sftp and ftp servers access only
peepstein at canada.com
Wed Dec 10 05:11:22 PST 2003
Lines prefixed with ">" are what login at istop.com wrote.
>Here is our environment:
>1. FreeBSD 5.1-RELEASE
>1. proftpd running and a user account called 'sandy' is chrooted and working
> fine. 2. sshd version OpenSSH_3.6.1p1 FreeBSD-20030423 with DenyUsers for
> user account 'sandy'. Tested, sandy can not ssh to the system. This is also
># grep DenyUsers /etc/ssh/sshd_config
>The setup we want is to have the followings:
>A. User can ftp.
>B. User can sftp but on ssh.
>C. User can only sftpd to the same chroot'ed directory which is also used
> for ftp.
>Here A is fine. B is not as DenyUsers does not let 'sandy' to user
>sftp-server defined in /etc/ssh/sshd_config as follows:
>Subsystem sftp /usr/libexec/sftp-server
>If I remove the user 'sandy' against the DenyUsers, it does let him to
>use both ssh and sftp sessions. This is working as designed.
>To make things more complicated, I cp the /sbin/nologin to
>/sbin/ftponly and placed in /etc/shells and removed against DenyUsers
>for 'sandy'. He initialize a ssh session and ends up in getting
>"This account is currently not available." which is good and also verified
> in the /var/log/auth.log file as:
>Dec 10 04:41:11 ftp sshd: Accepted password for sandy from x.x.x.x port
> 1287 ssh2 Dec 10 04:41:11 ftp sshd: session_input_channel_req: no
> session 0 req window-change
>and when starting a sftp session, no success either and /var/log/auth.log
>Dec 10 04:44:07 ftp sshd: Accepted password for sandy from x.x.x.x port
> 1296 ssh2 Dec 10 04:44:07 ftp sshd: subsystem request for sftp
>Moral of the story: Is it possible with the above environment that a system
> can act as an ftp and sftp servers only at the same time. If possibly it
> does, how some one chroot the environment like in proftpd for the
> DefaultRoot set to same in sftp session.
Check out /usr/ports/shells/scponly. Make sure to compile it with chroot
support, if that's what you want.
>Thank you for reading my first letter to this list!
> \|/ S. Mohammad [login at istop.com]
> '--- Who taught by the pen [96.04 Qur'an]
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