將 /etc/snmpd/snmpd.conf 改成以下後 , service snmpd restart 後就可以了

rocommunity //community name (read-only)
syslocation //主機所在位置(說明)
syscontact //管理者 email

# sec.name source community
com2sec paranoid 127.0.0.1 public
#com2sec paranoid default public
#com2sec readonly default public
#com2sec readwrite default private

####
# Second, map the security names into group names:

# sec.model sec.name
group MyROSystem v1 paranoid
group MyROSystem v2c paranoid
group MyROSystem usm paranoid
group MyROGroup v1 readonly
group MyROGroup v2c readonly
group MyROGroup usm readonly
group MyRWGroup v1 readwrite
group MyRWGroup v2c readwrite
group MyRWGroup usm readwrite

####
# Third, create a view for us to let the groups have rights to:

# incl/excl subtree mask
view all included .1 80
view system included .iso.org.dod.internet.mgmt.mib-2.system

####
# Finally, grant the 2 groups access to the 1 view with different
# write permissions:

# context sec.model sec.level match read write notif
access MyROSystem "" any noauth exact all none none
#access MyROSystem "" any noauth exact system none none
access MyROGroup "" any noauth exact all none none
access MyRWGroup "" any noauth exact all all none