nfd: enable Ethernet face creation

refs #4565

Change-Id: I4f41988c68fc6f4e5b7ede53c96d2103f1ef798d
diff --git a/nfd/debian/nfd.postinst b/nfd/debian/nfd.postinst
index 84463aa..2288926 100644
--- a/nfd/debian/nfd.postinst
+++ b/nfd/debian/nfd.postinst
@@ -23,6 +23,9 @@
 
 chown -R ndn:ndn "/var/lib/ndn/nfd"
 
+# Enable Ethernet face creation
+setcap cap_net_raw,cap_net_admin=eip /usr/bin/nfd
+
 #DEBHELPER#
 
 exit 0