to run right out of the box. We've already created our Startup Item, but now we need to cleanup …
Posted on in System Administration
This information is really geared for pre-Tiger versions of OS X. In OS X 10.4 (Tiger), the BIND daemon is controlled by launchd and is pre-configured (although disabled). BIND Startup in Mac OS X 10.4 (Tiger) has more detailed information. Although outdated, this article still includes useful information …
Posted on in System Administration
By default, Mac OS X 10.4 (Tiger) comes with BIND 9 pre-installed and pre-configured to operate in caching-only mode. Unfortunately, the operating system is not configured to start the server at boot time, or even use the server if it was running. In this series of articles, we'll create …
Posted on in Software
By default, a BIND DNS server will report which version it is running to anyone that's interested. All it takes is a simple lookup of the version.bind text record in the chaos class of your server. Check this out:
Skadi:~ slap$ dig version.bind txt chaos @localhost
; <<>> DiG 9 …Posted on in Software
It's recently come to my attention that a large percentage of the Slaptijack site has ended up in the dreaded "Google Supplemental Index". This means that key pages are not being served during normal searches. You can see which pages are in the Supplemental Index by running the following search …
Posted on in Networking
DS3 (also known as T3) scrambling is not an issue that comes up very often. It's something every network administrator should know about, though. After all, it just might save your bacon.
Some physical layer protocols depend on the transition from 1 to 0 in a frame to maintain clocking …
