Oracle szkolenia

Oracle Listener

Wystartowanie oracle listener nie jest wymagane tylko przy lokalnym połączeniu z bazą w innych przypadka jest wymagane żeby listener był wystartowany tzn. przy połączeniu zdalnym a także lokalnym lub zdalnym korzystając z protokołu HTTP.
Defaultowe porty można zmienić podczas instalacji a także po zakończonej instalacji, z powodów bezpieczeństwa należy zawsze zmieniać nr portu na inny niz 1521 lub 8080 dla HTTP.

Połączenie HTTP z defaultu jest zablokowane, czyli po zakończonej instalacji nie możemy się połączyć używając HTTP, możemy bardzo łatwo to odblokować.

Listener możemy kłaść a także stawiać uruchamiając odpowiednie polecenia,

- startowanie listenera: lsnrctl start

- stopowanie: lsnrctl stop

w dowolnym momencie możemy sprawdzić status listenera komendą: lsnrctl status.

Jeżeli listener jest wystartowany to komenda pokarze nam raport z którego możemy się dowiedzieć na jakich portach listener nasłuchuje dla Oracle NET jak i dla HTTP.

Możemy także sprawdzić czy proces listenera chodzi przez sprawdzenie procesów za pomocą polecenie

ps -ef|grep lsn (oczywiście w środowisku UNIX/Linux).

Tak jak pisałem możemy zmienić port listenera w pliku listener.ora,

po takiej zmianie należy pamiętać żeby maszyny klienckie używały nowego portu.

Oczywiście nalezy pamiętać także ze po zmianie portu restart procesu listenera jest wymagany.

Tags: linux, lokalne połączenie, lsnrctl start, lsnrctl status, lsnrctl stop, oracle listener, porty, powody bezpieczeństwa, protokoł HTTP, restart listenera, unix, wystartowany listener, zablokowany port

This entry was posted on środa, czerwiec 25th, 2008 at 21:12 and is filed under szkolenia z oracle. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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Oracle Listener

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