[CentOS] [CentOS 5] tftp-server, unable to create new files (even with "-c" option)
Connie Sieh
csieh at fnal.gov
Thu Sep 13 18:46:28 UTC 2007
On Thu, 13 Sep 2007, Grant McChesney wrote:
> On 9/13/07, Davide Grandis <davide.grandis at fastwebnet.it> wrote:
>>
>> Hi all,
>>
>> I'm trying to setup a TFTP server to serve as repository for the
>> config of all my Cisco network devices.
>>
>> As per the the tftpd man, I've added the "-c" option into the /etc/
>> xinetd.d/tftp (as follows) but I still cannot get write access
>> (unless the file is already present).
>>
>> [root at chl1 ~]# cd /etc/xinetd.d
>> [root at chl1 xinetd.d]# cat tftp
>> # default: off
>> # description: The tftp server serves files using the trivial file
>> transfer \
>> # protocol. The tftp protocol is often used to boot diskless \
>> # workstations, download configuration files to network-aware
>> printers, \
>> # and to start the installation process for some operating
>> systems.
>> service tftp
>> {
>> disable = no
>> socket_type = dgram
>> protocol = udp
>> wait = no
>> user = root
>> server = /usr/sbin/in.tftpd
>> server_args = -s -c /tftpboot
>> per_source = 11
>> cps = 100 2
>> flags = IPv4
>> }
>>
>> And here is it concerning the home path owner & permissions:
>>
>> [root at chl1 /]# ls -la
>> ...
>> drwxrwxrwx 2 root root 4096 Sep 13 10:18 tftpboot
>> ...
>> [root at chl1 /]# ls -la tftpboot/
>> drwxrwxrwx 2 root root 4096 Sep 13 10:18 .
>> drwxr-xr-x 25 root root 4096 Sep 13 17:48 ..
>> -rwxrwxrwx 1 nobody nobody 1811552 Sep 12 10:28 c3500xl-c3h2s-mz.
>> 120-5.WC17.bin
>> -rwxrwxrwx 1 nobody nobody 1181 Sep 13 17:51 pippo.config
>>
>> (pippo.config = fake file)
>>
>> This is what I get at the TFTP client side:
>>
>> LabTI-Infra-3524XL-01#copy running-config tftp:
>> Address or name of remote host []? 10.58.2.204
>> Destination filename [labti-infra-3524xl-01-confg]?
>> TFTP: error code 1 received - File not found
>>
>> %Error opening tftp://10.58.2.204/labti-infra-3524xl-01-confg
>> (Undefined error)
>>
>> LabTI-Infra-3524XL-01#
>> LabTI-Infra-3524XL-01#copy running-config tftp:
>> Address or name of remote host []? 10.58.2.204
>> Destination filename [labti-infra-3524xl-01-confg]? pippo.config
>> !!
>> 2327 bytes copied in 0.831 secs
>>
>> So, it means that the TFTP client can only *re-write* an existing
>> file but not creating new ones, and this is the expected behavior if
>> the "-c" parameter is omitted!
>>
>> What am I missing?
>>
>> Any suggestion really appreciated!
>>
>> TIA,
>> Davide
>>
>>
>
> I had this same problem when trying to back up my switch configs. After
> some googling, I found a workaround for RH-based systems. The workaround is
> disable tftp in xinetd, and run in.tftpd manually. I never figured out why
> it would not work with xinetd.
>
Is xinetd installed?
-Connie Sieh
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