We all have these at our desks. Not the bluetooth guys for your [tag]phone[/tag] (we could talk about that for a while), but the 900MHz headsets that your company gave you for those long and annoying calls with the boss. These things rocks, but they are oh-so [tag]insecure[/tag]. A coworker who fields support calls has […]
I’ve been looking around at some lists and forums for technical help on Cisco gear, and one thing keeps coming up — people new to [tag]Cisco[/tag] devices don’t know how to look at logs. The [tag]logs[/tag] are your friends and a great tool. You can use them to see what your router is doing, what’s […]
BGP has issues; the main one being transitive [tag]trust[/tag]. [tag]BGP[/tag] works by having networks (companies, providers, etc.) advertise [tag]routes[/tag] that it owns to its peers. These peers pass those routes on to their peers, ad nauseum, until everyone knows what networks everyone has. The big assumption here is that you are advertising only networks for […]
I deployed a Cisco ASA at a location and couldn’t get logged in via SSH. I would get prompted, but, no matter what username/password I put in, it would just reject me. After some digging, it turns out that I forgot this command. aaa authentication ssh console LOCAL When I put this in, it let […]
Back in the day, when I used to put a new piece of IOS-based gear on the network, I would have to go through the gear already in production to remember what all those “little configurations” were that kept the devices running. Guess how many times I remembered to set the NTP server or turn […]
I got my CCNP certification library the other day to finally get myself another cert, so I’ve been doing some reading of late. The thing I hate about certs is that, even if you have all the experience in the world, there’s always a whole mess of academic stuff that no one really knows or […]
That’s nothing compared to this. NetworkWorld has an article by John Cox about the [tag]NFL[/tag]’s Game Day Frequency Coordinators who make sure that everyone at the Super Bowl can use their [tag]wireless[/tag] devices without stepping on toes. Imagine coordinating 2,000 different frequencies for use by everyone from the cleaning crew to the Air Force.
Let’s talk [tag]audit[/tag]ing for a bit. It’s important to have an outside person look over your [tag]configuration[/tag]s every so often to be sure you didn’t do something stupid, so, every quarter or so (mostly so), I bring in someone to…wait a minute. It would cost about $3000 for someone to do that, and the company […]
Let’s set up a scenario. You have a single [tag]router[/tag] that terminates your T1 to the Internet for your company. You serve your own website and email, but you’d like to be as secure as possible and use ACLs on the router to lock stuff down. Your router has two interfaces — S0/0 for the […]
Have you even looked at the first few lines of your [tag]Cisco[/tag] [tag]switch[/tag] or [tag]router[/tag] [tag]config[/tag] and wondered what those “service” lines were? Yeah, me, too, so I did a little research through the web and through some audit tools to figure a few out. Here’s some to pay attention to the next time you’re […]