Ports Used
This page lists the default port ranges used by Infinite Scale services. It is for administrators configuring firewalls, load balancers or reverse proxies. You should be familiar with basic networking.
2 min read · Level: beginner · Last updated for oCIS 9.0.0-rc.1 on 25.10.2026
Introduction
Infinite Scale uses ports for communication between services. This page provides an overview of default port ranges.
Used Port Ranges
The following port ranges are used by services:
| Port Range | Service |
|---|---|
9000-9010 |
|
9100-9104 |
|
9105-9109 |
|
9110-9114 |
|
9115-9119 |
|
9120-9124 |
|
9125-9129 |
|
9130-9134 |
|
9135-9139 |
|
9140-9141 |
|
9142-9143 |
|
9144-9145 |
|
9146-9147 |
|
9148-9149 |
|
9150-9153 |
|
9154-9156 |
|
9157-9159 |
|
9160-9162 |
|
9163 |
ocdav (also see port 9350) |
9164 |
|
9165 |
|
9166-9169 |
|
9170-9174 |
|
9175-9179 |
|
9180-9184 |
FREE (formerly used by accounts) |
9185-9189 |
|
9190-9194 |
|
9195-9197 |
|
9198-9199 |
|
9200-9204 |
|
9205-9209 |
|
9210-9214 |
|
9215-9219 |
|
9220-9224 |
|
9225-9228 |
FREE |
9229 |
audit (debug server) |
9230-9234 |
|
9235-9239 |
|
9240-9244 |
|
9245-9249 |
|
9250-9254 |
|
9255-9259 |
|
9260-9264 |
|
9265-9269 |
|
9270-9274 |
|
9275-9279 |
|
9280-9284 |
|
9285-9289 |
|
9300-9304 |
|
9350-9354 |
FAQ
Which Port Do Clients Connect To?
Clients connect to the proxy on port 9200 (HTTPS). All other ports are for service-to-service communication on the internal network.
Do I Need to Open All These Ports Externally?
No. Only port 9200 (the proxy) needs to be reachable by clients. The remaining ports are bound to 127.0.0.1 by default and are used for internal service communication; expose them only on a trusted internal network.
Where Can I Change a Service Port?
Each service port is configurable through its environment variables, for example PROXY_HTTP_ADDR for the proxy or GRAPH_HTTP_ADDR for the graph service. See the individual service pages.