Qtech QSW-2900-24T-AC [33/209] The number of telnet user restriction

2-31

When mask in reserve is 0.0.0.0, it means host address, and 255.255.255.255 means all hosts. Use the no command

to delete corresponding item.

For example:

! Configure ip address allowed by telnet management system to be 192.168.0.0/255.255.0.0

QTECH(config)#login-access-list telnet 192.168.0.0 0.0.255.255

QTECH(config)#no login-access-list telnet 0.0.0.0 255.255.255.255

Use show login-access-list command to display all ip address allowed by web, snmp, telnet management

system.

show login-access-list

2.4.6 The number of Telnet user restriction

Configure the max number of Telnet users. This function can restrict the number of Telnet user (0-5) to enter

privileged mode at the same time. The user logged in without entering privileged mode will not be restricted but

restricts by the max number. Administrator and super user will not be restricted and can be logged in through series

interface. Display the configuration by show users command.

Configure it in global configuration mode:

no login-access-list telnet-limit

Example:

! Configure only 2 Telnet users can enter privileged mode

QTECH(config)#login-access-list telnet-limit 2

2.4.7 Routing tracert command

Tracert is used for routing detecting and network examination. Configure it in privileged mode:

tracert [ -u | -c ] [ -p udpport | -f first_ttl | -h maximum_hops | -w time_out ] target_name

Parameter:

-u means sending udp packet,

-c means sending echo packet of icmp. It is defaulted to be -c;

-p udpport:destination interface address for sending udp packet which is in the range of 1 to 65535 and

defaulted to be 62929;

-f first_ttl:initial ttl of sending packet which is in the range of 1 to 255 and defaulted to be 1;

-h maximum_hops:the max ttl of sending packet which is in the range of 1 to 255 and defaulted to be 30;

-w time_out:the overtime of waiting for the response which is in the range of 10 to 60 with the unit of second and

default to be 10 seconds;

target_name:destination host or router address

Example:

! Tracert 192.168.1.2

QTECH#tracert 192.168.1.2