Striim 4.0.4 documentation

Narrowing the ZeroMQ port range

Striim uses ZeroMQ for communication among servers and Forwarding Agents.

By default, ZeroMQ uses the port range 49152-65535. To narrow that range, on each server in the cluster, edit striim/conf/, find the line # ZMQ_PORT_RANGE=49152-65535, remove the #, and set the ports as desired. Do not set the low value below 49152 or the high value above 65535.

Firewall settings:

  • Striim servers must allow inbound access for this range

  • systems on which Forwarding Agents are running must allow outbound access for this range

Then restart the server, as described in Starting and stopping Striim.