3com WX2200 3CRWX220095A User Manual

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Managing the Management Services
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Managing the 
Management 
Services
MSS provides the following services for managing a WX switch over the 
network: 
„
Secure Shell (SSH) — SSH provides a secure connection to the CLI 
through TCP port 22.
„
Telnet — Telnet provides a nonsecure connection to the CLI through 
TCP port 23.
„
HTTPS — HTTPS provides a secure connection to the Web 
management application through TCP port 443.
SSH is enabled by default. Telnet and HTTPS are disabled by default. 
A WX switch can have up to eight Telnet or SSH sessions, in any 
combination, and one Console session. A WXR100 can have up to four 
Telnet or SSH sessions, in any combination, and one Console session.
Managing SSH
MSS supports Secure Shell (SSH) Version 2. SSH provides secure 
management access to the CLI over the network. SSH requires a valid 
username and password for access to the switch. When a user enters a 
valid username and password, SSH establishes a management session 
and encrypts the session data.
Login Timeouts
When you access the SSH server on a WX switch, MSS allows you 10 
seconds to press Enter for the username prompt. After the username 
prompt is displayed, MSS allows 30 seconds to enter a valid username 
and password to complete the login. If you do not press Enter or 
complete the login before the timer expires, MSS ends the session. These 
timers are not configurable. 
To ensure that all CLI management sessions are encrypted, after you 
configure SSH, disable Telnet.
Enabling SSH
SSH is enabled by default. To disable or reenable it, use the following 
command:
set ip ssh server {enable | disable}