![]() 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. 5 Answers Sorted by: 60 If you just want to find out the MAC address of a given IP address you can use the command arp to look it up, once you've pinged the system 1 time. 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. 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. eth0 is the wired MAC address and wlan0 is the wireless MAC address.I think you're running into what I believe is a serious mis-feature of the isc-dhcp server. Enter the command: ip link show to find the IP address for each device listed.Im able to change the MAC address using the following: sudo ip link set dev eth0 down sudo ip link set dev eth0 address 00:15:5d:35:ea:15 sudo ip link set dev eth0 up. Enter the command: ip addr show to find the IP address for each device listed after inet (most likely after device eth0. Background: Im trying to install Vivado in my WSL2 instance, but its licensing scheme requires a fixed MAC address.ip addr is another command that you could use but you will need to find out the adapter names and the syntax based on your distribution. which could be HWaddr, ether, etc. Note that your Linux distribution may vary with the command and how it lists the MAC address. Enter the command: ifconfig -a to find the list of wired and wireless physical MAC addresses listed by the adapter name.You can find this in your list of applications or by searching for terminal. IP address: Select Ethernet or Wi-Fi to find the IP Address listed under Status, depending on how your device is connected. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |