DHCP

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DHCP

• DHCP

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DHCP
DHCP

• DHCP (Dynamic Host Configuration Protocol) is a
  network service that enables clients to obtain
  network settings (IP Address, Subnet Mask,
  Default Gateway, DNS Server, Hostname and Domain)
  automatically from a central server
• The DHCP client sends a broadcast request to find
  the DHCP server and the DHCP server in the subnet
  responds with an IP address (and other common
  network parameters) from a pool of IP addresses
• The IP address can be bound to the MAC address of
  the client
• Daemon dhcpd Lease file /var/lib/dhcp/dhcpd.lea
  ses

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DHCP Server Configuration
DHCP

• Configuration File /etc/dhcpd.conf
• subnet 172.28.0.0 netmask 255.255.0.0
• authoritative
• option routers 172.28.1.254
• option subnet-mask
  255.255.0.0
• option domain-name "iitk.ac.in"
• option domain-name-servers
  172.31.1.1
• range 172.28.4.2 172.28.7.254
• default-lease-time 7200
• max-lease-time 10800
• host tc1
• hardware ethernet
  0080641AE914
• fixed-address 172.28.120.32

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DHCP Client Configuration
DHCP

• Configure the Network Configuration to pickup
  network settings from DHCP server
• /etc/sysconfig/network-scripts/ifcg-eth0
• BOOTPROTOdhcp (static)
• Applications ? System Settings ? Network

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NIS Server Setup

• NIS SERVER SETUP

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Network Information Service
NIS Server Setup

• Directory Service for Centralized Authentication
  and Accounting
• The NIS server and all NIS clients are members of
  a NIS domain
• Single Master Server and Multiple Slave Servers
• Uses ypserv, yppasswdd and ypbind daemon (also
  uses portmap and rpc service)

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NIS Server Configuration
NIS Server Setup

• Edit File /etc/sysconfig/network and add
• NISDOMAINltmynisdomaingt
• Build NIS maps by running
• /usr/lib/yp/ypinit m
• (ypserv should be running)
• service ypserv start/stop/restart
• service yppasswdd start/stop/restart

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NIS Client Configuration
NIS Server Setup

• Specify NIS Server and NIS Domain
• /etc/yp.conf
• domain ltmynisdomaingt server ltnis server IPgt
• /etc/nsswitch.conf
• passwd files nis
• shadow files nis
• group files nis
• /etc/sysconfig/network
• NISDOMAINltmynisdomaingt
• service ypbind start/stop/restart

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NIS Troubleshooting
NIS Server Setup

• Use ypwhich to find and verify which server a
  client is bound to, if any
• Use ypcat to verify that correct NIS data is
  available.
• ypcat passwd more