Red Hat Linux Networking

 

Red Hat Linux Networking

 


 

Network Configuration

To use the Network Administration Tool, login in as user root and go to...

Main Menu Button | System Settings | Network

...or type the command "redhat-config-network" at a shell prompt. To run the text-based version, type "redhat-config-network-tui" command.

To configure network connections...

  1. Add the hardware device to the hardware list.
  2. Add a network device associated with the physical hardware device.
  3. Configure the hostname and DNS settings.
  4. Configure any hosts that cannot be looked up through DNS.

To verify your network device is compatible, vist the the Red Hat Hardware Compatibility List.

 

Establishing an Ethernet Connection

To add an Ethernet connection...

redhat-control-network | Devices | New | Ethernet connection | Forward

If you have already added the network interface card to the hardware list, select it from the Ethernet card list. Otherwise, select Other Ethernet Card to add the hardware device.

If this is the system's first Ethernet card, select eth0 as the device name; if this is the second Ethernet card, select eth1, etc...

If you associate more than one device with an Ethernet card, the subsequent devices are device aliases. A device alias allows you to setup multiple virtual devices for one physical device, thus giving the one physical device more than one IP address. For example, you can configure an eth1 device and an eth1:1 device.

 

Device Aliases

Device aliases are virtual devices associated with physical hardware and are commonly represented as the device name followed by a colon and a number (for example, eth0:1, eth0:1, eth0:2, etc...). They are primarily used if you want to have multiple IP addresses for a system, but the system only has one network card.

After configuring the Ethernet device, such as eth0, go to...

Devices | New | ethernet_card

...set a static IP address for the alias, and then click Activate.

To verify that the alias has been activated, run /sbin/ifconfig. For example:

 eth0     Link encap:Ethernet  HWaddr 00:A0:CC:60:B7:G4
          inet addr:192.168.100.5  Bcast:192.168.100.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:161930 errors:1 dropped:0 overruns:0 frame:0
          TX packets:244570 errors:0 dropped:0 overruns:0 carrier:0
          collisions:475 txqueuelen:100
          RX bytes:55075551 (52.5 Mb)  TX bytes:178108895 (169.8 Mb)
          Interrupt:10 Base address:0x9000

eth0:1    Link encap:Ethernet  HWaddr 00:A0:CC:60:B7:G4
          inet addr:192.168.100.42  Bcast:192.168.100.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Interrupt:10 Base address:0x9000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:5998 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5998 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1627579 (1.5 Mb)  TX bytes:1627579 (1.5 Mb)

 

Activating Devices

Network devices can be configured to be active or inactive at boot time. For example, a network device for a modem connection is usually not configured to start at boot time; whereas, an Ethernet connection is usually configured to activate at boot time.

To activate devices, ...

redhat-control-network | Main | System Tools | Network Device Control

 

Establishing a CIPE Connection

CIPE stands for Crypto IP Encapsulation. It is used to configure an IP tunneling device. For example, CIPE can be used to grant access from the outside world into a Virtual Private Network (VPN). If you need to setup a CIPE device, contact your system administrator for the correct values.

 

Red Hat Network

Red Hat Network is an Internet solution for downloading and installing security alerts, bug fix alerts, and enhancement alerts (collectively known as Errata Alerts) through the RHN website (http://rhn.redhat.com/).

To use, create a System Profile by clicking through...

Main Menu Button | System Tools | Red Hat Network

...or by executing up2date from a shell prompt.

Everyone receives a free Red Hat Network account for one system. Additional accounts can be purchased.

Red Hat Linux includes the Red Hat Network Notification Tool, a panel icon that displays visible alerts when there is an update for your Red Hat Linux system.


 

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