Allied Telesis AT-S63 - Manual (Page 96)

Chapter 4: SNMPv1 and SNMPv2c
96 Section I: Basic Operations
Default SNMP Community Strings
The AT-S63 Management Software provides two default community
strings: public and private. The public string has an access mode of just
Read and the private string has an access mode of Read/Write. If you
activate SNMP management on the switch, you should delete or disable
the private community string, which is a standard community string in the
industry, or change its status from open to closed to prevent unauthorized
changes to the switch.