1This module matches on the bridge port input and output devices enslaved 2to a bridge device. This module is a part of the infrastructure that enables 3a transparent bridging IP firewall and is only useful for kernel versions 4above version 2.5.44. 5.TP 6[\fB!\fP] \fB\-\-physdev\-in\fP \fIname\fP 7Name of a bridge port via which a packet is received (only for 8packets entering the 9.BR INPUT , 10.B FORWARD 11and 12.B PREROUTING 13chains). If the interface name ends in a "+", then any 14interface which begins with this name will match. If the packet didn't arrive 15through a bridge device, this packet won't match this option, unless '!' is used. 16.TP 17[\fB!\fP] \fB\-\-physdev\-out\fP \fIname\fP 18Name of a bridge port via which a packet is going to be sent (for bridged packets 19entering the 20.BR FORWARD 21and 22.B POSTROUTING 23chains). If the interface name ends in a "+", then any 24interface which begins with this name will match. 25.TP 26[\fB!\fP] \fB\-\-physdev\-is\-in\fP 27Matches if the packet has entered through a bridge interface. 28.TP 29[\fB!\fP] \fB\-\-physdev\-is\-out\fP 30Matches if the packet will leave through a bridge interface. 31.TP 32[\fB!\fP] \fB\-\-physdev\-is\-bridged\fP 33Matches if the packet is being bridged and therefore is not being routed. 34This is only useful in the FORWARD and POSTROUTING chains. 35