A sample snmpd.conf suitable for letting a remote system run cacti
syslocation System Location
syscontact an.email@a.system
# sec.name source community (password)
com2sec Mybox localhost public
com2sec cacti <you ip> public
com2sec Outside default public
# group.name sec.model sec.name
group RWGroup v2c Mybox
group ROGroup v1 cacti
group ROGroup v2c cacti
group Others v2c Outside
view all included .1 80
view system included system fe
# context sec.model sec.level prefix read write notif
access ROGroup "" any noauth exact all none none
access RWGroup "" v2c noauth exact all all all
access Others "" v2c noauth exact system none all
(
Source)
Bare minimum:
syslocation MyLocation
syscontact syscon@mydomain
rocommunity public
includeAllDisks 1
NOTE: no security. Enjoy!