YouAreTheHat's questions

Background: One of our users was recently married and changed her name. Correspondingly, we changed her AD username from jane.doe to jane.smith. However, she now cannot authenticate into any of our Samba shares, which use AD for authentication. Any attempt to access them (as mapped drives on her Windows 7 machine) results in a "user not found" error. However, logging in from a different host allows her to access all the drives just fine.

The Problem: Since the issue is clearly client-side, I am assuming that Windows has cached some old credentials with the pre-marriage username, which it is trying to use to authenticate to the file shares. This leads me to two problems:

1. How would I clear such a cache and force Windows to use the updated credentials?
2. How can this be addressed proactively so that any future name changes don't incur the same trouble?

Additional Details: The clients/workstations all run Windows 7 Pro. All relevant credentials belong to our AD domain, which is a Win 2k8 domain. The file shares are used with Samba 4.1.6 on an Ubuntu box. The Samba server is just a member server for file sharing.

While studying for the CCENT exam, my reference materials have made an alarming number of references to class A/B/C networks. Thankfully they just treat Class A/B/C as shorthand for /8, /16, and /24 CIDR subnets, and don't make any mention of an implicit subnet from the first nibble. Still, it throws me off to have "Class B" pop up in a question or explanation and have to remind myself at every step that there is an implied /16 mask in there.

Is this a convention that is still widely used despite being obsoleted over two decades ago? Am I going to just have to get used to this from my senior admins? And, perhaps most importantly, does Cisco expect its certified technicians/associates/experts to accept and use classful network terminology? (Ignore the last question if it violates Cisco's exam confidentiality policy.)

Update: After switching to a more authoritative reference/study guide, it became clear that Cisco expects knowledge of actual classful networks, insofar as the official study guide dedicates several chapters to them. This makes the question less about the A/B/C terminology and more about if/why admins are expected to know about classful networks.

Hello serverfault community, and thank you in advance for your time.

Summary: I have an IBM x3650, which I bought secondhand (eBay). I am trying to install and run VMWare ESXi 5.5 on it via a USB flash drive, but it will not boot from a USB flash drive. It simply does not give me option anywhere to boot from a USB device.

Details: I have turned on the USB-related option in the BIOS. I have visited the F12 boot device menu, and there is no USB option. I have booted from the ESXi installer CD, which was able to identify both of the flash drives I plugged in, but only after I pulled them out and plugged them back in. The device summary in the BIOS recognizes my mouse and keyboard in any port, but never sees any other connected USB devices.

Models, versions, etc: Server chassis identifies itself as a 797961U, but motherboard is different from the one in IBM's 7979 User Manual. It is running BIOS v1.19 (latest that I can find). I have tried a Kingston Datatraveler and Sandisk Cruzer Fit. I have tried all 6 external USB ports. There is no internal USB port on this model.

Question: Has anyone else had this issue? Is there a way of tackling this that I haven't considered? Do I have any recourse through IBM with a secondhand server?

serverfault community.

What I would like: to determine the current IP of a host (a networked camera to be specific)

What I have: its MAC, its previously documented hostname and IP

What I have done: ping the IP, ping the hostname, check the DHCP leases, check the DNS records, check the ARP table, ping the subnet broadcast then check the ARP table, try the IP in a browser

The short story: This device was previously configured, then an office relocation took it out of the network. I would like to reintegrate it, ideally with its previous configuration intact.

The details: The camera was configured as 10.25.22.37 (or .38), on a /24 subnet, on a particular VLAN. It has a documented hostname. I have access to all the network devices it might feasibly be going through. I have confirmed that it is on the same VLAN as my laptop, and according to the documented configuration, it should be on the same subnet as well.

The problem: I still cannot find any trace of it, other than its MAC showing on the correct port of a managed switch.