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UC-7420/7410 User’s Manual Managing Communication
4-2
Telnet / FTP
In addition to supporting Telnet client/server and FTP client/server, the UC-7420/7410 system also
supports SSH and sftp client/server. To enable or disable the Telnet/ftp server, you first need to
edit the file
/etc/inetd.conf
.
Enabling the Telnet/ftp server
The following example shows the default content of the file /etc/inetd.conf. The default is to
enable the Telnet/ftp server:
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
Disabling the Telnet/ftp server
Disable the daemon by typing ‘#’ in front of the first character of the row to comment out the line.
DNS
UC-7420/7410 supports DNS client (but not DNS server). To set up DNS client, you need to edit
three configuration files:
/etc/hosts
,
/etc/resolv.conf
, and
/etc/nsswitch.conf
.
/etc/hosts
This is the first file that the Linux system reads to resolve the host name and IP address.
/etc/resolv.conf
This is the most important file that you need to edit when using DNS for the other programs. For
example, before you using #ntpdate time.nist.goc to update the system time, you will need to add
the DNS server address to the file. Ask your network administrator which DNS server address you
should use. The DNS server’s IP address is specified with the “nameserver” command. For
example, add the following line to /etc/resolv.conf if the DNS server’s IP address is 168.95.1.1:
nameserver 168.95.1.1
10.120.53.100 – PuTTY
root@Moxa:/etc# cat resolv.conf
#
# resolv.conf This file is the resolver configuration file
# See resolver(5).
#
#nameserver 192.168.1.16
nameserver 168.95.1.1
nameserver 140.115.1.31
nameserver 140.115.236.10
root@Moxa:/etc#
/etc/nsswitch.conf
This file defines the sequence to resolve the IP address by using /etc/hosts file or /etc/resolv.conf.
Web Service—Apache
The Apache web server’s main configuration file is /etc/apache/httpd.conf, with the default
homepage located at /usr/www/html/index.html. Save your own homepage to the following
directory:
/usr/www/html/
Save your CGI page to the following directory: