What is HTTP tunneling on port 80?
This topic explains HTTP tunneling on port 80 with IBM Lotus Sametime. If you have extended a Sametime server to Internet users, the configuration of a remote client’s firewall might prevent the client from connecting to the Sametime server. For example, to exchange presence and chat data with other clients in a meeting, a Sametime client connects to the Community Services on a Sametime server using TCP/IP port 1533 (by default). To exchange screen-sharing and whiteboard data, a Sametime client connects to the Meeting Services using TCP/IP port 8081 (by default). Many firewalls allow only HTTP connections on port 80 and will block the connection attempts that occur on ports 1533 and 8081. To establish connections in these environments, Sametime clients can automatically attempt a connection using HTTP tunneling over port 80. Using this tunneled connection, Sametime clients are able to communicate with the Community Services, Meeting Services, or Recorded Meeting Broadcast Services. The
