Open inbound port for redirected channel

Server

Client

1521 2008

TCP: Connection Request

Redirect Port d 1030

1521 2008

TCP: Connection Request

Redirect Port d 1030

TCP: Tear down

TCP: Connection Request

©2000, Cisco Systems,

SQL*Net only uses one channel for communications but it could be redirected to a different port, and even more commonly to a different secondary server altogether. When a client first starts an SQL*Net connection, it opens a standard TCP channel from one of its high-order ports to port 1521 on the server. The server then proceeds to redirect the client to a different port or IP address. The client tears down the initial connection and establishes the second connection.

For SQL*Net traffic, the PIX Firewall behaves in the following manner:

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