Very slow synchronization of miners

Hello everybody! Miners take an extremely long time to synchronize, even when using snapshots (which cannot be found up-to-date), the speed is about 80-100 blocks per night. Is there any way to speed this up? Do I need to open any ports for this if I’m behind NAT?

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u need open UDP port at Routes.

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Since then, many new versions have been released, and now synchronization is much faster even without open ports.

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