![]() The advantage of wmic over other tools is that you can access exactly the information you require. Other useful attributes that you could retrieve with wmic are “manufacturer” or “productname.” This query extracts the description and the MAC address from the extensive information that WMI provides about the adapter. It also supports reading the MAC address through the alias NIC: wmic /node:192.168.23.214 NIC get description,macaddress Wmic is a pretty spartan client for WMI queries. Netsh advfirewall firewall set rule group="windows management instrumentation (wmi)" new enable=yes. If you receive the error message “Access denied,” you can configure the firewall with the following command: ![]() Remote access to the PC will only work if its firewall is configured to allow inbound WMI queries. You could redirect the output to a file and then store it in an environment variable with the setx command. In this example, the MAC address of the PC with the IP 192.168.23.214 is displayed in CSV format (parameter /fo csv) and in verbose mode (/v). It is easy to use, supports remote queries, and can display results in a structured format: getmac /s 192.168.23.214 /fo csv /v The built-in Windows tool getmac is the perfect choice for this purpose. Using ipconfig is cumbersome and is not an option if you have to read the MAC addresses remotely. The second call finds all remaining lines with the IDs. The first call of findstr removes all lines with empty MAC addresses. To shorten the search results, you should use a filter: ipconfig /all|findstr /V 00-00-00|findstr Physical This is particularly true if your machine contains multiple (virtual) adapters. To display the MAC address, you have to use the parameter /all, which spits out a clutter of information. In most blogs and forums, ipconfig is recommended for reading the MAC address. No further access to those hardware registers is made.Ipconfig: often recommended but unsuitable As far as I can see, it supports no method of actually asking "what is your PROM Ethernet address" - the MAC address is read out during the "probe1" section of the module initialization, and stored away. I had a quick look at the pcnet32.c drivers (because it's one of the models of network card that I have a rough idea how it works and where the different registers are, etc, so I can see what it does). Of course, there are cases where there isn't a hardware network card for that particular interface - virtual network drivers for virtualization and when using bridges and software switches for example.Īnd of course, the hardware may be such that you can't actually read the "original" MAC address when it has been overwritten by software, because there is only one set of registers for the MAC address itself. The only way to find the original MAC address is to use the same method the network card driver does - unfortunately, I don't believe there is a generic way to tell the driver to provide its MAC address "as provided by the hardware". Memcpy(mac, ifr.ifr_hwaddr.sa_data, IFHWADDRLEN) #include /* for the glibc version number */ I suppose it should be possible to write C code for it, below code gives my current MAC but not the original MAC: #include /* Standard I/O */ Is there any utility or command for that? How do I find the original MAC address? There must be a way to find it, because it is still burned permanently into the card, but I can't find a tool to read the burned in address. Or setting it "permanently" using /etc/sysconfig/network-scripts/ifcfg-eth0. I understand how to find the current MAC address using ifconfig.īut the address can be changed, say by using ifconfig eth0 hw ether uu:vv:ww:yy:xx:zz I'm trying to figure out how to find the original MAC address of an Ethernet NIC on my Linux box. Is it possible to read the MAC address from the NIC directly? I have the code below but it just reads from the layer above but not the card itself.
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