Linux DHCP service Setup

the construction of Linux DHCP

View IP address information:ifconfig eth0 ifconfig-a(view all)

View host name:hostname

View tcp/udp port:netstat-anptu-a(All) - n(digital) - P(process) - t(tcp) - u(UDP)

Tracking network nodes:traceroute

To view DNS resource records:nslookup

Configure IP address (temporary):

Ifconfig eth0 IP address

Ifconfig eth0:1 IP address

Configure host Name:hostname hostname

Configure default gateway:route add default GW gateway address

Delete:route del default GW gateway address

Set network parameters (fixed)

Modify /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE: Sets the name of the network interface

Onboot: Set whether the network interface is Activated when the Linux system starts

Bootproto: Setting the network interface configuration static(static) DHCP(dynamic)

IPADDR: Set the IP address of the network interface

NETMASK: Subnet mask

Gateway: setting up Gateways

Modify host Name:/etc/sysconfig/network

Set the DNS server address (preferred and alternate DNS) to modify /etc/resolv.cof add: NameServer 202.10.0.20 (preferred) nameserver 202.106.151.46 (standby)

DHCP Service Setup

1. Install the package (on the Linux system installation CD)

Query: rpm-qa | grep dhcp

Installation: RPM-IVH DHP

Service script:/ETC/INIT.D/DHCPD

Master configuration file:/etc/dhcp/dhcpd.conf

Protocol port: DUP(server) UDP ( client ) query:netstat-anpu

Dhcp Template:cp/usr/share/doc/dhcp-4.1.1/dhcpd.conf.sample/etc/dhcp/dhcpd.conf

Modified:subnet 192.168.1.0 netmask 255.255.255.0 {

Range 192.168.1.100 192.168.1.200; ( define address pool )

Option subent-mask 255.255.255.0; ( define subnet mask )

Otpion routers 192.168.1.1; ( define Gateway )

Option dpmain-name-servers 202.106.0.20; (define DNS service address)

}

Reserved address:

Host name {

Hardware Ethernet Keep the mac address of the host

Fixed-address 192.168.1.99; (Reserved IP)

}

Troubleshooting (View log):tail-30/var/log/messages

Linux clients get IPautomatically:dhclient-d eth0

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Linux DHCP service Setup