On Wed, 6 Nov 2019, Subrata Dasgupta via curl-library wrote:
CURL is sending HTTP requests with do not fragment bit ON of IP layer. So
when packet size is more than MTU then those packets are dropped by the
routers.
curl doesn't do that by itself.
That's not a decision made by curl, that's decided and done by the TCP stack.
From what I understand, that bit is typically set for MTU discovery.
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