21.8. Connections performed during an IdM replica installation

Requests performed during an IdM replica installation lists the operations performed by ipa-replica-install, the Identity Management (IdM) replica installation tool.

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表 21.1. Requests performed during an IdM replica installation
Operation	Protocol used	Purpose
DNS resolution against the DNS resolvers configured on the client system	DNS	To discover the IP addresses of IdM servers
Requests to ports 88 (TCP/TCP6 and UDP/UDP6) on the discovered IdM servers	Kerberos	To obtain a Kerberos ticket
JSON-RPC calls to the IdM Apache-based web-service on the discovered or configured IdM servers	HTTPS	IdM client enrollment; replica keys retrieval and certificate issuance if required
Requests over TCP/TCP6 to port 389 on the IdM server, using SASL GSSAPI authentication, plain LDAP, or both	LDAP	IdM client enrollment; CA certificate chain retrieval; LDAP data replication
Requests over TCP/TCP6 to port 22 on IdM server	SSH	To check if the connection is working
(optionally) Access over port 8443 (TCP/TCP6) on the IdM servers	HTTPS	To administer the Certificate Authority on the IdM server (only during IdM server and replica installation)