SSH/Telnet/Logging

To configure services:

  1. Complete or view the following:

System Logging

SSH

Telnet

Audit Log

SMTP

Web SSH/Web Telnet Settings

Phone Home

System Logging

Alert Levels

Select one of the following alert levels from the drop-down list for each message category:

Off: Disables this type of logging.

Error: Saves messages that are output because of an error.

Warning: Saves message output from a condition that may be cause for concern, in addition to error messages. This is the default for all message types.

Info: Saves informative message, in addition to warning and error messages.

Debug: Saves extraneous detail that may be helpful in tracking down a problem, in addition to information, warning, and error messages.

Network Level

Messages concerning the network activity, for example about Ethernet and routing.

Services

Messages concerning services such as SNMP and SMTP.

Authentication

Messages concerning user authentication.

Device Ports

Messages concerning device ports and connections.

Diagnostics

Messages concerning system status and problems.

General

Any message not in the categories above.

Remote Servers (#1 and #2)

IP address of the remote server(s) where system logs are stored.

The system log is always saved to local SLC or SLB storage. It is retained through SLC or SLB unit reboots for files up to 200K. Saving the system log to a server that supports remote logging services (see RFC 3164) allows the administrator to save the complete system log history.

SSH

Enable Logins

Enables or disables SSH logins to the SLC or SLB unit to allow users to access the CLI using SSH. Enabled by default.

This setting does not control SSH access to individual device ports. (Device Ports – Settings provides information on enabling SSH access to individual ports.)

Most system administrators enable SSH logins, which is the preferred method of accessing the system.

Web SSH

Enables or disables the ability to access the SLC or SLB command line interface or device ports (connect direct) through a web SSH window. Disabled by default.

Timeout

If you enable SSH logins, you can cause an idle connection to disconnect after a specified number of minutes. Select Yes and enter a value of from 1 to 30 minutes.

Note: You must reboot the unit before a change will take effect.

SSH Port

Allows you to change the SSH login port to a different value in the range of 1 - 65535. The default is 22.

Note: You must reboot the unit before a change will take effect.

SSH V1 Logins

Enables or disables SSH version 1 incoming connections to the SLC or SLB unit. Enabled by default.

Note: Disabling SSH V1 blocks Web SSH CLI and Web SSH to device port connections on the SLC/SLB Network page. Also, you must reboot the SLC or SLB unit before a change will take effect.

DSA Keys

Enables or disables support for DSA keys for incoming and outgoing connections for the SLC or SLB unit. Any imported or exported DSA keys will be retained but will not be visible on the web or the CLI. Enabled by default.

Telnet

Enable Logins

Enables or disables Telnet logins to the SLC or SLB unit to allow users to access the CLI using Telnet. Disabled by default.

This setting does not control Telnet access to individual device ports. (Device Ports – Settings provides information on enabling Telnet access to individual ports.)

You may want to keep this option disabled for security reasons.

Web Telnet

Enables or disables the ability to access the SLC or SLB command line interface or device ports (connect direct) through a web Telnet window. Disabled by default.

Timeout

If you enable Telnet logins, you can cause an idle connection to disconnect after a specified number of minutes. Select Yes and enter a value of from 1 to 30 minutes.

Note: You must reboot the unit before a change will take effect.

Escape Sequence

A single character or a two-character sequence that causes the SLC or SLB unit to terminate a Telnet client. Currently the Escape Sequence is only used for Web Telnet sessions.

The default value is Esc+T (escape key, then uppercase "T" performed quickly but not simultaneously). You would specify this value as \x1bT, which is hexadecimal (\x) character 27 (1B) followed by a T. A control character can be specified with the hexidecimal number for the control character; for example, Control-E can be specified as \x05. Note that some browsers do not report key press events if Control is pressed for non-alphanumeric keys, so it is recommended to only use letters with Control character sequences.

Outgoing
Telnet

Enables or disables the ability to create Telnet out connections.

Audit Log

Enable Log

Select to save a history of all configuration changes in a circular log. Disabled by default. The audit log is saved through SLC or SLB unit reboots.

Size

The log has a default maximum size of 50 Kbytes (approximately 500 entries). You can set the maximum size of the log from 1 to 500 Kbytes.

Include CLI Commands

Select to cause the audit log to include the CLI commands that have been executed. Disabled by default.

Include In System Log

If enabled, the contents of the audit log are added to the system log (under the General/Info category/level). Disabled by default.

SMTP

Server

IP address of your network’s Simple Mail Transfer Protocol (SMTP) relay server.

Sender

The email address of the sender of outgoing emails. The strings "$host" and "$domain" can be part of the email address - they will be substituted with the actual hostname and domain. The default is donotreply@$host.$domain.

Web SSH/Web Telnet Settings

Terminal Buffer Size

Number of lines in the Web SSH or Web Telnet terminal window that are available for scrolling back through output.

Phone Home

Enable

If enabled, the SLC or SLB unit will attempt to phone home every hour until it has contacted an SLM device and provided it with its configuration.

IP Address

IP address of the SLM unit.

Last Attempt

(display only)

Date and time of last connection attempt.

Results

(display only)

Indicates whether the attempt was successful.

 

  1. To save, click Apply.

 

See also

Services

NFS and SMB/CIFS

Secure Lantronix Network

Date and Time