Moxa Technologies EM-1240-LX - Manual (Page 35)

EM-1240-LX User’s Manual Configuring EM-1240-LX
4-2
Enabling and Disabling Daemons
The following daemons are enabled when the EM-1240-LX boots up for the first time.
y
SNMP Agent daemon:
snmpd
y Telnet Server / Client daemon: telnetd
y
Internet Daemons:
inetd
y
FTP Server / Client daemon: ftpd
y WWW Server daemon: boa
ATTENTION
How to enable/disable telnet/ftp server
a. Edit the file ‘/etc/inetd.conf’
Example (default enable):
discard dgram udp wait root /bin/discard
discard stream tcp nowait root /bin/discard
telnet stream tcp nowait root /bin/telnetd
ftp stream tcp nowait root /bin/ftpd -l
b. Disable the daemon by typing ‘#’ in front of the first character of the row.
How to enable/disable /etc/inittab www server
a. Edit the file ‘/etc/inittab’
b. Disable the www service by typing “#” in front of the first character of the row.
How to enable Network Time Protocol
ntpdate is a time adjusting client utility. The EM-1240-LX plays the role of Time client, and
sends requests to the Network Time Server to request the correct time.
Set the time server address for adjusting the system time with the command:
/>ntpdate ntp_server_ip
Save the system time to the hardware’s real time clock, with the command:
/>hwclock -w
Visit http://www.ntp/org for a recommended public NTP server list.
How to update the system time periodically via Network Time Protocol
1. Create a shell script file that includes the following description.
#!/bin/sh
ntpdate ntp_server_ip
hwclock –w
sleep 100
Å The min time is 100ms.
2. Save and make this shell script executable by typing
chmod 755 <shell-script_name>
Edit the file ‘/etc/inittab’ by adding the following line:
ntp: unknown: /directory/<shell_script_name>