ftpusers(4) File Formats ftpusers(4)NAMEftpusers - file listing users to be disallowed ftp login privileges
SYNOPSIS
/etc/ftpd/ftpusers
DESCRIPTION
The ftpusers file lists users for whom ftp login privileges are disal‐
lowed. Each ftpuser entry is a single line of the form:
name
where name is the user's login name.
The FTP Server, in.ftpd(1M), reads the ftpusers file. If the login name
of the user matches one of the entries listed, it rejects the login
attempt.
The ftpusers file has the following default configuration entries:
root
daemon
bin
sys
adm
lp
uccp
nuucp
smmsp
listen
nobody
noaccess
nobody4
These entries match the default instantiated entries from passwd(4).
The list of default entries typically contains the superuser root and
other 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 iden‐
tity. 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 login
privileges by deleting the root entry in ftpusers, you should also mod‐
ify the security policy in /etc/default/login to reflect the site secu‐
rity 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 and nobody. Since these entries do not have a
valid password field instantiated in shadow(4), no login can be per‐
formed.
If a site adds similar administrative or system application identities
in passwd(4) and shadow(4), 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.
FILES
/etc/ftpd/ftpusers A file that lists users for whom ftp login
privileges are disallowed.
/etc/ftpusers See /etc/ftpd/ftpusers. This file is depre‐
cated, although its use is still supported.
/etc/default/login
/etc/passwd password file
/etc/shadow shadow password file
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Availability │SUNWftpr │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │External │
│ │ │
│ /etc/ftpd/ftpusers │ │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Obsolete │
│ │ │
│ /etc/ftpusers │ │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOlogin(1), in.ftpd(1M), ftpaccess(4), ftphosts(4), passwd(4), shadow(4),
attributes(5), environ(5)SunOS 5.10 1 May 2003 ftpusers(4)
