From 59fcc1404a9aea01fddf16a314442e3fb3ff33bd Mon Sep 17 00:00:00 2001
From: Pietro Ameruoso <42093926+pameruoso@users.noreply.github.com>
Date: Mon, 24 Apr 2023 20:41:12 +0200
Subject: Update zyxel.md (#155)

* Update zyxel.md

Addeding debrand guidance

* Update zyxel.md

Added link to no-brand firmware compiled by me with some description.

* Update zyxel.md

Added GPL source code provided from Zyxel.

* Update zyxel.md

changing source code package repo to https://github.com/ErnyTech/zyxel-ex5601t0
---
 _sfp_cage/zyxel.md | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/_sfp_cage/zyxel.md b/_sfp_cage/zyxel.md
index ee08f91..f6c46f9 100644
--- a/_sfp_cage/zyxel.md
+++ b/_sfp_cage/zyxel.md
@@ -18,6 +18,35 @@ layout: default
 | SGMII    | ✅                     |
 | Type     | Router                 |
 
+# Flashing a no-brand firmware or firmware downgrade.
+
+1. access via ssh to the router with admin user (admin password is printed on the back of the router)
+2. Disable firmware version and modelcheck by running the following commands
+```
+zycli fwidcheck off
+zycli modelcheck off
+```
+3. You can close the ssh console, do not reboot the router
+4. Open the router web interface and in the maintenance/firmware upgrade section select the "Restore Default Settings After Firmware Upgrade" option.
+5. Select choose file to select the firmware file you want to upload and click Upload.
+6. The router will automatically reboot and should get back up on 192.168.1.1
+
+# FW No-Brand Version V5.70(ACDZ.0)C0 compiled from Zyxel provided OpenSource package.
+The following is a firmware compiled starting from Zyxel provided OpenSource package under GPL license.
+
+- [source GPL package V5.70(ACDZ.0)C0](https://github.com/ErnyTech/zyxel-ex5601t0)
+
+
+--- Use at your own risk!!!! ---
+
+- [Firmware image No-Brand Version V5.70(ACDZ.0)C0](https://mega.nz/file/7FZlWTzQ#F8Q_whoW4h1ETRUAzHe4PXIiK6TVj7uay_OtZxfmR6k)
+
+--- Use at your own risk!!!! ---
+
+The firmware contains the following modifications too:
+
+1. Added start-up script to reset and enable root access via ssh with password "passwd". Do not try to reset the root password because that will last until next reboot.
+2. the /bin path contains sfp_wan.sh_wind and check_sfp_link.sh_wind scripts which are very similar to the standard sfp_wan.sh and check_sfp_link.sh scripts. If everything works with the original ones do not swap them. If you wan to allow 2.5gbit hsgmii with afm0003 and ma5671a you need to swap and enable the "_wind" scripts.
 
 # Miscellaneous Links
 
-- 
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