287 lines
4.6 KiB
HTML
287 lines
4.6 KiB
HTML
<HTML
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>The /etc/sysconfig/network-scripts/ifcfg-ethN files</TITLE
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TITLE="The /etc/HOSTNAME file"
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>Securing and Optimizing Linux: RedHat Edition -A Hands on Guide</TH
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>Chapter 9. Files -Networking Functionality</TD
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><H1
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><A
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NAME="AEN5998"
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>9.2. The <TT
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CLASS="filename"
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>/etc/sysconfig/network-scripts/ifcfg-ethN</TT
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> files</A
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></H1
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><P
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> File configurations for each network device you may have or want to add on your system are located in the <TT
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CLASS="filename"
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>/etc/sysconfig/network-scripts/</TT
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> directory with Red Hat Linux 6.1 or 6.2 and
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are named <TT
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CLASS="literal"
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>ifcfg-eth0</TT
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> for the first interface and <TT
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CLASS="literal"
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>ifcfg-eth1</TT
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> for the second, etc.
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Following is a example <TT
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CLASS="filename"
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>/etc/sysconfig/network-scripts/ifcfg-eth0</TT
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> file:
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</P
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><DIV
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CLASS="informalexample"
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><A
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NAME="AEN6006"
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></A
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><P
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></P
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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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> DEVICE=eth0
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IPADDR=208.164.186.1
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NETMASK=255.255.255.0
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NETWORK=208.164.186.0
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BROADCAST=208.164.186.255
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ONBOOT=yes
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BOOTPROTO=none
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USERCTL=no
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</PRE
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></TD
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></TR
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></TABLE
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><P
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></P
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></DIV
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><P
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> If you want to modify your network address manually, or add a new network on a new interface, edit this file -<TT
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CLASS="literal"
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>ifcfg-ethN</TT
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>, or create a new one and make the appropriate changes.
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<P
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></P
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><UL
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><LI
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><P
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> DEVICE=devicename, where devicename is the name of the physical network device.
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</P
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></LI
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><LI
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><P
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> IPADDR=ipaddr, where ipaddr is the IP address.
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</P
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></LI
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><LI
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><P
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> NETMASK=netmask, where netmask is the netmask IP value.
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</P
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></LI
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><LI
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><P
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> NETWORK=network, where network is the network IP address.
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</P
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></LI
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><LI
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><P
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> BROADCAST=broadcast, where broadcast is the broadcast IP address.
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</P
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></LI
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><LI
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><P
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> ONBOOT=answer, where answer is yes or no. <EM
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>Do the interface need to be active or inactive at boot time</EM
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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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> BOOTPROTO=proto, where proto is one of the following :
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<P
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></P
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><OL
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TYPE="i"
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><LI
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><P
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> none - No boot-time protocol should be used.
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</P
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></LI
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><LI
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><P
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> bootp - The bootp <EM
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>now pump</EM
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> protocol should be used.
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</P
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></LI
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><LI
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><P
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> dhcp - The dhcp protocol should be used.
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</P
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></LI
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></OL
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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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> USERCTL=answer, where answer is one of the following:
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<P
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></P
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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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> yes <EM
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>- Non-root users are allowed to control this device</EM
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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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> no <EM
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>- Only the super-user root is allowed to control this device</EM
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>.
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</P
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></LI
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></OL
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>
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</P
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></LI
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></UL
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>
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</P
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>The <TT
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CLASS="filename"
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>/etc/HOSTNAME</TT
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> file</TD
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