Moxa DA-685-LX [21/76] Dynamic ip address using dhcp

DA-685 Linux Managing Communications

3-3

Dynamic IP Address using DHCP

To configure one or both LAN ports to request an IP address dynamically, replace static with dhcp and then

delete the rest of the lines.

After modifying the boot settings of the LAN interface, issue the following command to activate the LAN settings

immediately.

# /etc/init.d/networking restart

Adjusting IP Addresses with “ifconfig”

IP settings can be adjusted during run-time, but the new settings will not be saved to the flash ROM without

modifying the file /etc/network/interfaces. For example, type the command # ifconfig eth0

192.168.1.1 to change the IP address of LAN1 to 192.168.1.1.

Telnet/FTP Server

In addition to supporting Telnet client/server and FTP client/server, the DA-685-LX also supports SSH and sftp

client/server. To enable or disable the Telnet/ftp server, you need to edit the file /etc/inetd.conf.

1. Mount the root file system with write permission.

MOXA:~# mount -o remount,rw /

MOXA:~# ifconfig eth0 192.168.1.1

MOXA:~#

MOXA:~# /etc/init.d/networking restart

# The primary network interface

auto eth0

iface eth0 inet dhcp

# The loopback network interface

auto lo

iface lo inet loopback

# The primary network interface

auto eth0

iface eth0 inet static

address 192.168.3.127

netmask 255.255.255.0

broadcast 192.168.3.255

auto eth1

iface eth1 inet static

address 192.168.4.127

netmask 255.255.255.0

broadcast 192 168 4 255