332 lines
4.7 KiB
HTML
332 lines
4.7 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>Configure the /etc/ftphosts file</TITLE
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.60"><LINK
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REL="HOME"
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TITLE="Securing and Optimizing Linux"
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HREF="index.html"><LINK
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TITLE="Linux FTP Server"
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HREF="ftpd.html"><LINK
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TITLE="Configurations"
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HREF="chap29sec297.html"><LINK
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TITLE="Configure the /etc/ftpconversions file"
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HREF="chap29sec299.html"></HEAD
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><TR
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><TH
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>Securing and Optimizing Linux: RedHat Edition -A Hands on Guide</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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><A
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HREF="chap29sec297.html"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 32. Linux <TT
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CLASS="literal"
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>FTP</TT
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> Server</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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HREF="chap29sec299.html"
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>Next</A
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="section"
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><H1
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CLASS="section"
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><A
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NAME="AEN23132"
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>32.5. Configure the <TT
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CLASS="filename"
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>/etc/ftphosts</TT
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> file</A
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></H1
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><P
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> The <TT
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CLASS="filename"
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>/etc/ftphosts</TT
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> file is used to define whether users are allowed to log in from certain hosts or whether there are denied access.
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</P
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><DIV
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CLASS="procedure"
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><OL
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TYPE="1"
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><LI
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><P
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> Create the <TT
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CLASS="filename"
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>ftphosts</TT
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> file, <B
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CLASS="command"
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>touch</B
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> <TT
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CLASS="filename"
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>/etc/ftphosts</TT
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> and add for example in this file the following lines:
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<TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><PRE
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CLASS="programlisting"
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> # Example host access file
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#
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# Everything after a '#' is treated as comment,
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# empty lines are ignored
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allow ftpadmin 208.164.186.1 208.164.186.2 208.164.186.4
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deny ftpadmin 208.164.186.5
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</PRE
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></TD
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></TR
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></TABLE
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>
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In the example below, we allow the user <TT
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CLASS="literal"
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>ftpadmin</TT
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> to connect via <TT
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CLASS="literal"
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>FTP</TT
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> from the explicitly listed addresses <TT
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CLASS="literal"
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>208.164.186.1</TT
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> <TT
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CLASS="literal"
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>208.164.186.2 </TT
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><TT
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CLASS="literal"
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>208.164.186.4,</TT
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> and
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deny the specified <TT
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CLASS="literal"
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>ftpadmin</TT
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> user to connect from the site <TT
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CLASS="literal"
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>208.164.186.5.</TT
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>
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</P
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></LI
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><LI
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><P
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> Now, change its default permission to be <TT
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CLASS="literal"
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>600</TT
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>:
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<TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><PRE
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CLASS="screen"
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> [root@deep ] /# <B
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CLASS="command"
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>chmod</B
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> 600 /etc/ftphosts
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</PRE
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></TD
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></TR
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></TABLE
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>
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</P
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></LI
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></OL
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></DIV
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><DIV
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CLASS="section"
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><H2
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CLASS="section"
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><A
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NAME="AEN23156"
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>32.5.1. Configure the <TT
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CLASS="filename"
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>/etc/ftpusers</TT
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> file</A
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></H2
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><P
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> The <TT
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CLASS="filename"
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>/etc/ftpusers/</TT
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> file specifies those users that are <EM
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>NOT</EM
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> allowed to connect to your <TT
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CLASS="literal"
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>FTP</TT
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> server.
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</P
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><DIV
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CLASS="procedure"
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><OL
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TYPE="1"
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><LI
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><P
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> Create the <TT
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CLASS="filename"
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>ftpusers</TT
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> file, <B
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CLASS="command"
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>touch</B
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> <TT
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CLASS="filename"
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>/etc/ftpusers</TT
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> and add in this file the following users for security reasons:
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<TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><PRE
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CLASS="programlisting"
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> root
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bin
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daemon
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adm
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lp
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sync
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shutdown
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halt
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mail
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news
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uucp
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operator
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games
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nobody
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</PRE
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></TD
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></TR
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></TABLE
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>
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</P
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></LI
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><LI
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><P
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> Now, change its default permission to be <TT
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CLASS="literal"
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>600</TT
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>:
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<TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><PRE
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CLASS="screen"
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> [root@deep ] /# <B
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CLASS="command"
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>chmod</B
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> 600 /etc/ftpusers
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</PRE
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></TD
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></TR
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></TABLE
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>
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</P
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></LI
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></OL
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></DIV
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></DIV
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></DIV
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="chap29sec297.html"
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>Prev</A
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></TD
|
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><TD
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WIDTH="34%"
|
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="index.html"
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>Home</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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><A
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HREF="chap29sec299.html"
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>Next</A
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></TD
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></TR
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><TR
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><TD
|
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WIDTH="33%"
|
|
ALIGN="left"
|
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VALIGN="top"
|
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>Configurations</TD
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|
><TD
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WIDTH="34%"
|
|
ALIGN="center"
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VALIGN="top"
|
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><A
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HREF="ftpd.html"
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>Up</A
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></TD
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><TD
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WIDTH="33%"
|
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ALIGN="right"
|
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VALIGN="top"
|
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>Configure the <TT
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CLASS="filename"
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>/etc/ftpconversions</TT
|
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> file</TD
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></TR
|
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></TABLE
|
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></DIV
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></BODY
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></HTML
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> |