CISCO MAC ADDRESS PREFIX MAC

That, and the old sysadmin just retired - think of The Bastard Operator From Hell, but in real life, 20 years on. Since they are paid for, why not just leave them up. And when the project was done, a research scientist doesn't want to lose valuable research data. Research scientists and interns deployed them for projects. Instead, I have to root one rack at a time, and guess/research at many of the ages of the systems, which increased the work significantly. I can safely de-rack the 10-30 now, and work on rooting in to the remaining 1-10 yr systems over time. I could use this to further say hey this set is 1-10, this one 10-20 yrs old, and the last set 20-30. This tool was something I wished I had (and searched all over for) to quickly catalog the approximate age of each responding ping. Ancient workstations and servers, such as Sun SPARC's, SGI's, Sun Oracles, HP-UX, AIX, and even a mainframe or 2 that have sat turned on and running an OS and networked (so respond to ping), but are actually lying dormant, stuffed in a closed door rack and networked in (often with long forgotten passwords). In my job, I am cleaning up (maybe more like 95% throwing out than cleaning up) some 30 year old equipment pileup across 4 separate server rooms.

CISCO MAC ADDRESS PREFIX MAC

Maybe we can use this database 'in reverse' to make sure all spoofed MAC addresses look real. Why are you changing your MAC address? We need to investigate you. Or the MAC was issued in 1999 and it's unlikely that you're still using such an old laptop. You used an impossible (never issued) MAC of ef:22:7b:09:09:ba to connect to the Internet. In the iOS screenshot above, we know Wi-Fi Address 92:B1:B8:42:D1:85 is a randomized address, because. The quick synopsis is look at the second character in a MAC address, if it is a 2, 6, A, or E it is a randomized address.

This database will be especially nice for finding people who spoofed their MAC address, and therefore deserve extra scrutiny. There is a bit which gets set in the OUI portion of a MAC address to signify a randomized / locally administered address. You connected with MAC address 3c:45:a3:6a:0d:76 at the coffee shop? That tells us that you were using an HP laptop manufactured in the October to November 2014 timeframe.

OK, if I'm connecting to an ancient CISCO device, I suppose it might be handy to know that it might not support the latest protocols or might need updating.īut I think tracking people and network surveillance are the more likely uses. The only concrete usage example is on the home page where it says: For example, a CISCO device with a MAC prefix assigned in the 1990’s is more than likely an elderly model. The key thing missing from this submission is: What is the intended use?

Cisco mac address prefix