
Port requirements
Hub Daemons
The zenhub daemon must run on every hub host.
Hub Daemons
Daemon Port Proto Dir Source / Destination Notes
zenhub 8081
1
8090
8789
1
5672 (AMQP)
8084
8085
11211 (memcache)
13306
TCP
TCP
TCP
TCP
TCP
TCP
TCP
TCP
IN
IN
IN
OUT
OUT
OUT
OUT
OUT
collector daemons
nginx
collector daemons
rabbitmq
zeneventserver
zencatalogservice
memcached
zends
XML-RPC
Graph rendering
“ZenHub”
zentune 5672 (AMQP)
8084
11211 (memcache)
13306
TCP
TCP
TCP
TCP
OUT
OUT
OUT
OUT
rabbitmq
zeneventserver
memcached
zends
1. The “ZenHub” and XML-RPC port numbers are specified when the hub is created. They default to the lowest port
numbers greater than 8789 and 8081, respectively, which are not being used by an existing hub.
Collector Daemons
Note that all collector daemons must be able to connect to their hub’s “ZenHub” and XML-RPC ports, which usually vary
from hub to hub. Most collector daemons do not need to be run if they are not required for monitoring the devices
assigned to the collector. Daemons marked with a dagger (†) must be run on every collector host.
Collector Daemons
Daemon Port Proto Dir Source / Destination Notes
zencommand 22 (SSH)
*
TCP OUT monitored devices
*See note 1.
zeneventlog 135 (EPMAP)
*
TCP
TCP
OUT
IN/OUT
monitored devices
monitored devices
*See notes 2 and 3.
zenjmx * TCP OUT monitored devices
*See note 4.
zenmailtx 25 (SMTP)
110 (POP3)
TCP
TCP
OUT
OUT
outgoing SMTP server
monitored POP3
service
zenmodeler† * * OUT monitored devices
*The port(s) and
protocol(s) used for
device modeling are
determined by which
modeler plugins have
been enabled for the
device(s) being modeled.
zenperfsnmp 161 (SNMP) UDP — monitored devices
zenping echo request
echo-reply
ICMP
ICMP
OUT
IN
monitored devices
monitored devices
Devices with a non-empty
IP address will periodically
be probed by the zenping
daemon by default. Set
the zPingMonitorIgnore
configuration property to
true (checked) to prevent
this behavior.
zenprocess 161 (SNMP) UDP — monitored devices
B-4
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