S/FTP/S security and root group?

Question

linux

Greetings,
The task was to make an s / ftp / s server so that the user has access to one place with the same rights for all three protocols.
Given: ubuntu14, sshd+proftpd
user -G ftpaccess -shell /bin/false
part of sshd:

PermitRootLogin no
Match group ftpaccess
ChrootDirectory %h

proftpd:

DefaultRoot                     ~
User                            proftpd
Group                           nogroup
Include /etc/proftpd/tls.conf
# Include mod_exec.c

home rights:

[email protected]:/home/testuser# ls -l /home/
drwxr-x--- 5 root   ftpaccess 4096 Nov 11 14:48 testuser

[email protected]:/home/testuser# ls -l /home/testuser/
drwxr-xr-x 2 testuser ftpaccess 4096 Oct 23 13:02 IN
drwxr-xr-x 2 testuser ftpaccess 4096 Oct 20 15:47 OUT
drwxr-xr-x 2 testuser ftpaccess 4096 Oct 20 15:38 TMP

A user with a primary group ftpaccess cannot log in via ftp/s 530 Login incorrect.
By adding an additional root to the group, everything works as it should.
How critical is this for security?

Answer 1

Updated php5.4.4 to 5.4.25 and everything worked.

Answer 2

www.linux.org.ru/forum/admin/8054334 this problem was discussed here, read it, maybe something will help

Answer 3

What is the core?
Have you played with timeouts?

Answer 4

apt-get install --reinstall php5-fpm