1. Move to Oracle Cloud Using Zero Downtime Migration
  2. Zero Downtime Migration Port Requirements

A Zero Downtime Migration Port Requirements

Zero Downtime Migration requires a means to access on-premises and Oracle Cloud hosts, and if SSH is used for host access, then port 22 access is required.

Table A-1 Zero Downtime Migration Communication Ports

Initiator Target Protocol Port Purpose Description
Zero Downtime Migration Service Host On-premises database hosts and Oracle Cloud hosts TCP 22 SSH Authentication-based operations to run Zero Downtime Migration operational phases

Source and Target servers should accept incoming connections from the Zero Downtime Migration service host.
On-premises database host Oracle Cloud hosts TCP 1521 SQL*Net Should allow Oracle client connections to the database over Oracle's SQL*Net protocol

Perform database queries, Data Guard sync, and configuration

Note: If you are using a non-default port number (that is, something other than port 1521) for the local listener address, then the non-default port should allow connections.

Oracle Cloud hosts On-premises database host TCP 1521 SQL*Net Should allow Oracle client connections to the database over Oracle's SQL*Net protocol

Allows redo log shipping if on-premises database needs to be in sync with the new primary on Oracle Cloud after switchover. If there is no communication possible from Oracle Cloud to on-premises host then set SKIP_FALLBACK to TRUE in the response file to avoid this communication.

Note: If you are using a non-default port number (that is, something other than port 1521) for the local listener address, then the non-default port should allow connections.

On-premises database host Oracle Cloud Object Store Service SSL 443 Database backup store. Create a backup of the on-premises database to the specified Oracle Cloud Object store container. If the chosen backup method involves Oracle Cloud Object Store Service as the backup medium, then access ports as documented Oracle Cloud Object Store Service applies.
Oracle Cloud database hosts Oracle Cloud Object Store Service SSL 443 Database backup store. Restore backup of the on-premises database from the specified Oracle Cloud Object store container to the Oracle Cloud hosts. If the chosen backup method involves Oracle Cloud Object Store Service as the backup medium, then access ports as documented Oracle Cloud Object Store Service applies.