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As per this answer TCP keepalive can be enabled by three registry values. However, setting KeepAliveInterval=KeepAliveInterval=30000 miliseconds and TCPMaxDataRetransmissions=5 definitely does not result in any keepalive packets judging by Wireshark capture.

Should it work at all on Windows 10? Is there any other way to do that on OS TCP stack level? Is it configurable?

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  • My Windows machine NICs stay on permanently (24x7 wired and wireless) What might you have done?
    – anon
    Commented Aug 25, 2023 at 15:17
  • @John: I don't think the question is about NICs staying on? It's about TCP connections periodically checking whether the other end of the connection is still on.
    – grawity_u1686
    Commented Aug 25, 2023 at 15:42
  • No issues here with TCP staying on all the time.
    – anon
    Commented Aug 25, 2023 at 15:43
  • @John no issues if you own all the hardware between you and remote host and know how it is configured. That's rarely the case.
    – Pyotr Baykalov
    Commented Aug 27, 2023 at 13:29
  • Never an issue with remote connection either nearby or over VPN.
    – anon
    Commented Aug 27, 2023 at 13:31

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