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Possible causes of TCP RST

asked 2025-01-12 10:35:23 +0000

nonomer174 gravatar image

updated 2025-01-12 10:41:09 +0000

I was unable to access below website for sometime and could capture the packet and get TCP RST Waht are possible causes of TCP RST msg such below ?? [RST] Seq=2 Win=0 Len=0

Capture file for reference : https://drive.google.com/drive/folder...

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answered 2025-01-12 10:38:22 +0000

grahamb gravatar image

updated 2025-01-12 10:54:22 +0000

The endpoint sending the RST has decided that a RST is required. Often (mis)used by devices to quickly terminate a connection without bothering with the FIN, FIN ACK, ACK ending.

Now you've added a capture (thanks), you can see the server isn't happy about the connection attempt, initially sending a FIN but then when the client persists on sending a TLS "Client Hello" the server sends the RST, i.e. "Go way". The issue can likely be investigated by looking at the server logs.

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Asked: 2025-01-12 10:35:23 +0000

Seen: 37 times

Last updated: Jan 12