622 lines
8.4 KiB
HTML
622 lines
8.4 KiB
HTML
<HTML
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>Clean-up and Test the new chrooted jail</TITLE
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>Securing and Optimizing Linux: RedHat Edition -A Hands on Guide</TH
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>Prev</A
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>Chapter 21. Software -Networking</TD
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WIDTH="10%"
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ALIGN="right"
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>Next</A
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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="AEN11242"
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>21.8. Clean-up and Test the new chrooted jail</A
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></H1
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><P
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> Remove the unnecessary files and directory.
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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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>rm</B
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> -f /usr/sbin/named
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[root@deep] /# <B
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CLASS="command"
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>rm</B
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> -f /usr/sbin/named-xfer
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[root@deep] /# <B
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CLASS="command"
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>rm</B
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> -f /etc/named.conf
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[root@deep] /# <B
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CLASS="command"
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>rm</B
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> -rf /var/named/
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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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We remove the <TT
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CLASS="literal"
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>named</TT
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> and <TT
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CLASS="literal"
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>named-xfer</TT
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> binaries from the <TT
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CLASS="filename"
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>/usr/sbin</TT
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> directory, since the ones we'll work with now on a daily basis are located under the
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chroot directory. The same applies for the <TT
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CLASS="filename"
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>named.conf</TT
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> file and <TT
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CLASS="filename"
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>/var/named</TT
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> directory.
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</P
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><P
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> We must test the new chrooted jail configuration of our <SPAN
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CLASS="acronym"
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>ISC</SPAN
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> <SPAN
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CLASS="acronym"
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>BIND</SPAN
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>/<SPAN
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CLASS="acronym"
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>DNS</SPAN
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> software.
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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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> The first thing to do is to restart our syslogd daemon with the following command:
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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] /# /etc/rc.d/init.d/syslog <B
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CLASS="command"
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>restart</B
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>
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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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<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="literallayout"
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><TT
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CLASS="computeroutput"
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> Shutting down kernel logger: [ OK ]
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Shutting down system logger: [ OK ]
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Starting system logger: [ OK ]
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Starting kernel logger: [ OK ]
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</TT
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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, start the new chrooted jail <SPAN
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CLASS="acronym"
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>ISC</SPAN
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> <SPAN
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CLASS="acronym"
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>BIND</SPAN
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>/<SPAN
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CLASS="acronym"
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>DNS</SPAN
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> with the following command:
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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] /# /etc/rc.d/init.d/named start
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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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<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="literallayout"
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><TT
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CLASS="computeroutput"
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> Starting named: [ OK ]
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</TT
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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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> Make sure it's running as user <TT
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CLASS="literal"
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>named</TT
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> and with the new arguments.
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To verify that <SPAN
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CLASS="acronym"
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>ISC</SPAN
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> <SPAN
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CLASS="acronym"
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>BIND</SPAN
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>/<SPAN
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CLASS="acronym"
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>DNS</SPAN
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> is running as user <TT
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CLASS="literal"
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>named</TT
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> with the new arguments, use the following command:
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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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>ps</B
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> auxw | <B
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CLASS="command"
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>grep</B
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> named
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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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<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="literallayout"
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><TT
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CLASS="computeroutput"
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> named 11446 0.0 1.2 2444 1580 ? S 23:09 0:00 /chroot/named/usr/sbin/named -t /chroot/named/ -unamed -gnamed
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</TT
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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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The first column should be <TT
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CLASS="literal"
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>named</TT
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>, which is the <SPAN
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CLASS="acronym"
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>UID</SPAN
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> named daemon is running under. The end of the line should be <B
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CLASS="command"
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>named</B
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> -t /chroot/named/ -unamed -gnamed, which
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are the new arguments.
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</P
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></LI
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><LI
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><P
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> Please dont forget to cleanup:
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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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>rm</B
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> -rf /var/tmp/src bind-src.tar.gz
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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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This will remove the source file and tar archive we used to compile and install <SPAN
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CLASS="acronym"
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>ISC</SPAN
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> <SPAN
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CLASS="acronym"
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>BIND</SPAN
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>/<SPAN
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CLASS="acronym"
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>DNS</SPAN
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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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><P
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> Further documentation, for more details there are several man pages you can read:
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<P
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></P
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><DIV
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CLASS="variablelist"
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><DL
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><DT
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><SPAN
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CLASS="citerefentry"
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><SPAN
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CLASS="refentrytitle"
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>dnsdomainname</SPAN
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>(1)</SPAN
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></DT
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><DD
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><P
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> - show the system's <SPAN
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CLASS="acronym"
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>DNS</SPAN
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> domain name
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</P
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></DD
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><DT
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><SPAN
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CLASS="citerefentry"
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><SPAN
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CLASS="refentrytitle"
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>dnskeygen</SPAN
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>(1)</SPAN
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></DT
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><DD
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><P
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> - generate public, private, and shared secret keys for <SPAN
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CLASS="acronym"
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>DNS</SPAN
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> Security
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</P
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></DD
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><DT
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><SPAN
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CLASS="citerefentry"
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><SPAN
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CLASS="refentrytitle"
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>dnsquery</SPAN
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>(1)</SPAN
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></DT
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><DD
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><P
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> - query domain name servers using resolver
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</P
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></DD
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><DT
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><SPAN
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CLASS="citerefentry"
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><SPAN
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CLASS="refentrytitle"
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>named</SPAN
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>(8)</SPAN
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></DT
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><DD
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><P
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> - Internet domain name server <SPAN
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CLASS="acronym"
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>DNS</SPAN
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>
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</P
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></DD
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><DT
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><SPAN
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CLASS="citerefentry"
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><SPAN
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CLASS="refentrytitle"
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>hesiod_to_bind [hesiod]</SPAN
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>(3)</SPAN
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></DT
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><DD
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><P
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> - Hesiod name server interface library
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</P
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></DD
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><DT
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><SPAN
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CLASS="citerefentry"
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><SPAN
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CLASS="refentrytitle"
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>ldconfig</SPAN
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>(8)</SPAN
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></DT
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><DD
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><P
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> - determine run-time link bindings
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</P
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></DD
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><DT
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><SPAN
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CLASS="citerefentry"
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><SPAN
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CLASS="refentrytitle"
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>lesskey</SPAN
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>(1)</SPAN
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></DT
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><DD
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><P
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> - specify key bindings for less
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</P
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></DD
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><DT
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><SPAN
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CLASS="citerefentry"
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><SPAN
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CLASS="refentrytitle"
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>raw</SPAN
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>(8)</SPAN
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></DT
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><DD
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><P
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> - bind a Linux raw character device
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</P
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></DD
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><DT
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><SPAN
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CLASS="citerefentry"
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><SPAN
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CLASS="refentrytitle"
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>mkfifo</SPAN
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>(1)</SPAN
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></DT
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><DD
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><P
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> - make FIFOs <EM
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>named pipes</EM
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>
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</P
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></DD
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><DT
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><SPAN
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CLASS="citerefentry"
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><SPAN
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CLASS="refentrytitle"
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>named-bootconf</SPAN
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>(8)</SPAN
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></DT
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><DD
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><P
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> - convert name server configuration files
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</P
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></DD
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><DT
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><SPAN
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CLASS="citerefentry"
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><SPAN
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CLASS="refentrytitle"
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>named-xfer</SPAN
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>(8)</SPAN
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></DT
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><DD
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><P
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> - ancillary agent for inbound zone transfers
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</P
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></DD
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><DT
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><SPAN
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CLASS="citerefentry"
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><SPAN
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CLASS="refentrytitle"
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>named.conf [named]</SPAN
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>(5)</SPAN
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></DT
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><DD
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><P
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> - configuration file for
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</P
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></DD
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><DT
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><SPAN
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CLASS="citerefentry"
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><SPAN
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CLASS="refentrytitle"
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>Opcode</SPAN
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>(3)</SPAN
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></DT
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><DD
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><P
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> - Disable named opcodes when compiling perl code
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</P
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></DD
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><DT
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><SPAN
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CLASS="citerefentry"
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><SPAN
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CLASS="refentrytitle"
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>dig</SPAN
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>(1)</SPAN
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></DT
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><DD
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><P
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> - send domain name query packets to name servers
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</P
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></DD
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><DT
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><SPAN
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CLASS="citerefentry"
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><SPAN
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CLASS="refentrytitle"
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>nslookup</SPAN
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>(8)</SPAN
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></DT
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><DD
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><P
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> - query Internet name servers interactively
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</P
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></DD
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><DT
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><SPAN
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CLASS="citerefentry"
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><SPAN
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CLASS="refentrytitle"
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>ndc</SPAN
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>(8)</SPAN
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></DT
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><DD
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><P
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> - name daemon control program
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</P
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></DD
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></DL
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></DIV
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>
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</P
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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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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="chap21sec168.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="chap21sec170.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"
|
|
VALIGN="top"
|
|
>The syslog daemon</TD
|
|
><TD
|
|
WIDTH="34%"
|
|
ALIGN="center"
|
|
VALIGN="top"
|
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><A
|
|
HREF="soft-netwrkng.html"
|
|
>Up</A
|
|
></TD
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="right"
|
|
VALIGN="top"
|
|
>DNS Administrative Tools</TD
|
|
></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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> |