FTPUSERS(5) Standards, Environments, and Macros FTPUSERS(5)
ftpusers - file listing users to be disallowed ftp login privileges
file lists users for whom ftp
login privileges are
disallowed. Each ftpuser
entry is a single line of the form:
is the user's login name.
The FTP Server, in.ftpd(8)
, reads the ftpusers
file. If the login name of
the user matches one of the entries listed, it rejects the login attempt.
file has the following default configuration entries:
These entries match the default instantiated entries from passwd(5)
list of default entries typically contains the superuser root
administrative and system application identities.
The root entry is included in the ftpusers
file as a security measure
since the default policy is to disallow remote logins for this identity.
This policy is also set in the default value of the CONSOLE
entry in the /etc/default/login
file. See login(1)
. If you allow root
by deleting the root entry in ftpusers
, you should also modify the
security policy in /etc/default/login
to reflect the site security policy
for remote login access by root
Other default entries are administrative identities that are typically
assumed by system applications but never used for local or remote login,
for example sys
. Since these entries do not have a valid
password field instantiated in shadow(5)
, no login can be performed.
If a site adds similar administrative or system application identities in passwd(5)
, for example, majordomo
, the site should consider
including them in the ftpusers
file for a consistent security policy.
Lines that begin with #
are treated as comment lines and are ignored.
A file that lists users for whom ftp
privileges are disallowed. /etc/ftpusers
. This file is deprecated,
although its use is still supported. /etc/default/login /etc/passwd
password file /etc/shadow
shadow password file
for descriptions of the following attributes:
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|Interface Stability | See below. |
The interface stability for /etc/ftpd/ftpusers
is Volatile. The interface
stability for /etc/ftpusers
SEE ALSO login(1)
May 1, 2003 FTPUSERS(5)