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Name	Size	Permission
about.htm	5.13 KB	-rw-r--r--
aboutunicode.htm	6.69 KB	-rw-r--r--
acknowledgments.htm	4.39 KB	-rw-r--r--
advocacy.htm	3.67 KB	-rw-r--r--
ambition.htm	3.52 KB	-rw-r--r--
apireference.htm	4.71 KB	-rw-r--r--
appendmode.htm	4.1 KB	-rw-r--r--
askingforhelp.htm	5.36 KB	-rw-r--r--
build.htm	4.73 KB	-rw-r--r--
choosingtdsprotocol.htm	6.62 KB	-rw-r--r--
config.htm	17.16 KB	-rw-r--r--
configs.htm	4.9 KB	-rw-r--r--
confirminstall.htm	16.33 KB	-rw-r--r--
contrib.htm	5.98 KB	-rw-r--r--
contributors.htm	2.47 KB	-rw-r--r--
ctlib.api.summary.htm	14.88 KB	-rw-r--r--
dblib.api.summary.htm	28.32 KB	-rw-r--r--
domains.htm	6.22 KB	-rw-r--r--
dsnless.htm	5.96 KB	-rw-r--r--
envvar.htm	6.93 KB	-rw-r--r--
freetdsconf.htm	18.39 KB	-rw-r--r--
freetdshistory.htm	4.45 KB	-rw-r--r--
gfdl-10.htm	3.11 KB	-rw-r--r--
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gfdl-1.htm	5.42 KB	-rw-r--r--
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gfdl-9.htm	2.6 KB	-rw-r--r--
gfdl.htm	4.46 KB	-rw-r--r--
help.htm	5.31 KB	-rw-r--r--
index.htm	23.65 KB	-rw-r--r--
index.html	23.65 KB	-rw-r--r--
install.htm	5.59 KB	-rw-r--r--
interfacesfile.htm	3.64 KB	-rw-r--r--
interfacesformat.htm	4.71 KB	-rw-r--r--
interfaceslocation.htm	2.45 KB	-rw-r--r--
interfacespurpose.htm	4.83 KB	-rw-r--r--
iso8859.htm	5.31 KB	-rw-r--r--
isolatecause.htm	4.39 KB	-rw-r--r--
kerberos.htm	3.92 KB	-rw-r--r--
light.taper.htm	3.03 KB	-rw-r--r--
linker.conclusion.htm	2.75 KB	-rw-r--r--
linker.how.htm	13.61 KB	-rw-r--r--
linker.library.check.htm	5.31 KB	-rw-r--r--
locales.htm	6.89 KB	-rw-r--r--
localization.htm	11.32 KB	-rw-r--r--
logging.htm	7.35 KB	-rw-r--r--
mailinglist.htm	4.1 KB	-rw-r--r--
name.lookup.htm	4.14 KB	-rw-r--r--
odbc.api.summary.htm	16.65 KB	-rw-r--r--
odbcconnattr.htm	7.31 KB	-rw-r--r--
odbcdiagnose.htm	8.88 KB	-rw-r--r--
odbcinionly.htm	3.47 KB	-rw-r--r--
odbcombo.htm	4.44 KB	-rw-r--r--
osissues.htm	10.13 KB	-rw-r--r--
packages.htm	4.43 KB	-rw-r--r--
pagenodata.htm	5.88 KB	-rw-r--r--
perl.htm	7.36 KB	-rw-r--r--
php.htm	7.73 KB	-rw-r--r--
portoverride.htm	3.86 KB	-rw-r--r--
prepodbc.htm	9.89 KB	-rw-r--r--
programming.htm	2.76 KB	-rw-r--r--
projects.htm	11.26 KB	-rw-r--r--
python.htm	4.01 KB	-rw-r--r--
qt.htm	2.69 KB	-rw-r--r--
rtl.define.library.htm	8.43 KB	-rw-r--r--
rtl.htm	7.22 KB	-rw-r--r--
samplecode.htm	48.19 KB	-rw-r--r--
seemtooslow.htm	4.72 KB	-rw-r--r--
serverthere.htm	6.59 KB	-rw-r--r--
software.htm	5.79 KB	-rw-r--r--
stunnel.htm	4.11 KB	-rw-r--r--
sybsql.htm	4.56 KB	-rw-r--r--
tdshistory.htm	5.16 KB	-rw-r--r--
tdspool.htm	7.72 KB	-rw-r--r--
troubleshooting.htm	10.84 KB	-rw-r--r--
unicodefreetds.htm	4.96 KB	-rw-r--r--
unicodegoodbad.htm	4.99 KB	-rw-r--r--
unicode.htm	4.07 KB	-rw-r--r--
unicodeutf.htm	5.32 KB	-rw-r--r--
uodbc.htm	5.7 KB	-rw-r--r--
uothread.htm	3.19 KB	-rw-r--r--
usefreetds.htm	6.26 KB	-rw-r--r--
userguide.css	295 B	-rw-r--r--
what.htm	7.85 KB	-rw-r--r--

Code Editor : interfacespurpose.htm

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<HTML
><HEAD
><TITLE
>What it does</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REL="HOME"
TITLE="FreeTDS User Guide"
HREF="index.htm"><LINK
REL="UP"
TITLE="The interfaces File"
HREF="interfacesfile.htm"><LINK
REL="PREVIOUS"
TITLE="Where it goes"
HREF="interfaceslocation.htm"><LINK
REL="NEXT"
TITLE="What it looks like"
HREF="interfacesformat.htm"><LINK
REL="STYLESHEET"
TYPE="text/css"
HREF="userguide.css"><META
HTTP-EQUIV="Content-Type"
CONTENT="text/html; charset=utf-8"></HEAD
><BODY
CLASS="SECT1"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
><SPAN
CLASS="PRODUCTNAME"
>FreeTDS</SPAN
> User Guide: A Guide to Installing, Configuring, and Running <SPAN
CLASS="PRODUCTNAME"
>FreeTDS</SPAN
></TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="interfaceslocation.htm"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
>Appendix B. The <TT
CLASS="FILENAME"
>interfaces</TT
> File</TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="interfacesformat.htm"
ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="INTERFACESPURPOSE"
>What it does</A
></H1
><P
>The <TT
CLASS="FILENAME"
>interfaces</TT
> file aliases a servername to the hostname and port number of the servername's machine.  When <SPAN
CLASS="PRODUCTNAME"
>FreeTDS</SPAN
> receives a request to connect to a database server, it looks up the servername in <TT
CLASS="FILENAME"
>interfaces</TT
>.  There, it finds the machine name (or address) and port number to connect to, that is, the port where the database server is listening.</P
><DIV
CLASS="TIP"
><P
></P
><TABLE
CLASS="TIP"
WIDTH="100%"
BORDER="0"
><TR
><TD
WIDTH="25"
ALIGN="CENTER"
VALIGN="TOP"
><IMG
SRC="../images/tip.gif"
HSPACE="5"
ALT="Tip"></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><TABLE
CLASS="SIDEBAR"
BORDER="1"
CELLPADDING="5"
><TR
><TD
><DIV
CLASS="SIDEBAR"
><A
NAME="AEN6698"
></A
><P
><B
>How's that again?</B
></P
><P
>The <TT
CLASS="FILENAME"
>interfaces</TT
> file sometimes trips people up.  It seems innocuous enough, but it's also a pretty good example of <SPAN
CLASS="QUOTE"
>"it's easy if you know how"</SPAN
>.  Keep in mind:</P
><P
></P
><UL
><LI
STYLE="list-style-type: disc"
><P
>The <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>servername</I
></SPAN
> is the name of the database server.  When a database client specifies the <SPAN
CLASS="QUOTE"
>"name of the server"</SPAN
> to connect to, it's the <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>servername</I
></SPAN
> that is used.</P
></LI
><LI
STYLE="list-style-type: disc"
><P
>The <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>host name</I
></SPAN
> is the name of the host (machine) where the database server is running.  It has an IP address, and in almost any environment, you can <B
CLASS="COMMAND"
>ping</B
> the machine name to see if you've got it right.  After it uses the <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>servername</I
></SPAN
>  to look up the <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>host name</I
></SPAN
>, <SPAN
CLASS="PRODUCTNAME"
>FreeTDS</SPAN
> will do the same thing <B
CLASS="COMMAND"
>ping</B
> does to get the IP address of the machine to connect to.</P
></LI
><LI
STYLE="list-style-type: disc"
><P
>Finally, the <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>port number</I
></SPAN
> is frequently overlooked.  From the network's point of view, knowing the IP address without the port number is a little like knowing the address of an apartment building without knowing the apartment number.  In both cases, it will be hard to find what you came for.  Make sure you <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>know</I
></SPAN
> the port number, and that it's correctly entered in the <TT
CLASS="FILENAME"
>interfaces</TT
> file.</P
></LI
></UL
></DIV
></TD
></TR
></TABLE
></TD
></TR
></TABLE
></DIV
></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="interfaceslocation.htm"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="index.htm"
ACCESSKEY="H"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="interfacesformat.htm"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>Where it goes</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="interfacesfile.htm"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>What it looks like</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>

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Code Editor : interfacespurpose.htm