Eric B. wrote:
Hi,
I've been struggling with this problem for the last couple of hours and am nowhere near solving the problem. I am trying to run a tftp server in a chroot jail. Now perhaps I am being paranoid, but I would like to have it launched from within its own jail even if it supposedly does a chroot itself and runs with a parameterizable user.
there is only one chroot under unix (you can't chroot from the shell then in the daemon).
If a service implements chroot correctly, then it is better to use it (because it can load the necessary stuff before, so you don't need to copy a whole system to the jail).
I downloaded the atftp-server package and tried to set up my own tftpd jail. I copied over the linked libs to the proper place, the /etc/passwd, /etc/groups, /etc/hosts, /etc/nsswitch.conf, /etc/resolv, /etc/services files. I even created the dev/null device and set up syslog to read from the jail/dev/log device.
However, I can't seem to launch it from within the jail. It works fine when I try from the regular prompt, but when I try to launch from within the jail, I doesn't want to start:
[root@apollo tftpd]# /usr/sbin/chroot /chroot/tftpd/ /usr/sbin/atftpd --daemon --no-fork
in /var/log/messages: Jan 12 23:09:02 apollo atftpd[17479]: atftpd: udp/tftp, unknown service
So it apparently is unable to read my /chroot/tftpd/etc/services file. If I set the port number manually: [root@apollo tftpd]# /usr/sbin/chroot /chroot/tftpd/ /usr/sbin/atftpd --daemon --no-fork --port 69 -user eric.eric
Jan 12 23:16:05 apollo atftpd[17556]: atftpd: can't change identity to eric.eric, exiting.
I know the tftpd daemon is able to read the /chroot/tftpd/etc/ directory as it is properly reading my /etc/localtime file (if i remove /etc/localtime the logged timestamp changes).
Can anyone point me in the right direction as to things to try? I've tried everything I can think of, and even then some things, but just can't figure it out...
Thanks!
Eric
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