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rhosts(5) [freebsd man page]

HOSTS.EQUIV(5)						      BSD File Formats Manual						    HOSTS.EQUIV(5)

hosts.equiv, .rhosts -- trusted remote host and user name data base DESCRIPTION
The hosts.equiv and .rhosts files contain information regarding trusted hosts and users on the network. For each host a single line should be present with the following information: simple hostname [username] or the more verbose [+-][hostname|@netgroup] [[+-][username|@netgroup]] A ``@'' indicates a host by netgroup or user by netgroup. A single ``+'' matches all hosts or users. A host name with a leading ``-'' will reject all matching hosts and all their users. A user name with leading ``-'' will reject all matching users from matching hosts. Items are separated by any number of blanks and/or tab characters. A ``#'' indicates the beginning of a comment; characters up to the end of the line are not interpreted by routines which search the file. Host names are specified in the conventional Internet DNS dotted-domains ``.'' (dot) notation using the inet_addr(3) routine from the Inter- net address manipulation library, inet(3). Host names may contain any printable character other than a field delimiter, newline, or comment character. For security reasons, a user's .rhosts file will be ignored if it is not a regular file, or if it is not owned by the user, or if it is writable by anyone other than the user. FILES
/etc/hosts.equiv The hosts.equiv file resides in /etc. $HOME/.rhosts .rhosts file resides in $HOME. EXAMPLES foo Trust user ``foo'' from host ``''. +@allclient Trust all hosts from netgroup ``allclient''. +@allclient -@dau Trust all hosts from netgroup ``allclient'' and their users except users from netgroup ``dau''. SEE ALSO
rcp(1), rlogin(1), rsh(1), gethostbyname(3), inet(3), innetgr(3), ruserok(3), netgroup(5), ifconfig(8), yp(8) BUGS
This manual page is incomplete. For more information read the source in src/lib/libc/net/rcmd.c or the SunOS manual page. BSD
December 25, 2013 BSD

Check Out this Related Man Page

hosts.equiv(4)						     Kernel Interfaces Manual						    hosts.equiv(4)

hosts.equiv - A file containing the names of remote systems and users that can execute commands on the local system SYNOPSIS
/etc/hosts.equiv DESCRIPTION
The /etc/hosts.equiv file and the .rhosts file in a user's home directory contain the names of remote hosts and users that are equivalent to the local host or user. An equivalent host or user is allowed to access a local nonsuperuser account with the rsh command or rcp com- mand, or to log in to such an account without having to supply a password. The /etc/hosts.equiv file specifies equivalence for an entire system, while a user's .rhosts file specifies equivalence between that user and remote users. The local user and the target system exist in the same area as the hosts.equiv file. The .rhosts file must be owned by the user in whose home directory the file is located, or by the superuser. It cannot be a symbolic link. Each line, or entry, in hosts.equiv or .rhosts may consist of the following: A blank line. A comment (begins with a #). A host name (a string of any printable characters except newline, #, or white space). In addition, an NIS netgroup can be specified in place of the host name. A host name followed by white space and a user name. In addition, an NIS netgroup can be specified in place of the host name, user name, or both. A single plus (+) character. This means any host and user. The keyword NO_PLUS. This keyword disallows the use of the plus character (+) to match any host or user on a system-wide basis. By default, the line containing this keyword is a comment. Remove the com- ment character to disallow the use of the plus character. Entries in the hosts.equiv file are either positive or negative. Positive entries allow access; negative entries deny access. The following entries are positive: host name user name +@netgroup In addition, the plus sign (+) can be used in place of the host name or user name. In place of the host name, it means any remote host. In place of the user name, it means any user. The following entries are negative: -host name -user name -@netgroup To be allowed access or denied access, a user's remote host name and user name must match an entry in hosts.equiv or .rhosts. The hosts.equiv file is searched first; if a match is found, the search ends. Therefore, the order in which the positive and negative entries appear is important. If a match is not found, .rhosts is searched if it exists in the user's home directory. A host name or user name can match an entry in hosts.equiv in one of the following ways: The official host name (not an alias) of the remote host matches a host name in hosts.equiv. The remote user name matches a user name in hosts.equiv. If a user name parameter is included in the hosts.equiv file, this means that the remote user is a trusted user and is allowed to rlogin to any local user account without being prompted for a password. Otherwise, if the user name parameter is not specified in the hosts.equiv file, the name of the remote user must match that of the local user. If the remote user name does not match a user name in hosts.equiv, the remote user name matches the local user name. CAUTIONS
For security purposes, the files /etc/hosts.equiv and .rhosts should exist and be readable and writable only by the owner, even if they are empty. EXAMPLES
The following are sample entries in an /etc/hosts.equiv file: # Allows access to users on host1 and host2 that have accounts on this host: host1 host2 # Allows access to user johnson on host1 to any local user: host1 johnson # Allows access to all users on systems specified in netgroup chicago +@chicago # Denies access to users specified in netgroup finance on host5 host5 -@finance # Allows access to all users on all systems except root + -root RELATED INFORMATION
Commands: rcp(1), rlogin(1), rsh(1) Functions: ruserok(3). Files: netgroup(4) Daemons: rlogind(8), rshd(8) delim off hosts.equiv(4)
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