How to Telnet to the E, C, T Series Printers, and the X Series Color and Monchrome MFPs; Available Telnet Functions

ENUS31686

Overview

This article provides:

  • Instructions on how to access a Telnet session.
  • Telnet behavior information.
  • Telnet features.

Why Telnet?

Telnet benefits:

  • Telnet may function as a secondary test to the PING; test for duplicate IP addresses.NOTE: Telnet access will not be consistent if duplicate IP addresses are found on the network.
  • Telnet failure may signify that firewall rules are blocking port 9000, or
  • Telnet failure may signify that someone has turned off Port 9000 via the printer embedded web server, or
  • Telnet may function as a test to determine why the printer embedded web server cannot be accessed.
  • Telnet provides remote network configuration if the print server's HTTP server is disabled.

How to access

From a command prompt (e.g. C:\), type telnetip_address9000, where ip_address is the TCP/IP address of the printer.

Telnet behavior and limitations

Configuration changes made through a Telnet session will not take effect on the print server until all Save (A) and Exit (X)selections are executed.

Telnet featuresMain Menu

Illustration

1. Set IP address options

Illustration

How to change configuration values

  1. Enter the number that corresponds to the configuration item of interest: IP address; netmask; gateway; DNS Server (1-4); WINS Server; Host name.

  2. Enter new value(s).

  3. Press Enter.

  4. Observation: The new value will be displayed, though it will not be sent to the printer.

  5. Select X to exit current menu.

  6. Select A to Save Changes.

  7. Select Y or N when the "Save confirmation" appears.

  8. Observation: Storing changes will appear.

  9. Select X again, in order to exit the Telnet menu. NOTE: Network connectivity will be lost if improper values are saved to the print server.

Value Entryillustration

2. Set IPv6 address options

Illustration

How to change configuration values See "Set IP address options" above.

3. Set IP Protocol Enables

Illustration

How to change enable value

  1. Enter the number that corresponds to the configuration item of interest:- HTTP Server - Prevents or grants access to the embedded web server.- FTP and TFTP - Prevents or grants access to an FTP session with the print server.

  2. Observation: Upon entering the number, you will see the value change from Enabled to Disabled.

  3. Select X to exit the current menu.

  4. Select A to Save Changes.

  5. Select Y or N when the "Save confirmation" appears.

  6. Observation: Storing changes will appear.

  7. Select X to exit current menu.

MenuNetworks/PortsStd Network SetupNetwork option 1STD Net SetupEnable HTTP serverSettingsSecurity TCP Port AccessTCP 80443Save


NOTE: If both ports are disabled you wont be able to access http or https and you will have to consider performing a full reset of the network adapter.

4. Set MTU (maximum transmission unit)

MTU Overview

  • The MTU is identified as the size of the largest packet or frame of data that is carried by a communications protocol. This data is carried between communication interfaces such as a NIC or a serial port.
  • Higher values bring higher efficiency. However, slow or busy networks may require a reduction in this value.
Illustration
Precaution: The default preset MTU value is optimal for most networks. Please contact the ISP or network administrator before changing this value.Implementation: -RC errors or CRC (Cyclic Redundancy Check) errors may be one instance where the MTU value may have to be decreased or increased in order to alleviate the issue.

5. Set Restricted Server List

OverviewHost IP addresses entered into this area will only be allowed access to the printer. This includes printing. Illustration

How to set restricted print server IP address values: See "Set IP address options" above.

6. Set LPD options

Illustration

How to change Enable/Disable value

    1. Enter the number that corresponds to the configuration item of interest: 1, 3, or 4.

    2. Observation: Upon entering the number, you will see the value change from Enabled to Disabled.

    3. Select X to exit the current menu.

    4. Select A to Save Changes.

    5. Select Y or N when the "Save confirmation" appears.

    6. Observation: Storing changes will appear.

    7. Select X to exit current menu.

LPD timeout overview

  • LPD timeout defines how long the port waits after receiving its last bit of print data. It can also define the amount of time it takes for the port to reset if receiving corrupt or incomplete print data. Moreover, it can define the time periods between port cycling.
  • Setting LPD timeout to 0 disables the timeout and allows the print server to wait indefinitely for the print job.Warning! This may cause undesirable effects that include the following:
    • The TCP/IP port never closes.
    • 'Busy Waiting' or related message will display on the printer LCD due to print jobs with an improper or absent end-of-job terminator.
    • A power cycle will be required in order to bring the printer back to a Ready state.
  • Decreasing this value will speed up port availability.
  • Increasing LPD timeout may help in busy network environments or with larger print jobs.
  • This setting, under Settings (Configuration) > Network/Ports > LPD Configuration, can also be adjusted through the embedded web server.

7. Set SNMP community name

Illustration

Changing the (Simple Network Messaging Protocol) community name may be requested or suggested if the printer or network is susceptible to network security threats or attacks.

8. Set Adapter Password

This password prevents unwanted configuration changes. It also blocks access to more critical functions on the printer or MFP.NOTE:MarkNet is the default UserName. Illustration of Incorrect Password Entry

Save and Exit

After making configuration changes in a Telnet session, you will need to exit (X) from the current menu and go back into the "Main Menu". Then select Save(A) changes. Lastly, you should select exit (X) one more time, in order to disconnect from the host. Exit Illustration

Save Illustration
2nd Exit Illustration:

Troubleshooting

No Port or Incorrect Port message: "Could not open connection to the host on port 23; Connect failed." Illustration

Wrong IP address or other network related message: "Could not open connection to the host on port 9000; Connect failed." Illustration

Still need help?

If you require additional assistance, please contact Lexmark Technical Support.
NOTE: When calling for support, you will need the machine/model type and serial number (SN) of your printer. Please call from near the computer and printer in case the technician on the phone asks you to perform a task on one or both of these devices.

LEGACY ID: SO4618

Notes:

  • Infoprint 1811 ----------------------------------------------------------------------------- Infoprint 1812 ----------------------------------------------------------------------------- Infoprint 1822 ----------------------------------------------------------------------------- Infoprint 1824 ----------------------------------------------------------------------------- Infoprint 1826 MFP ----------------------------------------------------------------------------- Infoprint 1832 ----------------------------------------------------------------------------- Infoprint 1852 ----------------------------------------------------------------------------- Infoprint 1872 ----------------------------------------------------------------------------- Infoprint 1850 MFP ----------------------------------------------------------------------------- Infoprint 1860 MFP ----------------------------------------------------------------------------- Infoprint 1870 MFP
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