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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