Oracle WebLogic Server 11g Administration Handbook

Listen Ports and Listen Threads

Listen ports listen for connection requests, and as connections come in the listen thread assigned by the server to the listen port accepts the connection requests, establishes connections, and hands the requests over to the socket muxer.

By default, Oracle WebLogic Server uses two listen ports to listen to incoming requests for connections. The first listen port, which I'll call a normal listen port, will accept any type of request—administrative as well as user requests. The normal listen port accepts connections from various protocols such as HTTP, t3, IIOP, COM, LDAP, and SNMP. When you start up a WebLogic Server instance, it starts listening on two different ports. The first one is a normal plaintext port, ...