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Moxa V2401-CE [32/108] Disabling the telnet ftp server
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V2401/2402 Series Linux User’s Manual Managing Communications
3-5
For example, use the following commands to set /dev/ttyM0 to RS-422:
The V2401-LX contains an additional RS-232 connector to connect eight RS-232 devices. The
corresponding device nodes in Linux are ttyM8 to ttyM15.
Telnet/FTP Server
In addition to supporting Telnet client/server and FTP client/server, the V2401/2402-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.
2. Type # cd /etc to change the directory.
3. Type # vi inetd.conf to edit the configuration file.
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:”
Disabling the Telnet/FTP Server
Disable the daemon by typing “#” in front of the first character of the row to comment out the line.
For example, to disable the FTP server, use the following commands:
MOXA:/ dev# setinterface /dev/ttyM0
Usage: setinterface device-node [interface-no]
device-node - /dev/ttyM0 ～ /dev/ttyM3
interface-no - following:
0 - set to RS232 interface
1 - set to RS485-2 WIRES interface
2 - set to RS422 interface
3 - set to RS885-4 WIRES interface
MOXA:/ dev# setinterface /dev/ttyM0 0
MOXA:/ dev# setinterface /dev/ttyM0 2
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
MOXA:~# mount -o remount,rw /dev/
s
d
a
1
/
MOXA:~# cd /etc
MOXA:/etc# vi inetd.conf
Содержание
- First edition march 2010 1
- V2401 2402 series linux user s manual 1
- Www moxa com product 1
- Copyright notice 2
- Disclaimer 2
- Technical support contact information 2
- Trademarks 2
- V2401 2402 series linux user s manual 2
- Www moxa com support 2
- Table of contents 3
- Introduction 5
- Device driver 6
- Hardware 6
- Linux kernel 6
- Micro kernel 6
- Overview 6
- Protocol stack 6
- Software specifications 6
- Software components 7
- Software configuration 8
- Starting from a vga console 9
- Desktop display configuration 10
- Connecting from a telnet console 14
- Connecting from an ssh console 15
- Windows users 15
- Adjusting the system time 16
- Linux users 16
- Setting the time manually 16
- Example shell script for updating the system time periodically 17
- Ntp client 17
- Updating the time automatically 17
- Enabling and disabling daemons 18
- How to run the shell script automatically when the kernel boots up 18
- Setting the run level 22
- Cron daemon for executing scheduled commands 23
- Inserting a usb storage device into the computer 24
- Apt installing and removing packages 25
- Checking the linux version 25
- Device suspend 27
- Managing communications 28
- Changing the interfaces configuration file 30
- Changing the network settings 30
- Static ip address 30
- Adjusting ip addresses with ifconfig 31
- Dynamic ip address using dhcp 31
- Serial port operation mode 31
- Disabling the telnet ftp server 32
- Enabling the telnet ftp server 32
- Telnet ftp server 32
- Dns client 33
- Etc hostname 33
- Etc nsswitch conf 34
- Etc resolv conf 34
- Apache web server 35
- Default homepage 35
- Disabling the cgi function 35
- Saving web pages to a usb storage device 36
- Filter table includes three chains 38
- Iptables 38
- Nat table includes three chains 38
- Process 38
- Mangle table includes two chains 39
- Sub tables 39
- 13 3 13 40
- Iptables hierarchy 40
- The following figure shows the iptables hierarchy 40
- V2401 2402 series linux user s manual managing communications 40
- Iptables modules 41
- Define policy for chain rules 42
- Observe and erase chain rules 42
- Append or delete rules 43
- Nat example 44
- Nat network address translation 44
- Enabling nat at bootup 45
- Connecting to a ppp server over a simple dial up connection 46
- Ppp point to point protocol 46
- Checking the connection 47
- Connecting to a ppp server over a hard wired link 47
- Setting up a machine for incoming ppp connections 49
- Nfs network file system client 54
- Snmp simple network management protocol 55
- Ethernet bridging for private networks on different subnets 56
- Openvpn 56
- Ethernet bridging for private networks on the same subnet 61
- Routed ip 62
- Programmer guide 64
- Device api 65
- Rtc real time clock 65
- Example to get the baudrate 66
- Example to set the baudrate 66
- Baudrate inaccuracy 67
- Digital i o 67
- Special note 67
- Dio program source code file example 69
- Examples 69
- Special note 69
- System recovery 74
- Recovery environment 75
- Recovery procedure 75
- In this example m is the usb disk drive number 76
- A software component list 84
- Software component list 84
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