Difference between revisions of "Troubleshoot TFTP"

From FOG Project
Jump to: navigation, search
Line 3: Line 3:
  
  
'''Create a file''' named test.txt with some content in /tftpboot path of the tftp server
 
<pre>sudo echo "Is my TFTP service working?" > /tftpboot/test.txt</pre>
 
  
 
'''Try to get the file with Linux:'''
 
'''Try to get the file with Linux:'''
 
<pre>tftp x.x.x.x
 
<pre>tftp x.x.x.x
tftp> get test.txt
+
tftp> get undionly.kpxe
//Sent 159 bytes in 0.0 seconds
+
//Sent xxx bytes in 0.0 seconds
tftp> quit
+
tftp> quit</pre>
cat test.txt</pre>
 
  
 
'''Try to get the file with Windows:'''
 
'''Try to get the file with Windows:'''
<pre>tftp x.x.x.x get test.txt</pre>
+
<pre>tftp x.x.x.x get undionly.kpxe</pre>
  
  

Revision as of 14:44, 15 April 2015

Testing TFTP

Try to get the file with Linux:

tftp x.x.x.x
tftp> get undionly.kpxe
//Sent xxx bytes in 0.0 seconds
tftp> quit

Try to get the file with Windows:

tftp x.x.x.x get undionly.kpxe


TFTP Service

Fedora 20/21

Newer systems:

status/enable/restart

systemctl status xinetd.service
systemctl enable xinetd.service
systemctl restart xinetd.service

Ubuntu

newer systems:

status/enable/restart

sudo service xinetd status
sudo service xinetd restart
sudo service xinetd enable

older systems:

status/enable/restart

sudo /etc/init.d/xinetd status
sudo /etc/init.d/xinetd restart
sudo /etc/init.d/xinetd enable


Troubleshooting TFTP

To test from windows, TFTP Client must be installed and the Firewall must allow TFTP Traffic.

Control Panel -> Programs and Features -> Turn Windows Features on or off -> TFTP Client

TFTP Client in Windows.png




Checking/verifying Firewall

Disable & Stop Firewall in Fedora 20/21

systemctl disable firewalld.service
systemctl stop firewalld.service

Can be undone with "start" and "enable".

Check Firewall in Fedora 20/21

systemctl status firewalld.service

Fedora 16

Add /bin/bash to /etc/shells as the vsftpd yum install does not do it correctly causing tftp timeout message


Check Firewall in Debian/Ubuntu

sudo iptables -L

If disabled, the output should look like this:

Chain INPUT (policy ACCEPT)
target prot opt source destination 

Chain FORWARD (policy ACCEPT)
target prot opt source destination 

Chain OUTPUT (policy ACCEPT)
target prot opt source destination

Disable Ubuntu Firewall

sudo ufw disable

Disable Debian Firewall

iptables -F
iptables -X
iptables -t nat -F
iptables -t nat -X
iptables -t mangle -F
iptables -t mangle -X
iptables -P INPUT ACCEPT
iptables -P OUTPUT ACCEPT
iptables -P FORWARD ACCEPT

Temporarily disable Windows firewall

TFTP Windows Firewall.png


Permissions

Check permissions on /tftpboot directory by using:

ls -ld /tftpboot

Check permissions on files in /tftpboot directory by using:

ls -ld /tftpboot/*.*

Set permissions to allow everyone full access to /tftpboot and all contents:

chmod -R 777 /tftpboot

See example permissions below:

TFTP Permissions.png