(1) Please log-in to the machine.
(2) After log-in, type in your terminal
/sbin/ifconfig -a
then press Enter. You'll see output like:
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eth0 Link encap:Ethernet HWaddr XX:XX:XX:XX:XX:XX
inet addr:192.168.130.101 Bcast:192.168.130.255 Mask:255.255.255.0
inet6 addr: fe80::7aac:c0ff:febc:dcb2/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2152998 errors:0 dropped:0 overruns:0 frame:0
TX packets:1616228 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:371166440 (353.9 MiB) TX bytes:1732295849 (1.6 GiB)
Interrupt:20 Memory:fb000000-fb020000
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Please put all of "HWaddr XX:XX:XX:XX:XX:XX" lines into the contact form.
eth0 HWaddr XX:XX:XX:XX:XX:XX
eth1 HWaddr XX:XX:XX:XX:XX:XX
If you don't know much, please put all of output of /sbin/ifconfig command.