Unlock Your F@st 4353 Modem

Many ISPs lock down their modems, preventing users from changing even basic settings. This guide will help you unlock the Sagemcom Broadband F@st 4353 modem, and it may work for other models as well.

Steps to Unlock Your Modem

1. Log In to Your Modem

First, access your modem’s web interface and open the JavaScript console in your browser.

2. Enable Remote Access

Run the following command in the JavaScript console to enable remote access:

$.xmo.setValuesTree(true, "Device/UserAccounts/Users/User[@uid='6']/RemoteAccesses/RemoteAccess[@uid='2']/Enabled");

3. Assign a Port for Remote Access

Set the remote access port to 22 (default SSH port):

$.xmo.setValuesTree(22, "Device/UserAccounts/Users/User[@uid='6']/RemoteAccesses/RemoteAccess[@uid='2']/Port");

4. Allow All LAN Devices to Access SSH

This step allows all LAN devices to connect without restrictions:

$.xmo.setValuesTree("ACCESS_ENABLE_ALL", "Device/UserAccounts/Users/User[@uid='6']/RemoteAccesses/RemoteAccess[@uid='2']/LANRestriction");

5. Set an SSH Password

Set the SSH password for the assist user:

$.xmo.setValuesTree("assist", "Device/UserAccounts/Users/User[@uid='6']/ClearTextPassword");

6. Reboot Your Modem

Once you reboot, an SSH server will be available on port 22. Log in using:

ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 assist@[GATEWAY_IP]

• Username: assist
• Password: assist
• Once logged in, switch to superuser mode (su) with the root password.

7. Change DNS Servers

You can now modify your modem’s DNS settings with the following command:

xmo-client -s "1.1.1.1" -p 'Device/DHCPv4/Server/Pools/Pool[@uid="1"]/DNSServers'

Conclusion

Congratulations! 🎉 You’ve unlocked your Sagemcom F@st 4353 modem and gained full control over its settings. Now you can customize your network without ISP-imposed restrictions.