postgresql/src/backend/libpq/pg_hba.conf.sample

#
# Example PostgreSQL host access control file.
#
# 
# This file controls what hosts are allowed to connect to what databases
# and specifies some options on how users on a particular host are identified.
# It is read each time a host tries to make a connection to a database.
# 
# Each line (terminated by a newline character) is a record.  A record cannot
# be continued across two lines.
# 
# There are 3 kinds of records:
# 
#   1) comment:  Starts with #.
# 
#   2) empty:  Contains nothing excepting spaces and tabs.
# 
#   3) content: anything else.  
# 
# Unless specified otherwise, "record" from here on means a content
# record.
# 
# A record consists of tokens separated by spaces or tabs.  Spaces and
# tabs at the beginning and end of a record are ignored as are extra
# spaces and tabs between two tokens.
# 
# The first token in a record is the record type.  The interpretation of the
# rest of the record depends on the record type.
# 
# Record type "host"
# ------------------
# 
# This record identifies a set of network hosts that are permitted to connect
# to databases.  No network hosts are permitted to connect except as specified
# by a "host" record.  See the record type "local" to specify permitted
# connections using UNIX sockets.
#
# Format:
# 
#   host DBNAME IP_ADDRESS ADDRESS_MASK AUTHTYPE [AUTH_ARGUMENT]
# 
# DBNAME is the name of a PostgreSQL database, "all" to indicate all 
# databases, or "sameuser" to restrict a user's access to a database
# with the same user name.
# 
# IP_ADDRESS and ADDRESS_MASK are a standard dotted decimal IP address and
# mask to identify a set of hosts.  These hosts are allowed to connect to 
# Database DBNAME. 
# 
# AUTHTYPE is a keyword indicating the method used to authenticate the 
# user, i.e. to determine that the principal is authorized to connect
# under the PostgreSQL username he supplies in his connection parameters.
#
#   ident:  Authentication is done by the ident server on the remote
#           host, via the ident (RFC 1413) protocol.  AUTH_ARGUMENT, if
#           specified, is a map name to be found in the pg_ident.conf file.
#           That table maps from ident usernames to PostgreSQL usernames.  The
#           special map name "sameuser" indicates an implied map (not found
#           in pg_ident.conf) that maps every ident username to the identical
#           PostgreSQL username.
#
#   trust:  No authentication is done.  Trust that the user has the 
#           authority to use whatever username he specifies.  Before 
#           PostgreSQL version 6, all authentication was done this way.
#
#   reject: Reject the connection.
#
#   password:  Authentication is done by matching a password supplied in clear
#	       by the host.  If AUTH_ARGUMENT is specified then the password
#              is compared with the user's entry in that file (in the $PGDATA
#	       directory).  See pg_passwd(1).  If it is omitted then the
#	       password is compared with the user's entry in the pg_shadow
#	       table.
#
#   crypt:  Authentication is done by matching an encrypted password supplied
#	    by the host with that held for the user in the pg_shadow table.
#
#   krb4:   Kerberos V4 authentication is used.
#
#   krb5:   Kerberos V5 authentication is used.

# Record type "hostssl"
# ---------------------
#
# This record identifies the authentication to use when connecting to a
# particular database via TCP/IP sockets over SSL. Note that normal
# "host" records are also matched - "hostssl" records can be used to
# require a SSL connection.
# This keyword is only available if the server is compiled with SSL support
# enabled.
#
# The format of this record is identical to that of "host".

# Record type "local"
# ------------------
# 
# This record identifies the authentication to use when connecting to a
# particular database via a local UNIX socket.
#
# Format:
# 
#   local DBNAME AUTHTYPE [AUTH_ARGUMENT]
#
# The format is the same as that of the "host" record type except that the
# IP_ADDRESS and ADDRESS_MASK are omitted and the "ident", "krb4" and "krb5"
# values of AUTHTYPE are not allowed.

# For backwards compatibility, PostgreSQL also accepts pre-version 6 records,
# which look like:
# 
#   all         127.0.0.1    0.0.0.0

# TYPE       DATABASE    IP_ADDRESS    MASK                AUTHTYPE  MAP
 
#host         all         127.0.0.1    255.255.255.255     trust     
 
# The above allows any user on the local system to connect to any database
# under any username.
 
#host         template1   192.168.93.0 255.255.255.0       ident     sameuser
 
# The above allows any user from any host with IP address 192.168.93.x to
# connect to database template1 as the same username that ident on that host
# identifies him as (typically his Unix username).  

#host         all        192.168.54.1  255.255.255.255     reject
#host         all        0.0.0.0       0.0.0.0             trust

# The above would allow anyone anywhere except from 192.168.54.1 to connect to
# any database under any username.

#host         all        192.168.77.0  255.255.255.0       ident     omicron
#
# The above would allow users from 192.168.77.x hosts to connect to any
# database, but if Ident says the user is "bryanh" and he requests to
# connect as PostgreSQL user "guest1", the connection is only allowed if
# there is an entry for map "omicron" in pg_ident.conf that says "bryanh" is 
# allowed to connect as "guest1".

# By default, allow anything over UNIX domain sockets and localhost.

local        all                                           trust
host         all         127.0.0.1     255.255.255.255     trust