![]() ![]() MAC addresses can be changed manually with the ifconfig command for tasks such as 'MAC Cloning' that may be required by DSL modems or interface bonding or similar. The name will change if the Ethernet card is replaced or the machine is cloned to new hardware. Obviously this only works for machines on the same subnet. I wasnt able use any of the above answers in my use case so I used the following command to get the ip address of my Ethernet network adapter and echo it as mentioned in the above question. Grep -v 'mac.local #DYN' /etc/hosts > /etc/hosts.new Of course it'll allocate it too as a side effect. With outside help you can do the lookup on the DHCP server this DHCP client for example lets you query any MAC want. NOTE: this works even if they ignore PING packets because they can't ignore the ARP requests that are sent out first. There is even a special command for this arp-scan -localnet which forgets to do the PING. If you try to ping every (local) IP address your arp table arp -a will include all the MAC addresses and their assigned IPs. OTOH, if you really do want the IP address assigned to a particular MAC address the best you're going to do without outside help is to scan the subnet. everything is assigned an IP with dhcp but that IP never changes. That way you have the best of both worlds. The only way I've found to get around this is to make your DHCP server always assign a specific IP address to every device you have. Instead it makes the assumption that are aren't enough IP addresses available and preferentially reuses addresses. But it never uses this information to keep the same devices on stable IP addresses. ![]() ![]() This program records the Ethernet address of every device it has ever seen and the IP address that it assigned to it. Define MAC address A Media Access Control or MAC address is also a uniquely assigned address. If they do, it will cause an IP address conflict. It is also always unique no two devices on the same subnet can have the same IP address. For IPv4 ARP is used to find out which MAC (Layer-2) address belongs to a certain IP (Layer-3) address. MAC addresses are on Layer-2, IP on Layer-3 of the OSI model. If you provide incorrect password, the command would fail with the error message “ Logon failure: unknown user name or bad password.I think you're running into what I believe is a serious mis-feature of the isc-dhcp server. An IP address can be in the format of (IP V4) or abcd:efgh:ijkl:mnop:qrst:uvwx:yzab:cdef (IP V6). On Linux use ip or ifconfig for most Windows look at the driver settings of your network interface. If you try this for a Linux machine you would get the error “ The RPC server is unavailable.” Using getmac command we can retrieve the mac addresses of the machines running windows OS only. You will be prompted to enter the password and the command execution will take place after that. ![]() If you do not want to specify the password, you can skip /p parameter. Just run the command getmac to get the mac addresses. It works on XP, Vista, Windows 7, Server 2003 and Server 2008 operating systems. Below are few examples on how to use this command. This can be used to get mac address for remote computers also. How to convert a MAC address to the corresponding IP address Asked 9 years, 11 months ago Modified 3 years, 7 months ago Viewed 9k times 2 I am looking for an easy way to convert a MAC address to the corresponding IP address in a local network. We can find mac address (physical address) of a computer using the command ‘ getmac‘. ![]()
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