![]() My servers and the machines where I do my troubleshooting are running Windows. from a broadcast ping) into a mac address. How can I determine which device on my network has this IPv6 address? It is often helpful to convert IPv6 link local addresses (e.g. None of the OUI lookup tools recognize it and it doesn't appear in my IPv4 DHCP leases. To use the service, simply input the query in the field below. take the mac address: for example 52:74:f2:b1:a8:7f throw ff:fe in the middle: 52:74:f2:ff:fe:b1:a8:7f reformat to IPv6 notation 5274:f2ff:feb1:a87f convert the first octet from hexadecimal to binary: 52 -> 01010010 invert the bit at index 6 (counting from 0): 01010010 -> 01010000 convert octet back to hexadecimal: 01010000 -> 50. The goal is to provide an easy interface to a multitude of different databases, presenting the data in a format that is fast to read. Netlookup is a service aimed towards computer networking professionals. ![]() I tried that and get the MAC 13:3d:d9:85:94:3b. MAC address vendor lookup - IPv4 / IPv6 lookup - Netlookup. I attempted a crash course in IPv6 and learned that the fe80 prefix means the address is link-local and I can supposedly derive the MAC address from the address. But this network doesn't have a IPv6 DHCP server and arp doesn't seem to speak IPv6. Failing that, I'd ping it, then run arp -a to get its MAC address, which at least gives me the manufacturer. If you want to create a whole IPv6 address from a MAC (and a given prefix), you could use the excellent ipv6calc tool by Peter Bieringer. With an IPv4 device I can look at my DHCP leases to get the device name. I ran tracert and determined it's on the local link and currently online: Tracing route to fe80::113d:d91e:e685:943b over a maximum of 30 hopsġ 9 ms <1 ms 1 ms fe80::113d:d91e:e685:943b I'm a noob when it comes to IPv6 and I've got a machine on my 60+ node network that is part of a malware-spewing botnet. Finally after four days a matching DNS lookup request was made, but to my dismay the request came from the address fe80::113d:d91e:e685:943b. I need to find that device and deal with it, so I enabled logging on my DNS server. My ISP notified me that a device on my network performed a DNS lookup for one of the C&C servers taken offline in the recent law enforcement action against the Avalanche botnet. I've avoided IPv6 until now, but my blissful ignorance must end. Hi everyone,I'm currently facing a challenge during the transition from Windows Server 2012R2 to Windows Server 2022 in our school's IT environment, and I'm reaching out for some advice from the community.Here's our starting situation: we inherited a sing.The Day™ has finally arrived. ![]()
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