ftpusers(4)

NAME | SYNOPSIS | DESCRIPTION | FILES | ATTRIBUTES | SEE ALSO

NAME

ftpusers- file listing users to be disallowed ftp login privileges

SYNOPSIS

/etc/ftpusers

DESCRIPTION

The /etc/ftpusers is an ASCII file that lists users for whom ftp login privileges are disallowed. 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 session and sends the Login incorrect and Login failed error messages.

The ftpusers file has the following default configuration entries:

---

root
daemon
bin
sys
adm
lp
uccp
nuucp
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 /etc/ftpusers as a security measure since the default policy is to disallow remote logins for this identity. This policy is also set in the 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 /etc/ftpusers, you should also should 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 and nobody. Since these entries do not have a valid password field instantiated in shadow(4), no login can be performed.

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 /etc/ftpusers for a consistent security policy.

FILES

/etc/ftpusers

/etc/default/login

/etc/passwd

/etc/shadow

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Availability	SUNWftpr

SEE ALSO

login(1), in.ftpd(1M), passwd(4), shadow(4), attributes(5), environ(5)

SunOS 5.8  Last Revised 8 Dec 1999

NAME | SYNOPSIS | DESCRIPTION | FILES | ATTRIBUTES | SEE ALSO