Chrooted sftp on rhel3

[John J. Culkin]

How would I go about creating a chrooted SFTP on RHEL 4 or  5?

Is the process much different?

Johan Booysen wrote:
> Hi,
>
> Thanks very much for all your replies.
>
> I've managed to get it to work in the following way:
>
> I copied the directories you create in your chroot jail (in my example
> the directories etc, lib, and usr in my chroot jail /home) to the
> individual ftp user's home folder:
>
> # pwd
> /home
> # ls -l
> total 24
> drwxr-xr-x    2 root     root         4096 Jun 15 10:41 etc
> drwx------    3 ftpuser  ftpuser      4096 Jun 15 11:20 ftpuser
> drwxr-xr-x    3 root     root         4096 Jun 14 17:28 lib
> drwxr-xr-x    6 root     root         4096 Jun 14 17:26 usr
>
> # cp -r etc ftpuser/
> # cp -r lib ftpuser/
> # cp -r usr ftpuser/
>
> And then I modify /etc/rssh.conf and add an entry for that user:
>
> user=ftpuser:011:00010:"/home/ftpuser"  # sftp with chroot
>
> And that works, it seems.
>
> :)
>
> I'm writing up a complete guide here:
>
> http://joedonner2001.wordpress.com/red-hat-el3/sftp-server-within-a-chro
> ot-jail
>
> but just note that it's not 100% accurate at the moment.
>
> Johan
>
> -----Original Message-----
> From: redhat-list-bounces at redhat.com
> [mailto:redhat-list-bounces at redhat.com] On Behalf Of Karl Latiss
> Sent: 16 June 2007 10:05
> To: General Red Hat Linux discussion list
> Subject: Re: Chrooted sftp on rhel3
>
> On Fri, 2007-06-15 at 11:42 +0100, Johan Booysen wrote:
>   
>> Hi everyone,
>>
>> I'm doing some tests setting up an sftp server, with setting up a 
>> chroot jail for ftp users.
>>
>> Everything seems to be working fine, but "ftpuser" can cd to outside 
>> his home directory (ftpuser cannot access the user1 or user2 
>> directories, but can get to etc, lib, and user), which ideally I don't
>>     
>
>   
>> want.  I've played around with setting different permissions, but only
>>     
>
>   
>> the permissions below seem to work.
>>
>> In /etc/rssh.conf, I've got the following to set the chroot path:
>> chrootpath = /home
>>
>> # pwd
>> /home
>> # ls -l
>> total 24
>> drwxr-xr-x    2 root     root         4096 Jun 15 10:41 etc
>> drwx------    3 ftpuser  ftpuser      4096 Jun 15 11:20 ftpuser
>> drwx------    4 user1    user1        4096 May 25 15:27 gmi
>> drwx------    5 user2    user2        4096 Jun 14 16:54 jhb
>> drwxr-xr-x    3 root     root         4096 Jun 14 17:28 lib
>> drwxr-xr-x    6 root     root         4096 Jun 14 17:26 usr
>>
>> I've then also removed all entries from the copy of the passwd file in
>>     
>
>   
>> /home/etc/passwd, so that only the ftp users' accounts appear in it.
>>
>> Any ideas on how to restrict access so ftp users are locked into their
>>     
>
>   
>> own home directories - if that is even possible?  It doesn't seem like
>>     
>
>   
>> much of an issue to me, but I'd appreciate your thoughts.
>>
>>     
> What is ftpuser's shell and home directory? Also have you set allowsftp
> in /etc/rssh.conf ?
>
> There also may be some clues in /var/log/messages depending on what you
> have set logfacility to.
>
>   

-- 
John J. Culkin			Systems Administrator
John.Culkin at Scranton.edu	The University of Scranton
Phone: (570) 941-7665