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Operating System and Software
- Rocky Linux 8
Problem
-
On a default installation of TFTP server, using
getto retrieve files fails withError code 2: xxxx -
Attempt to retrieve a file using the relative path fails with
Error code 2: Only absolute filenames allowed.
# tftp localhost
tftp> get testfile
Error code 2: Only absolute filenames allowed
- Attempt to retrieve a file using the absolute path fails with
Error code 2: Forbidden directory.
tftp> get /var/lib/tftpboot/testfile
Error code 2: Forbidden directory
How to Fix
- The default installation of
tftp-serveron Rocky Linux 8 usessystemdinstead ofxinetdand does not require a config file to run. - Inspect any existing config files in
/etc/xinetd.d. - In this instance, a config file for
ftpdwas present in/etc/xinetd.d/ftpd. This interfered withtftpdand resulted in the errors displayed. - Removing the
ftpdconfig file then restartingxinetdresolved the issue.
Origin of the Problem
- An existing config file for
ftpdwas present in/etc/xinetd.d/ftpd.
Diagnostic Steps
- Install
tftp-serverandtftppackages on Rocky Linux 8.
# dnf install tftp-server tftp
- Start
tftpserver.
# systemctl start tftp
# systemctl status tftp
tftp.service - Tftp Server
Loaded: loaded (/usr/lib/systemd/system/tftp.service; indirect; vendor preset: disabled)
Active: active (running) since Thu 2020-07-09 10:46:07 BST; 5min ago
Docs: man:in.tftpd
Main PID: 27056 (in.tftpd)
Tasks: 1 (limit: 11482)
Memory: 376.0K
CGroup: /system.slice/tftp.service
└─27056 /usr/sbin/in.tftpd -s /var/lib/tftpboot
Jul 09 10:46:07 hostname.example.net systemd[1]: Started Tftp Server.
- Create test file in the default directory
/var/lib/tftpboot
# touch /var/lib/tftpboot/testfile
- Check UDP port for
tftpdis listening. This issue will only reproduce if the first entry displays the name of the servicein.tftpdandxinetd
# ss -pluton | grep ":69"
udp UNCONN 0 0 0.0.0.0:69 0.0.0.0:* users:(("in.tftpd",pid=10350,fd=0),("xinetd",pid=998,fd=6))
udp UNCONN 0 0 *:69 *:* users:(("systemd",pid=1,fd=220))
- Attempt to retrieve a file using the relative path fails with
Error code 2: Only absolute filenames allowed.
# tftp localhost
tftp> get testfile
Error code 2: Only absolute filenames allowed
- Attempt to retrieve a file using the absolute path fails with
Error code 2: Forbidden directory.
tftp> get /var/lib/tftpboot/testfile
Error code 2: Forbidden directory
