Maybe it's time to get rid of tcpwrappers/tcpd?

[Florian Weimer]

On 03/24/2014 01:06 PM, Reindl Harald wrote:

> Am 24.03.2014 12:57, schrieb Nicolas Mailhot:
>> Le Sam 22 mars 2014 01:20, Miloslav Trmač a écrit :
>>
>>> The RHEL documentation, apart from fully describing the abilities,
>>> specifically describes two uses: a ftpd banner
>>
>> Surprisingly, ftp is still widely used entreprise-side, because ssh is
>> giving too much access
>
> no, it is easy to restrict ssh to ONLY sftp and chroot and with
> simple bind-mounts you can completly replace ftp, doing that here
> in production over years with 3 simple scripts

It's still very difficult to securely process uploaded files under a 
different user account.  Some SFTP clients set restrictive permissions 
on upload, and the OpenSSH implementation does not allow to bypass that.

-- 
Florian Weimer / Red Hat Product Security Team