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| Java Jive to All |
| Problems with tftp & tftpd on Ubuntu 22, |
| 16 May 25 13:03:13 |
XPost: uk.comp.os.linux
From: java@evij.com.invalid
As per title, I can get neither tftp or tftpd - at least I think
neither but it's difficult to be sure - to work under Ubuntu 22. After
some initial difficulties, I decided to uninstall and reinstall. Upon
reinstallation, I received a warning that the file '/etc/inetd.conf' did
not exist so I uninstalled them both again, 'touch'ed to create an empty
'/etc/inetd.conf', and then reinstalled again, this time without undue
warnings. The two config files now read as follows ...
user@Computer:/home$ cat /etc/inetd.conf
tftp dgram udp wait nobody /usr/sbin/tcpd /usr/sbin/in.tftpd /srv/tftp
user@Computer:/home$ cat /etc/xinetd.d/tftp
service tftp
{
protocol = udp
port = 69
socket_type = dgram
wait = yes
user = nobody
server = /usr/sbin/in.tftpd
server_args = /home/tftpboot
disable = no
}
... and, to be sure the firewall isn't the problem, ...
user@Computer:/home$ sudo ufw status
Status: inactive
... then ...
user@Computer:/home$ sudo service xinetd restart
... and syslog looks alright to my eyes at least ...
user@Computer:/home$ tail -50 /var/log/syslog
[...]
May 16 11:37:41 Computer systemd[1]: Stopping LSB: Starts or stops the
xinetd daemon....
May 16 11:37:41 Computer xinetd[1925]: * Stopping internet superserver
xinetd
May 16 11:37:41 Computer xinetd[1909]: Exiting...
May 16 11:37:41 Computer xinetd[1925]: ...done.
May 16 11:37:41 Computer systemd[1]: xinetd.service: Deactivated
successfully.
May 16 11:37:41 Computer systemd[1]: Stopped LSB: Starts or stops the
xinetd daemon..
May 16 11:37:41 Computer systemd[1]: Starting LSB: Starts or stops the
xinetd daemon....
May 16 11:37:41 Computer xinetd[1933]: * Starting internet superserver
xinetd
May 16 11:37:41 Computer xinetd[1933]: ...done.
May 16 11:37:41 Computer systemd[1]: Started LSB: Starts or stops the
xinetd daemon..
May 16 11:37:42 Computer xinetd[1945]: Reading included configuration
file: /etc/xinetd.d/chargen [file=/etc/xinetd.conf] [line=14]
May 16 11:37:42 Computer xinetd[1945]: Reading included configuration
file: /etc/xinetd.d/chargen-udp [file=/etc/xinetd.d/chargen-udp] [line=28]
May 16 11:37:42 Computer xinetd[1945]: Reading included configuration
file: /etc/xinetd.d/daytime [file=/etc/xinetd.d/daytime] [line=14]
May 16 11:37:42 Computer xinetd[1945]: Reading included configuration
file: /etc/xinetd.d/daytime-udp [file=/etc/xinetd.d/daytime-udp] [line=26]
May 16 11:37:42 Computer xinetd[1945]: Reading included configuration
file: /etc/xinetd.d/discard [file=/etc/xinetd.d/discard] [line=14]
May 16 11:37:42 Computer xinetd[1945]: Reading included configuration
file: /etc/xinetd.d/discard-udp [file=/etc/xinetd.d/discard-udp] [line=25]
May 16 11:37:42 Computer xinetd[1945]: Reading included configuration
file: /etc/xinetd.d/echo [file=/etc/xinetd.d/echo] [line=14]
May 16 11:37:42 Computer xinetd[1945]: Reading included configuration
file: /etc/xinetd.d/echo-udp [file=/etc/xinetd.d/echo-udp] [line=26]
May 16 11:37:42 Computer xinetd[1945]: Reading included configuration
file: /etc/xinetd.d/servers [file=/etc/xinetd.d/servers] [line=14]
May 16 11:37:42 Computer xinetd[1945]: Reading included configuration
file: /etc/xinetd.d/services [file=/etc/xinetd.d/services] [line=13]
May 16 11:37:42 Computer xinetd[1945]: Reading included configuration
file: /etc/xinetd.d/tftp [file=/etc/xinetd.d/tftp] [line=13]
May 16 11:37:42 Computer xinetd[1945]: Reading included configuration
file: /etc/xinetd.d/time [file=/etc/xinetd.d/time] [line=11]
May 16 11:37:42 Computer xinetd[1945]: Reading included configuration
file: /etc/xinetd.d/time-udp [file=/etc/xinetd.d/time-udp] [line=28]
May 16 11:37:42 Computer xinetd[1945]: added service tftp
[file=/etc/inetd.conf] [line=1]
May 16 11:37:42 Computer xinetd[1945]: 2.3.15.3 started with libwrap
loadavg labeled-networking options compiled in.
May 16 11:37:42 Computer xinetd[1945]: Started working: 2 available services
... but no listener is found on port 69 ...
user@Computer:/home$ netstat -na | grep LIST | grep 69
unix 2 [ ACC ] STREAM LISTENING 9169
/var/run/samba/nmbd/unexpected
... and generally there is no evidence of any tftp service actually
running, for example ...
user@Computer:/home$ ps -aux | grep -v grep | grep tftp
user@Computer:/home$ systemctl list-units --no-pager | grep tftp
user@Computer:/home$ sudo service --status-all | grep tftp
... all find nothing. Unsurprisingly therefore, when I try to set up a
test, nothing works ...
user@Computer:/home$ sudo echo "This is a TFTP test from $(hostname)" >
/home/tftpboot/test.txt
user@Computer:/home$ sudo chown nobody:nogroup /home/tftpboot/test.txt
user@Computer:/home$ ll /home/tftpboot/test.txt
-rw-r--r-- 1 nobody nogroup 36 2025-05-15 21:43 /home/tftpboot/test.txt
user@Computer:/home$ cat /home/tftpboot/test.txt
This is a TFTP test from Computer
user@Computer:/home$ tftp localhost
tftp> get test.txt
tftp: test.txt: Permission denied
tftp> q
Using 127.0.0.1 instead of localhost suffers the same fate, as does an
attempt to get a similar test text file from one of the Zyxel NSA221
NASs, as does an attempt for a non-existent file or a non-existent
server, so the error given could mean almost any type of failure and I
don't know whether I have one problem with the client on the Ubuntu PC,
or two problems with the service on each machine, PC and NAS, or all
three. I was going to install the windows TFTP client to test with
that, but for some reason or other that failed, and there's nothing in
the event logs to suggest why, so for the moment I'm stuck.
BTW, in case it's relevant, IPv6 is disabled on this PC:
user@Computer:/home$ ip a
1: lo:
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