User's Manual
84
Document #: LTRT-10375
Mediant 500 MSBR
•
'Telnet Server Idle Timeout': Enter the duration of inactivity in the Telnet session
after which the session automatically ends.
•
'Allow WAN access to Telnet': Select Enable to enable Telnet from the WAN.
3.
Click
Apply
, and then reset the device with a save-to-flash for your settings to take
effect.
For a detailed description of the Telnet parameters, see Telnet Parameters on page 989.
8.1.2
Enabling SSH with RSA Public Key for CLI
Unless configured for TLS, Telnet is not secure as it requires passwords to be transmitted
in clear text. To overcome this, you can use Secure SHell (SSH) which is the de-facto
standard for secure CLI. SSH 2.0 is a protocol built above TCP providing methods for key
exchange, authentication, encryption, and authorization. SSH requires appropriate client
software for the management PC. Most Linux distributions have OpenSSH pre-installed;
Windows-based PCs require an SSH client software such as PuTTY, which can be
downloaded from http://www.chiark.greenend.org.uk/~sgtatham/putty/. By default, SSH
uses the same username and password as the device's Telnet and Web server. SSH
supports 1024/2048-bit RSA public keys, providing carrier-grade security.
Follow the instructions below to configure the device with an administrator RSA key as a
means of strong authentication.
To enable SSH and configure RSA public keys for Windows (using PuTTY SSH
software):
1.
Start the PuTTY Key Generator program, and then do the following:
a.
Under the Parameters group, do the following:
♦
Select the
SSH-2 RSA
option.
♦
In the 'Number of bits in a generated key' field, enter "1024" bits.
b.
Under the Actions group, click
Generate
and then follow the on-screen
instructions.
c.
Under the Actions group, click
Save private key
to save the new private key to a
file (*.ppk) on your PC.
Summary of Contents for Mediant 500 MSBR
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Page 837: ...Part X Status Performance Monitoring and Reporting ...
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Page 927: ...Part XI Diagnostics ...
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Page 977: ...Part XII Appendix ...
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