Zyxel OLT2412 [231/326] Access control overview

Zyxel OLT2412 [231/326] Access control overview
OLT2412 User’s Guide 231
CHAPTER 32
Access Control
This chapter describes how to control access to the OLT.
32.1 Access Control Overview
A console port and FTP are allowed one session each, Telnet and SSH share nine sessions, up to five
Web sessions (five different usernames and passwords) and/or limitless SNMP access control
sessions are allowed.
A console port access control session and Telnet access control session cannot coexist when multi-
login is disabled. See the Ethernet Switch CLI Reference Guide for more information on disabling
multi-login.
32.2 About SNMP
Simple Network Management Protocol (SNMP) is an application layer protocol used to manage and
monitor TCP/IP-based devices. SNMP is used to exchange management information between the
network management system (NMS) and a network element (NE). A manager station can manage
and monitor the OLT through the network via SNMP version one (SNMPv1), SNMP version 2c or
SNMP version 3. The next figure illustrates an SNMP management operation. SNMP is only available
if TCP/IP is configured.
Figure 59 SNMP Management Model
An SNMP managed network consists of two main components: agents and a manager.
Table 123 Access Control Overview
Console Port SSH Telnet FTP SNMP
One session Share up to nine sessions One session No limit

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