Windows 2019 Server sending reset after the client key exchange

senthil kumarasamy 0 Reputation points
2025-04-08T20:11:36.3333333+00:00

Hi ,

we have an API hosted in IIS10 and windows 2019 datacenter server, One of our client seeing intermittent reset connection the API request. API auth is based on mutual TLS. We verified supported TLS version and cipher suites. and ECC list(NistP256, curve25519, NistP384). In the packet capture we observed, reset happens after the client key exchange. when the DHC prams pubkey Length is 255, If we see pubkey Length 256, we don't see the reset issue. Could someone please help, what could be the problems?

Windows Server 2019
Windows Server 2019
A Microsoft server operating system that supports enterprise-level management updated to data storage.
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