Polycom (RMX) 1500 User Manual

RealPresence Collaboration Server (RMX) 1500/1800/2000/4000 Administrator’s Guide 

Polycom®, Inc. 

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The following table summarizes the port numbers and their usage in the RealPresence Collaboration Server 
(RMX) 1500/1800/2000/4000:

HTTP

80

TCP

Management between the 
Collaboration Server and 
Collaboration Server Web Client.

No

HTTPS

443

TCP

Secured Management between the 
Collaboration Server and 
Collaboration Server Web Client.

No

DNS

53

UDP

Domain name server.

Can be disabled in the IP 
Network Service.

DHCP

68

UDP

Dynamic Host Configuration 
Protocol.

Can be disabled in the IP 
Network Service.

SSH

22

TCP

Secured shell. It is the Collaboration 
Server terminal.
SSH is not supported when the 
Collaboration Server is in Ultra 
Secure Mode. For more information 
see 

No

NTP

123

UDP

Network Time Protocol. Enables 
access to a time server on the 
network.

No

H.323 GK RAS

1719

UDP

Gatekeeper RAS messages traffic.

No

H.323 Q.931

1720 - 
incoming;
49152-599
99 - 
outgoing

TCP

H.323 Q.931 call signaling.
Each outgoing call has a separate 
port.
The port for each outgoing call is 
allocated dynamically.

Yes - for outgoing calls 
only.
It is configured in the 
Fixed Ports section of the 
IP service.

H.323 H.245

49152 - 
59999

TCP

H.245 control.
Each outgoing call has a separate 
port.
The port for each outgoing call is 
allocated dynamically. It can be 
avoided by tunneling.

Yes - for outgoing calls 
only.
It is configured in the 
Fixed Ports section of the 
IP service.