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Add or edit the Firewall Rule for TFTP
The Linux firewall needs to be updated to allow for the TFTP traffic. To do so, switch to the pixi-admin user, open a terminal window, and enter the following three lines, pressing the return key after each line:
sudo iptables -t nat -I PREROUTING -p udp --dport 69 -j REDIRECT --to-port 8069 sudo bash -c "iptables-save > /etc/iptables.up.rules" sudo bash -c "iptables-save > /etc/iptables/rules.v4"
Type the pixi-admin user's password when requested. If you haven't changed the passwords since the server was installed, your server still uses the default admin password.