The Dreaded TFTP error 2 (Access Violation)

[Dallas Helquist]

DISCLAIMER: I know nothing about thinclients.  :)

First idea - as root do a /sbin/iptables -F to flush the firewall rules,
then try the thinclient again.  Most likely that will work. I believe the
default "medium" security setting in RH8 blocks most ports.  If that does
not, leave the iptables flushed while you check the following:

The /etc/hosts.allow you show - is that from the server or the client?  If
it is the server, it needs to allow 192.168.100.151 as well.

You should also have a /etc/xinet.d/tftp file.  Edit that and make sure that
disable = no.  If it doesn't, change it and restart xinetd.

Your files should be in the /tftpboot directory.  Looking at your example
below, they should be in /tftpboot/lts.


That is it for my ideas.  If the above doesn't work, look through
/var/log/messages and /var/log/secure for entries relating to tftpd and post
those.

-dallas


----- Original Message -----
From: "George Gambill" <ggambill@computer-guidance.com>
To: <plug-discuss@lists.plug.phoenix.az.us>
Sent: Thursday, December 19, 2002 1:06 PM
Subject: The Dreaded TFTP error 2 (Access Violation)


> The Dreaded TFTP error 2 (Access Violation)
>
> Booting the ThinClient (ws001) form a RH 8 server displays the following
Me:
> Me:  192.168.100.151, Server: 192.168.100.66
> Both are correct indicating DHCP is alive and well
>
> Then comes the dreaded TFTP error 2 (Access Violation) message(s):
>
> Loading 192.168.100.66:/lts/vmlinuz-2.4.19-ltsp-1  .TFTP error 2 (Access
> Violation)
> Unable to load file"
>
> The "Loading 192.168.100.66:/lts/vmlinuz-2.4.19-ltsp-1" portion of the
TFTP
> message looks good.
>
> The ".TFTP error 2 (Access Violation): portion of the TFTP message does
not
> look so good.
> Nor does the "Unable to load file".
>
> /lts/vmlinuz-2.4.19-ltsp-1  is actually in /ltspboot/lts/
> (/ltspboot/lts/vmlinuz-2.4.19-ltsp-1) but the documentation claims this is
> OK.
> Permissions on   /tftpboot/lts/vmlinuz-2.4.19-ltsp-1 are now 655 (I
changed
> them while Easter Egging)
> Permissions on /tftpboot/ are 755
> Permissions on /tftpboot/lts/ are 755
>
> Just in case, I created /lts/ and copied vmlinuz-2.4.19-ltsp-1 to it.  No
> luck.
>
> FYI, this is a simple network, no DNS required, no Router required, only
two
> machines (on of which it ThinClient) one hub, two connections, no outside
> connection.  The server was setup with "medium security" which may be an
> issue (haven't got to that part of the book yet)
>
> /opt/ltsp/i386/etc/lts.conf contains (in part):
>   [default]
>     SERVER  = 192.168.100.66
>   [ws001]
>     XSERVER  = auto
>     USE_NFS_SWAP  = N
>     SWAPFILE_SIZE  = 48m
>     RUNLEVEL  = 5
>
> chkconfig -list | grep tftp shows it on (running).
>
> /etc/hosts contains (in total):
> 127.0.0.1 nowhere localhost.colaldomain localhost
> 192.168.100.66    server
> 192.168.100.151 ws001
>
> /etc/hosts.conf contains (in total):
> order hosts,bind
>
> /etc/hosts.allow contains the following (in total):
>   ALL: 192.168.100.       : ALLOW
>   swat: 126.0.0.1              : ALLOW
>   swat: 192.168.100.        :ALLOW
>   swat:  192.168.100.66   : ALLOW
>   swat:  192.168.100.151  :ALLOW
>   in.tftpd:  192.168.100.66
>   swat:   ALL : DENY
>
> /etc/hosts.deny contains (in total):
>   swat:  ALL EXCEPT 127.0.0.1
>   ALL:  ALL
>
> /etc/xinetd.d/services (contains in part):
>    disable    = yes
>     only_from = 127.0.0.1
> as does /etc/xinetd.d/dervers
>
> /opt/ltsp/i386/etc/;ts/cpnf contains (in part)
> [DEFAULT}
>   SERVER    = 192.168.100.66
> #  DNS_SERVER   = 192.168.100.66
>     SEARCH_DOMAIN  = "cgcltsp.org
>    XSERVER     = auto
>   [ws001]
>     USE_NFS_SWAP   = N
>     SWAPFILE_SIZE   = 48 m
>
> /etc/exports contains (in total):
>     /opt/ltsp/i286 192.168.100.66/255.255.255.0 (no,no_root_squash, sync)
>     /var/opt/ltsp/swapfiles  192.168.100.66/255.255.255.0
> (no,no_root_squash, sync)
>
> Any thoughts would be greatly appreciated.
>
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