diff --git a/postplug.d/20network b/postplug.d/20network
index cf69faf..237ef55 100644
--- a/postplug.d/20network
+++ b/postplug.d/20network
@@ -59,45 +59,86 @@ _EOF
 
 function cdc_usb() {
    local CDC_IPADDR=10.99.99.1
+   local CDC_SUBNET=10.99.99.0
+   local CDC_RANGE_FROM=10.99.99.100
+   local CDC_RANGE_TO=10.99.99.199
+   local CDC_NETMASK=255.255.255.0
 
    ifconfig usb0 &>/dev/null && {
+      [ "$NETWORK_CDC_NETMASK" ] && CDC_NETMASK=$NETWORK_CDC_NETMASK
       [ -e $network_devices/ifcng-usb0 ] || {
          [ "$NETWORK_CDC_IPADDR" ] && CDC_IPADDR=$NETWORK_CDC_IPADDR
          cat > $network_devices/ifcfg-usb0 << _EOF
 DEVICE=usb0
 BOOTPROTO=none
 IPADDR=$CDC_IPADDR
+NETMASK=$CDC_NETMASK
 ONBOOT=yes
 NM_CONTROLLED=no
 _EOF
       }
+      [ -e /etc/dhcpd-usb0.conf ] || {
+         [ "$NETWORK_CDC_SUBNET" ] && CDC_SUBNET=$NETWORK_CDC_SUBNET
+         [ "$NETWORK_CDC_RANGE_FROM" ] && CDC_RANGE_FROM=$NETWORK_CDC_RANGE_FROM
+         [ "$NETWORK_CDC_RANGE_TO" ] && CDC_RANGE_TO=$NETWORK_CDC_RANGE_TO
+         cat > /etc/dhcpd-usb0.conf << _EOF
+# Created by postplug
+subnet $NETWORK_CDC_SUBNET netmask $NETWORK_CDC_NETMASK {
+   range dynamic-bootp $NETWORK_CDC_RANGE_FROM $NETWORK_CDC_RANGE_TO;
+}
+_EOF
+      }
+      ifup usb0
+      touch /var/lib/dhcp/dhcpd-usb0.leases
+      /sbin/dhcpd -q usb0 -pf /run/dhcpd-usb0.pid -cf /etc/dhcpd-usb0.conf -lf /var/lib/dhcp/dhcpd-usb0.leases
    }
 }
 
 function android_usb() {
    local ANDROID_IPADDR=10.99.99.1
    local ANDROID_ETHADDR=80:00:60:0F:E8:00
+   local ANDROID_SUBNET=10.99.99.0
+   local ANDROID_RANGE_FROM=10.99.99.100
+   local ANDROID_RANGE_TO=10.99.99.199
+   local ANDROID_NETMASK=255.255.255.0
 
    # FIXME: hardcoded values
    if [ -e /sys/class/android_usb/android0 ]; then
       [ "$NETWORK_ANDROID_ETHADDR" ] && ANDROID_ETHADDR=$NETWORK_ANDROID_ETHADDR
+      [ "$NETWORK_ANDORID_NETMASK" ] && ANDORID_NETMASK=$NETWORK_ANDORID_NETMASK
       echo 0 > /sys/class/android_usb/android0/enable
       echo rndis,acm > /sys/class/android_usb/android0/functions
       echo 2 > /sys/class/android_usb/android0/f_acm/instances
       echo $ANDROID_ETHADDR > /sys/class/android_usb/android0/f_rndis/ethaddr
       echo 2d01 > /sys/class/android_usb/android0/idProduct
       echo 1 > /sys/class/android_usb/android0/enable
-   fi
-   [ -e $network_devices/ifcfg-rndis0 ] || {
-      [ "$NETWORK_ANDROID_IPADDR" ] && ANDROID_IPADDR=$NETWORK_ANDROID_IPADDR
-      cat > $network_devices/ifcfg-rndis0 << _EOF
+
+      [ -e $network_devices/ifcfg-rndis0 ] || {
+         [ "$NETWORK_ANDROID_IPADDR" ] && ANDROID_IPADDR=$NETWORK_ANDROID_IPADDR
+         cat > $network_devices/ifcfg-rndis0 << _EOF
 DEVICE=rndis0
 BOOTPROTO=none
 IPADDR=$ANDROID_IPADDR
+NETMASK=$ANDROID_NETMASK
 ONBOOT=yes
 NM_CONTROLLED=no
 _EOF
-   }
+      }
+      [ -e /etc/dhcpd-rndis0.conf ] || {
+         [ "$NETWORK_ANDROID_SUBNET" ] && ANDROID_SUBNET=$NETWORK_ANDROID_SUBNET
+         [ "$NETWORK_ANDROID_RANGE_FROM" ] && ANDORID_RANGE_FROM=$NETWORK_ANDROID_RANGE_FROM
+         [ "$NETWORK_ANDROID_RANGE_TO" ] && ANDROID_RANGE_TO=$NETWORK_ANDROID_RANGE_TO
+         cat > /etc/dhcpd-rndis0.conf << _EOF
+# Created by postplug
+subnet $ANDROID_SUBNET netmask $ANDROID_NETMASK {
+   range dynamic-bootp $ANDROID_RANGE_FROM $ANDROID_RANGE_TO;
+}
+_EOF
+      }
+      ifup rndis0
+      touch /var/lib/dhcp/dhcpd-rndis0.leases
+      /sbin/dhcpd -q rndis0 -pf /run/dhcpd-rndis0.pid -cf /etc/dhcpd-rndis0.conf -lf /var/lib/dhcp/dhcpd-rndis0.leases
+   fi
 }
 
 [ "$NETWORK_CDC_DISABLE" = "1" ] || cdc_usb
diff --git a/sysconfig/postplug b/sysconfig/postplug
index 24a1a5c..b7a85fb 100644
--- a/sysconfig/postplug
+++ b/sysconfig/postplug
@@ -31,13 +31,23 @@ FS_NO_DEV_REMOVE=yes
 NETWORK_NEWDEVICE=off
 
 # network parameters for CDC ethernet interface
+# (default: enabled)
 #NETWORK_CDC_DISABLE=1
 #NETWORK_CDC_IPADDR=10.99.99.1
+#NETWORK_CDC_SUBNET=10.99.99.0
+#NETWORK_CDC_RANGE_FROM=10.99.99.100
+#NETWORK_CDC_RANGE_TO=10.99.99.199
+#NETWORK_CDC_NETMASK=255.255.255.0
 
 # network parameters for Android rndis ethernet interface
+# (default: enabled)
 #NETWORK_ANDROID_DISABLE=1
 #NETWORK_ANDROID_IPADDR=10.99.99.1
 #NETWOKR_ANDROID_ETHADDR=01:02:03:04:05:06
+#NETWORK_ANDROID_SUBNET=10.99.99.0
+#NETWORK_ANDROID_RANGE_FROM=10.99.99.100
+#NETWORK_ANDROID_RANGE_TO=10.99.99.199
+#NETWORK_ANDROID_NETMASK=255.255.255.0
 
 # xorg server: automatically add DRI section
 # (on/off, default: on)