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Planning
Planning is critical to a successful deployment. Many deployment problems, growth problems, and capacity problems occur because not enough time is taken to carefully plan a deployment. Plan your IBM® Sametime® installation by determining features needed, reviewing system requirements, determining capacity requirements, and the servers and computers needed for your deployment.
System and infrastructure requirements
Sametime® system and infrastructure requirements include network planning, policy planning, password and parameter planning and planning for single sign-on.
Ports
IBM® Sametime® uses a number of ports. There are ports for connecting server to servers, clients to servers, and WebSphere Application Server ports to configure. The topics in this section list the default ports and their uses, and ports to open in firewalls. A range of ports means that the application can select any port in that range if one or more of those ports are already in use by other applications.
TURN Server ports
This topic provides information for UDP and TCP port 3478 for TURN and STUN protocol handling. This UDP port should be reachable by internal and external clients.

TURN Server ports

This topic provides information for UDP and TCP port 3478 for TURN and STUN protocol handling. This UDP port should be reachable by internal and external clients.

Table 1. Sametime® TURN Server ports
Default Port	Purpose
3478	UDP and TCP, for basic STUN and TURN protocol handling. This UDP port should be reachable by internal and external clients. TCP port can be disabled by default and should be opened only if UDP traffic is forbidden due to company policy. Port 3478 is the default port for the TURN Server. If your network has other requirements, see Enabling HTTP Connect Tunneling for audio and video calls. These port numbers must not be subject to third-party load balancing, packet rewriting (NAT/PAT), or other network-layer manipulation.