[NTLUG:Discuss] tftp server administratively unavailable

[Robert Thompson]

 > ICMP message was Type 3 -  Destination Unreachable, and
 > Code 10 - Host administratively  prohibited.

Those ICMP codes are network error messages, so don't have anything to 
do with the TFTP application or file permissions. ICMP errors are done 
on a lower layer than the TFTP daemon, ie the network stack before the 
traffic even hits the filesystem. The 'admin prohibited' usually means 
that there's a firewall involved and that traffic is forbidden to travel 
to that IP (ie an admin has configured a firewall to prohibit the 
traffic to that host).

 > remember tftp is 69/udp, so make sure your FW on the host is opened
 > properly.

Yep, make sure port 69/udp is open and allowed through all devices on 
the path.

=-= Robert Thompson


MadHat wrote:

> 
> On Jul 7, 2005, at 2:27 PM, Dennis Rice wrote:
> 
>> I am trying to set up a tftp server for maintaining router  
>> configuration information.  The configuration is simple, but the  
>> problem is when I attempt to write a file to it.  System is FC3.
>>
>> When coping the data to the server from the router (cisco), I get  the 
>> return message of "destination unreachable".  I have modified  the 
>> directory and file to rwx for u/g/o (make it work, then secure).
>>
>> Using ethereal, I found that the return ICMP message was Type 3 -  
>> Destination Unreachable, and Code 10 - Host administratively  prohibited.
>>
>> I enterpret this as meaning that the user is restricted, but by  what 
>> I do not understand.  Would appreciate suggestions as to what  I can 
>> look at.
> 
> 
> remember tftp is 69/udp, so make sure your FW on the host is opened  
> properly.
> 
> -- 
> MadHat (at) Unspecific.com, C²ISSP
> E786 7B30 7534 DCC2 94D5  91DE E922 0B21 9DDC 3E98
> gpg --keyserver wwwkeys.us.pgp.net --recv-keys 9DDC3E98
> 
> 
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