The Dorala system was a Federation Alliance-held star system during the Dominion War.

During the Dominion War in 2374, General Martok reported to Captain Benjamin Sisko that three Klingon cruisers were bolstering up the defense perimeter of the Dorala system. Sisko was pleased by the news, stating that he just hoped they could hold out until Starfleet could send reinforcements. He was assured that the Klingons would hold out until their arrival. (DS9: "The Reckoning")

This system was only mentioned in dialogue.
According to Star Trek: Star Charts (p. 64) and Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), the Dorala system was located in the Beta Quadrant. The system's primary was a F-class star.
The Star Trek Encyclopedia (4th ed., vol. 1, p. 216) located this system, which the authors called a region, in the Alpha Quadrant.

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