[*] OpenWrt problem with tftp

[Hitesh Sharma]

Well..

TFTP is not nat friendly... If the port 1024-1029 are blocked by any ISP or port 69 is not open... then tftp will not work.
however, with the nature of the message John is getting, seems like xinetd is refusing the connection to tftp server on OpenWrt
Add to hosts.allow tftp: ALL..

It should work 

Hitesh
----- Original Message ----- 
  From: Sean Walberg 
  To: Asterisk Open Source PBX SIG 
  Sent: Thursday, May 18, 2006 7:41 PM
  Subject: Re: [*] OpenWrt problem with tftp


  xinetd uses tcp wrappers (/etc/hosts.{allow,deny}), plus any statements in /etc/xinetd.d/tftp even though it's a UDP service...  Are you denying it somehow through there?

  I'm pretty sure tftp is NAT friendly.  Since it's hitting syslog, my guess is the wrappers config. 

  Sean


  On 5/18/06, John Lange <john.lange at open-it.ca> wrote:
    I believe that I'm having a problem with the OpenWRT and tftp.

    I'm trying to fetch a file outside of the OpenWRT firewall using tftp
    but on the server side I see these messages:

    in.tftpd[26104]: tftpd: read(ack): Connection refused 

    The client just times out.

    I suspect its a nat issue with the OpenWRT perhaps related to the fact
    the OpenWRT listens on a tftp port for uploads of firmware?

    Or is tftp generally tricky through nat? I can't see why it would be. 

    Is there some kind of iptables parameter that needs to be added? Scant
    little comes up on google for iptables, nat and tftp.

    --
    John Lange
    OpenIT ltd. www.Open-IT.ca (204) 885 0872
    VoIP, Web services, Linux Consulting, Server Co-Location

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  -- 
  Sean Walberg <sean at ertw.com >    http://ertw.com/ 


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