Difference between revisions of "Troubleshoot TFTP"
| Line 20: | Line 20: | ||
== TFTP Service == | == TFTP Service == | ||
| − | '''Fedora''' | + | '''Fedora 20/21''' |
Newer systems: | Newer systems: | ||
| Line 61: | Line 61: | ||
=== Checking/verifying Firewall === | === Checking/verifying Firewall === | ||
| − | '''Disable & Stop Firewall in Fedora 21''' | + | '''Disable & Stop Firewall in Fedora 20/21''' |
<pre>systemctl disable firewalld.service</pre> | <pre>systemctl disable firewalld.service</pre> | ||
<pre>systemctl stop firewalld.service</pre> | <pre>systemctl stop firewalld.service</pre> | ||
Can be undone with "start" and "enable". | Can be undone with "start" and "enable". | ||
| − | '''Check Firewall in Fedora 21''' | + | '''Check Firewall in Fedora 20/21''' |
<pre>systemctl status firewalld.service</pre> | <pre>systemctl status firewalld.service</pre> | ||
| + | |||
| + | '''Fedora 16''' | ||
| + | |||
| + | <pre> | ||
| + | Add /bin/bash to /etc/shells as the vsftpd yum install does not do it correctly causing tftp timeout message | ||
| + | </pre> | ||
| Line 83: | Line 89: | ||
Chain OUTPUT (policy ACCEPT) | Chain OUTPUT (policy ACCEPT) | ||
target prot opt source destination</pre> | target prot opt source destination</pre> | ||
| + | |||
| + | '''Disable Ubuntu Firewall''' | ||
| + | <pre> | ||
| + | sudo ufw disable | ||
| + | </pre> | ||
| + | |||
| + | '''Disable Debian Firewall''' | ||
| + | <pre> | ||
| + | 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 | ||
| + | </pre> | ||
'''Temporarily disable Windows firewall''' | '''Temporarily disable Windows firewall''' | ||
Revision as of 14:38, 15 April 2015
Contents
Testing TFTP
Create a file named test.txt with some content in /tftpboot path of the tftp server
sudo echo "Is my TFTP service working?" > /tftpboot/test.txt
Try to get the file with Linux:
tftp x.x.x.x tftp> get test.txt //Sent 159 bytes in 0.0 seconds tftp> quit cat test.txt
Try to get the file with Windows:
tftp x.x.x.x get test.txt
TFTP Service
Fedora 20/21
Newer systems:
status/enable/start
systemctl status xinetd.service systemctl enable xinetd.service systemctl start xinetd.service
Ubuntu
newer systems:
status/enable/start
sudo service xinetd status sudo service xinetd restart sudo service xinetd enable
older systems:
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
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
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:
