Difference between revisions of "Tftp"
From Klaus' wiki
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| − | To enable tftp on your Centos server perform the following: | + | To enable tftp on your Centos server perform the following as '''root''': |
<source lang="bash"> | <source lang="bash"> | ||
| Line 5: | Line 5: | ||
$ chmod 777 /tftpboot | $ chmod 777 /tftpboot | ||
$ vi /etc/xinetd.d/tftp ## Change disable = yes to disable = no | $ vi /etc/xinetd.d/tftp ## Change disable = yes to disable = no | ||
| − | $ restorecon -r /tftpboot | + | $ /sbin/restorecon -r /tftpboot |
$ system-config-securitylevel-tui ## add tftp:udp in the customize menu for other ports | $ system-config-securitylevel-tui ## add tftp:udp in the customize menu for other ports | ||
$ service network restart | $ service network restart | ||
$ service xinetd restart | $ service xinetd restart | ||
| − | |||
| − | |||
| − | |||
$ echo "test">/tftpboot/test | $ echo "test">/tftpboot/test | ||
$ tftp localhost ## command: get test | $ tftp localhost ## command: get test | ||
| Line 18: | Line 15: | ||
check that the file test is received locally. | check that the file test is received locally. | ||
| − | + | Unfortunately we cannot test this from bren because the tftp implementation are using random selected ports. | |
| + | |||
| + | +-------------+ +--------------+ | ||
| + | | | | | | ||
| + | | | port xx | | | ||
| + | | bren |----------------------->| devhost | | ||
| + | | | port 69/udp | | | ||
| + | | | | | | ||
| + | +-------------+ +--------------+ | ||
| + | |||
| + | +-------------+ +--------------+ | ||
| + | | | | | | ||
| + | | | port xx | | | ||
| + | | bren |<-----------------------| devhost | | ||
| + | | | port nn | | | ||
| + | | | | | | ||
| + | +-------------+ +--------------+ | ||
| + | where nn is randomly selected and with almost 100% certainty not open in the bren firewall. | ||
| + | (Remember: The source port (xx) does not cause any problems.) | ||
| + | |||
| + | If you have a PC with fully open firewall you can test the setup - maybe momentary switch off your firewall for the test - provided you have a tftp client installed on your PC. | ||
| + | |||
| + | The EA 2478 board '''will''' work under these conditions, because uBoot accepts incoming tftp traffic on any port. | ||
Latest revision as of 10:47, 27 February 2013
To enable tftp on your Centos server perform the following as root:
$ yum install tftp* $ chmod 777 /tftpboot $ vi /etc/xinetd.d/tftp ## Change disable = yes to disable = no $ /sbin/restorecon -r /tftpboot $ system-config-securitylevel-tui ## add tftp:udp in the customize menu for other ports $ service network restart $ service xinetd restart $ echo "test">/tftpboot/test $ tftp localhost ## command: get test
check that the file test is received locally.
Unfortunately we cannot test this from bren because the tftp implementation are using random selected ports.
+-------------+ +--------------+ | | | | | | port xx | | | bren |----------------------->| devhost | | | port 69/udp | | | | | | +-------------+ +--------------+ +-------------+ +--------------+ | | | | | | port xx | | | bren |<-----------------------| devhost | | | port nn | | | | | | +-------------+ +--------------+ where nn is randomly selected and with almost 100% certainty not open in the bren firewall. (Remember: The source port (xx) does not cause any problems.)
If you have a PC with fully open firewall you can test the setup - maybe momentary switch off your firewall for the test - provided you have a tftp client installed on your PC.
The EA 2478 board will work under these conditions, because uBoot accepts incoming tftp traffic on any port.
