If you need to install it again on Ubuntu or another Linux distro featuring the APT package manager, install the dnsutils package: sudo apt install dnsutils Nslookup comes preinstalled on all major operating systems. View hardware-related information about the host. View information about the DNS A address records. Specify the time allowed for the server to respond. When nslookup is given an IP address, it will try to do a PTR lookup.Īs per the other reply, if the IP belongs to a Windows machine, you can also do nbtstat -A 10.31.46.Find all the important nslookup options in the following table. So to get the hostname of 10.11.12.13, we say to DNS "Give me the PTR record for 13.12.11.10.in-addr.arpa." The IP address in the PTR record is reversed.
However, there is no obligation to store PTR records so they may not be present, in which case the lookup will fail. For each IP address, there is a PTR record in which is stored the associated hostname. In DNS this is achieved through PTR records. Once you have the IP address, you are relying on a name resolution service to do a reverse lookup and return a hostname that is associated with an IP.
You can trigger arp requests manually by pinging every IP on the network, or using a utility like nmap to do them all in one go.
In order for this to work, both devices must be on the same layer 2 network - the same switch/vlan. In order to populate that list, the machine will have had to at some point issued an arp request, saying "who has IP x.x.x.x" - the owner will reply and upon receipt, the arp table will be populated. As per the question, arp -a will list the MAC addresses and corresponding IP addresses. This means that you need access to a device that has the IP address associated with the MAC. If you start with a MAC address, you first need to get the IP address.
0 kommentar(er)
