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The following command set eth0 in promiscuous mode: $ sudo ifconfig eth0 promisc The promisc mode is mostly enabled to monitor network card traffic via tcpdump command or Wireshark. In promiscuous mode is a mode of operation in which every data packet transmitted can be received and read by a network adapter.
#IFCONFIG SHOW MAC ADDRESS HOW TO#
$ sudo ifconfig eth0 up 8) How to enable Promiscuous mode
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$ sudo ifconfig eth0 hw ether 22:67:df:1c:11:4f The following command will change the MAC address for the interface (eth0) using the option hw ether. Alternative commands to change mac address are ip command and 'macchanger' utility. In order to change the MAC address, you should first disable the interface (NIC) and also make sure the hardware vendor supports this function. $ sudo ifconfig eth0 -arp 7) Change MAC address of interface To disable ARP on eth0 interface you have to add a hyphen ( -) before arp option. To enable arp on eth0 interface, use the following command: $ sudo ifconfig eth0 arp 6) How to Disable ARP protocol To add ipv6 address to a interface (etho) use the following syntx: ifconfig inet6 add ipv6address>/prefixlengthįor example, $ sudo ifconfig eth0 inet:0db8:0:f101::1/64 5) How to Enable ARP protocolĪRP stands for the address resolution protocol, it is used for resolution of network layer addresses into link layer addresses. If you looking to set broadcast IP on the interface, use 'ifconfig eth0 broadcast 192.168.1.32' as shown below: $ sudo ifconfig eth0 broadcast 192.168.1.32 4) Set IPV6 Address to network interface You can set both IP address and netmask using one command. The second command set netmask '255.255.255.0' to 'eth0' interface. The following command set IP address '192.168.1.30' to the interface 'eth0'.
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To assign IP address to an interface (eth0), use IP address followed by a specific interface name. To disable interface eth0 run the following command: $ sudo ifconfig eth0 down 3) Assign IP address and Netmask to network interface To enable interface eth0 run the following command: $ sudo ifconfig eth0 up The following command shows to enable and disable specific interface. 2) Enable or disable the network interfaceįor troubleshooting or debugging some system admin have to enable or disable the interface.
#IFCONFIG SHOW MAC ADDRESS FOR MAC#
Note: If you looking for MAC address binded to that interface you can find from the ifconfig output. Iface MTU RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg You can check specific interface (say eth0) details using below command: $ sudo ifconfig eth0 If you want to see all interfaces information (including status up and down) then you have to use -a option. TX packets:3298 errors:0 dropped:0 overruns:0 carrier:0 RX packets:3298 errors:0 dropped:0 overruns:0 frame:0 TX packets:757638 errors:0 dropped:0 overruns:0 carrier:0 RX packets:6053915 errors:0 dropped:11 overruns:0 frame:0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Eth0 Link encap:Ethernet HWaddr 44:87:FC:A4:C5:DD