Combine bread flour, dry yeast, sugar, and salt in a bowl and mix.
Add warm water and knead the dough.
Let the dough rise for the first fermentation.
Divide the dough, shape into rounds, and poke a hole in the center.
Let it rise for the second fermentation.
Blanch the bagels in boiling water.
Bake in an oven preheated to 180°C (356°F).