TFTP server

Reminder

• TFTP requires a DHCP server
• TFTP is NOT secure at all. You should only use it into your internal network !!

=> Don't forget to adjust your firewall rules

Installation

Trivial FTP (TFTP) client

apt-get install tftp-hpa

Trivial FTP (TFTP) server

apt-get install tftpd-hpa

SysLinux [netboot utilities]

apt-get install syslinux mtools initramfs-tools

Syslinux contains some starter files you can use for your netboot clients.

Basic configuration

Create target TFTP folders

mkdir -m 755 -p /tftpboot

TFTP configuration

vim /etc/default/tftpd-hpa

It should look like:

# /etc/default/tftpd-hpa
RUN_DAEMON="yes"
TFTP_USERNAME="tftp"
TFTP_DIRECTORY="/tftpboot"
TFTP_ADDRESS="0.0.0.0:69"
TFTP_OPTIONS="--secure"

Don't forget to add the RUN_DAEMON setting.

The TFTP server files [= the files that will be used by the TFTP clients] are in the "TFTP_DIRECTORY" instruction. ==> You should use the folder we just created: /tftpboot

IMPORTANT !!

You must not change the default user or port number !!

service tftpd-hpa restart

TFTP automatic start on boot

Sometimes the "RUN_DAEMON" is not enough for TFTP automatic startup... :(

In that case you have to register tftp-hpa as a service.

cd /etc/init.d/
update-rc.d tftpd-hpa defaults

Reboot your server ! The TFTP should be up and running now :)

Firewall configuration

Adjust your firewall script and add the following rules:

IPTABLES=`which iptables`
LAN_ADDRESS="172.16.50.0/24"

$IPTABLES -A INPUT -p udp -s $LAN_ADDRESS --dport 69 -j ACCEPT

Test the server

1. Create a file on the server

vim /tftpboot/hello.txt

2. Connect to the server

Install TFTP client:

apt-get install tftp-hpa

Connect to the server and get file:

in that example 172.16.50.2 is my server

tftp 172.16.50.2
get hello.txt
quit

Check the received file:

cat hello.txt

TFTP service management

Just use the "service" command:

service tftpd-hpa {status|restart|start|stop}

Setup NetBoot files

See NetBoot server