| Server IP : 103.119.228.120 / Your IP : 3.143.237.140 Web Server : Apache System : Linux v8.techscape8.com 3.10.0-1160.119.1.el7.tuxcare.els2.x86_64 #1 SMP Mon Jul 15 12:09:18 UTC 2024 x86_64 User : nobody ( 99) PHP Version : 5.6.40 Disable Function : shell_exec,symlink,system,exec,proc_get_status,proc_nice,proc_terminate,define_syslog_variables,syslog,openlog,closelog,escapeshellcmd,passthru,ocinum cols,ini_alter,leak,listen,chgrp,apache_note,apache_setenv,debugger_on,debugger_off,ftp_exec,dl,dll,myshellexec,proc_open,socket_bind,proc_close,escapeshellarg,parse_ini_filepopen,fpassthru,exec,passthru,escapeshellarg,escapeshellcmd,proc_close,proc_open,ini_alter,popen,show_source,proc_nice,proc_terminate,proc_get_status,proc_close,pfsockopen,leak,apache_child_terminate,posix_kill,posix_mkfifo,posix_setpgid,posix_setsid,posix_setuid,dl,symlink,shell_exec,system,dl,passthru,escapeshellarg,escapeshellcmd,myshellexec,c99_buff_prepare,c99_sess_put,fpassthru,getdisfunc,fx29exec,fx29exec2,is_windows,disp_freespace,fx29sh_getupdate,fx29_buff_prepare,fx29_sess_put,fx29shexit,fx29fsearch,fx29ftpbrutecheck,fx29sh_tools,fx29sh_about,milw0rm,imagez,sh_name,myshellexec,checkproxyhost,dosyayicek,c99_buff_prepare,c99_sess_put,c99getsource,c99sh_getupdate,c99fsearch,c99shexit,view_perms,posix_getpwuid,posix_getgrgid,posix_kill,parse_perms,parsesort,view_perms_color,set_encoder_input,ls_setcheckboxall,ls_reverse_all,rsg_read,rsg_glob,selfURL,dispsecinfo,unix2DosTime,addFile,system,get_users,view_size,DirFiles,DirFilesWide,DirPrintHTMLHeaders,GetFilesTotal,GetTitles,GetTimeTotal,GetMatchesCount,GetFileMatchesCount,GetResultFiles,fs_copy_dir,fs_copy_obj,fs_move_dir,fs_move_obj,fs_rmdir,SearchText,getmicrotime MySQL : ON | cURL : ON | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : ON Directory : /usr/local/ssl/local/ssl/local/ssl/share/doc/postgresql-9.2.24/html/ |
Upload File : |
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>dblink_connect_u</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REV="MADE"
HREF="mailto:pgsql-docs@postgresql.org"><LINK
REL="HOME"
TITLE="PostgreSQL 9.2.24 Documentation"
HREF="index.html"><LINK
REL="UP"
TITLE="dblink"
HREF="dblink.html"><LINK
REL="PREVIOUS"
TITLE="dblink_connect"
HREF="contrib-dblink-connect.html"><LINK
REL="NEXT"
TITLE="dblink_disconnect"
HREF="contrib-dblink-disconnect.html"><LINK
REL="STYLESHEET"
TYPE="text/css"
HREF="stylesheet.css"><META
HTTP-EQUIV="Content-Type"
CONTENT="text/html; charset=ISO-8859-1"><META
NAME="creation"
CONTENT="2017-11-06T22:43:11"></HEAD
><BODY
CLASS="REFENTRY"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="5"
ALIGN="center"
VALIGN="bottom"
><A
HREF="index.html"
>PostgreSQL 9.2.24 Documentation</A
></TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="top"
><A
TITLE="dblink_connect"
HREF="contrib-dblink-connect.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="top"
><A
HREF="dblink.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="60%"
ALIGN="center"
VALIGN="bottom"
></TD
><TD
WIDTH="20%"
ALIGN="right"
VALIGN="top"
><A
TITLE="dblink_disconnect"
HREF="contrib-dblink-disconnect.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><H1
><A
NAME="CONTRIB-DBLINK-CONNECT-U"
></A
>dblink_connect_u</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN147194"
></A
><H2
>Name</H2
>dblink_connect_u -- opens a persistent connection to a remote database, insecurely</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN147197"
></A
><H2
>Synopsis</H2
><PRE
CLASS="SYNOPSIS"
>dblink_connect_u(text connstr) returns text
dblink_connect_u(text connname, text connstr) returns text</PRE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN147199"
></A
><H2
>Description</H2
><P
> <CODE
CLASS="FUNCTION"
>dblink_connect_u()</CODE
> is identical to
<CODE
CLASS="FUNCTION"
>dblink_connect()</CODE
>, except that it will allow non-superusers
to connect using any authentication method.
</P
><P
> If the remote server selects an authentication method that does not
involve a password, then impersonation and subsequent escalation of
privileges can occur, because the session will appear to have
originated from the user as which the local <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>
server runs. Also, even if the remote server does demand a password,
it is possible for the password to be supplied from the server
environment, such as a <TT
CLASS="FILENAME"
>~/.pgpass</TT
> file belonging to the
server's user. This opens not only a risk of impersonation, but the
possibility of exposing a password to an untrustworthy remote server.
Therefore, <CODE
CLASS="FUNCTION"
>dblink_connect_u()</CODE
> is initially
installed with all privileges revoked from <TT
CLASS="LITERAL"
>PUBLIC</TT
>,
making it un-callable except by superusers. In some situations
it may be appropriate to grant <TT
CLASS="LITERAL"
>EXECUTE</TT
> permission for
<CODE
CLASS="FUNCTION"
>dblink_connect_u()</CODE
> to specific users who are considered
trustworthy, but this should be done with care. It is also recommended
that any <TT
CLASS="FILENAME"
>~/.pgpass</TT
> file belonging to the server's user
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>not</I
></SPAN
> contain any records specifying a wildcard host name.
</P
><P
> For further details see <CODE
CLASS="FUNCTION"
>dblink_connect()</CODE
>.
</P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="contrib-dblink-connect.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="index.html"
ACCESSKEY="H"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="contrib-dblink-disconnect.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>dblink_connect</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="dblink.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>dblink_disconnect</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>