Allied Telesis AT-S99 - Manual (Page 70)

Chapter 3: Starting a Management Session
70
Assigning an IP
Address
Configuration
and Changing the
Community
Strings
The management card has to be assigned an IP address configuration to
perform these management functions:
ˆ Remote Telnet, web browser, or SNMP management
ˆ Sending event messages to a syslog server
ˆ Setting the date and time from a Network Time Protocol server
ˆ Sending SNMP traps to trap receivers.
ˆ Uploading or downloading files to a TFTP server.
ˆ Pinging a remote device.
The IP address configuration has to consist of a unique IP address and a
subnet mask. The configuration must also include a default gateway
address if the management card and the network devices (e.g., syslog
server or TFTP server) are located on different networks. This address is
the IP address of the router interface that represents the first hop to
reaching the remote networks where the devices reside.
Since a management card with an IP address configuration is vulnerable
to unauthorized access from an intruder with an SNMP program, you
should change the card’s SNMP community strings to protect the card and
the chassis. If an intruder were to learn the IP address and the community
strings of the management card, he could use an SNMP application
program to gain access to the card, without having to know the password
to the manager account.
The IP address configuration of the management card can be assigned
manually or, since the management card has a DHCP client, from a DHCP
server on your network.
To assign the management card an IP address configuration and to
change the SNMP community strings:
1. From the Main Menu, select Configuration.
2. From the Configuration Menu, select System Configuration.
3. From the System Configuration Menu, select IP Parameters to display
the IP Parameters Menu.
4. To manually assign an IP address configuration to the management
card, enter values for the IP address, Subnet mask, and Gateway
address parameters. When entering the values, observe the following
guidelines:
ˆ The values have to be entered in this format: xxx.xxx.xxx.xxx.
ˆ The DHCP client has to be disabled.
ˆ To delete a value without assigning a new value, enter 0.0.0.0.