Linux Basic Network Configuration

Linux Basic Network Configuration

2 experimental Environment:

The company requires that an idle Linux host be configured as a DHCP service to provide automatic assignment of IP address services to employees ' office computers in the LAN, and improve network management and maintenance efficiency. Two windows host tests.

2 Requirements Description:

? The host name of the DPCH server is Dhcpsvr.benet.com,ip address is 192.168.4.11/24

? Used to automatically assign the IP address range to 192.168.4.20~192.168.4.200 for each host in the LAN.

? The default gateway for each host in LAN is 192.168.4.1.

? The host names of the DNS server addresses for the 192.168.4.2 and 192.168.4.3.DNS servers used by each host on the LAN are ns1.benet.com and ns2.benet.com respectively.

? Network printer device (can find another Windows host in the network, perform Ipconfig/all view MAC address) host name is PRTSVR, require automatic allocation of fixed IP address 192.168.4.9

Experimental steps:

L DPCH Server host name Dhcpsvr.benet.com,ip address is 192.168.4.11/24

Let's start with the first step, changing the hostname and permanent IP address of the Linux server

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Figure 1

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Figure 2

After you delete the = number, enter the hostname you want to enter to save and exit. Hostname should be finished, but also need to restart the network card service, here we do not restart, we changed the IP address after the restart.

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Figure 3

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Figure 4

Above is the basic information of the network card, if your profile is missing one of them, add it manually, note must be capitalized

Note: BOOTPROTO=DHCP is automatically acquired and, if required, we want to change to static.

If you use dynamic addresses, all of the files you changed above are useless.

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Figure 5

After the NIC service restarts, let's see if it's successful. If the restart network card does not take effect, we can restart the host, it will be effective.

? Used to automatically assign the IP address range 192.168.4.20~192.168.4.200 to each host in the LAN. The default gateway for each host in the LAN is 192.168.4.1. The DNS server addresses used by each host on the LAN are 192.168.4.2 and 192.168.4.3.

We have to make these experiments together, or one effect is not very good

To implement the above, you need to install the DHCP service installation package in the rhel5.2 installation CD. We insert the disc.

Mount the disc to media

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Figure 6

Path in/media/server/

installation is possible.

A master configuration file is generated when the installation is complete/etc/dhcpd.conf

We can modify this master configuration file to do the DHCP service to dynamically assign the address.

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Figure 7

Linux Network Service basically each software will have a template file, as long as we will modify this file, we can build services, and start the service.

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Figure 8

R copy Copies the contents of this template file into the main configuration file, deleting comments and blank lines. Make changes

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Figure 9

We are modified after the middle of the space, can be deleted, I was to explain deliberately.

L Network printer Device (can find another Windows host within the network, perform Ipconfig/all view MAC address) host name is PRTSVR, require automatic allocation of fixed IP address 192.168.4.9

We did not make reservations just now, let's do it, open a WinXP change the hostname, Windows change the hostname I believe everyone will.

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Figure 10

Under the global configuration, there is a host NS record where the reserved address can be configured and we need the MAC address of XP

is not modified yet, let's change it now

Enter Ipconfig/all on XP to see the physical address of the NIC.

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Figure 11

To enter a good reserved address

We save the exit and start the DHCPD service to provide the service.

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Figure 12

Service has started, if the service can not start, 80 is a configuration file error, there is the IP address does not take effect.

Now the network card is changed to VM1 XP to automatically get the IP address, XP is now a printer, not a normal client, testing the printer after the success of our normal client testing

Virtual machine Note Close Virtual DHCP assignment address

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Figure 13

Successfully acquired.

We are opening an XP or Win7 for testing

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Figure 14

The WIN7 client obtains the network information, which is assigned from the back to the beginning

We are opening a Linux client for DHCP dynamic acquisition and a look at the lease process

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Figure 15
Modify the IP configuration file to do so.

Change the NIC to vm1 restart the NIC service.

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Figure 16

Get to the

Let's take a look at the lease process

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Figure 17

We saw the past process and the packages sent each step, as well as getting the IP address.

The Book of experimental cases we finished, the book recommended test steps, more cumbersome, and we do not have a DNS server so, I did not follow the steps of the book. Now we're done with the after-school experiment.

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1, the DHCP server network card type is set to VM1, the IP address is permanently set to 192.168.4.100, the host name is dhcpd.benet.com.

2. Set the address pool range to 192.168.4.10-192.168.4.150, the gateway to the 192.168.4.1,DNS server address is 202.106.0.20 and 202.106.148.1, set the reserved address for XP clients to 192.168.4.20.

3, with the host (native) as a client, to see if the VM1 network card can automatically obtain an IP address, the other options are correct? Does the XP client get a reserved address? (Note that turning off the virtual machine comes with the DHCP feature)

4. After restarting the DHCPD service, check whether the DHCPD service port is successfully opened to view the lease file.

In fact, after the experiment, far from the experimental case good, here we also do a bit.

L Experimental steps:

1, the DHCP server network card type is set to VM1, the IP address is permanently set to 192.168.4.100, the host name is dhcpd.benet.com.

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Figure 18

When modifying an IP address, be sure to modify the network segment, subnet mask, broadcast address.

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Figure 19

Modify host name, path is/etc/sysconfig/network

After the change has been restarted, no restart will not take effect, the experimental case we have done.

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Figure 20

Modification succeeded

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Figure 21

The configuration was successful.

2. Set the address pool range to 192.168.4.10-192.168.4.150, the gateway to the 192.168.4.1,DNS server address is 202.106.0.20 and 202.106.148.1, set the reserved address for XP clients to 192.168.4.20.

The requirement is to build a DHCP service

Steps, install the software. After the software installation is complete, modify the master configuration file

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Figure 22

or call a template file

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Figure 23

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Figure 24

Configuration complete

The reserved address is the address of XP

3, with the host (native) as a client, to see if the VM1 network card can automatically obtain an IP address, the option is correct? Does the XP client get a reserved address? (Note that turning off the virtual machine comes with the DHCP feature)

Restart DHCPD Service

XP Auto Get IP Address

Disabling virtual DHCP functionality

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Figure 25

The reserved address was obtained.

Take the real machine as a client to get an automatically assigned address.

Note Change to auto get

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Figure 26

Successfully acquired address

4. After restarting the DHCPD service, check whether the DHCPD service port is successfully opened to view the lease file.

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Figure 27

You can see that the DHCPD listener port is 67 service process number 6426 successfully opened

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Figure 28

For details of the lease, the reserved IP address is not displayed because it is permanent.

This is done, if you need a different network segment IP address need to add another network card, the master configuration file to add a global configuration, do not add a retention configuration.

Thank you! : Wq exit and SAVE!!!

Linux Basic Network configuration