libxt_mac.man revision fb6ef49a4d3cac528b78332977c903397e6137d2 
1.TP
2.BR "--mac-source " "[!] \fIaddress\fP"
3Match source MAC address.  It must be of the form XX:XX:XX:XX:XX:XX.
4Note that this only makes sense for packets coming from an Ethernet device
5and entering the
6.BR PREROUTING ,
7.B FORWARD
8or
9.B INPUT
10chains.
11