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diff --git a/jslinux-2019-12-21/tinyemu-2019-12-21/netinit.sh b/jslinux-2019-12-21/tinyemu-2019-12-21/netinit.sh
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+#!/bin/sh
+#
+# RISCVEMU Ethernet bridge and NAT configuration (run with sudo)
+#
+# Copyright (c) 2017 Fabrice Bellard
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+#
+
+# host network interface connected to Internet (change it)
+internet_ifname="enp0s20f0u1"
+
+# setup bridge interface
+ip link add br0 type bridge
+# create and add tap0 interface to bridge
+ip tuntap add dev tap0 mode tap user $USER
+ip link set tap0 master br0
+
+ip link set dev br0 up
+ip link set dev tap0 up
+ifconfig br0 192.168.3.1
+
+# setup NAT to access to Internet
+echo 1 > /proc/sys/net/ipv4/ip_forward
+# delete forwarding reject rule if present
+#iptables -D FORWARD 1
+iptables -t nat -A POSTROUTING -o $internet_ifname -j MASQUERADE