(Ooctober 20, 2022)

Though it has on several occasions harshly criticized Russia’s actions in Ukraine, Jerusalem has so far avoided providing direct military aid to Kyiv — neither offensive arms nor advanced defensive technology — in an attempt to avoid sparking a crisis with Moscow.
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An encrypted phone connection was installed in 2017 between a Russian air base in western Syria and the Israeli Air Force command center in Tel Aviv.

The S-300 system was moved to Syria is 2018. Control of the batteries was never handed over to Syrian government.
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Russia still maintains its more advanced S-400 air defense system in Syria, but the missiles are reportedly tasked only with defending Russian assets.