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[lwip-users] TCP SYN to UDP port

From: Esa Hill
Subject: [lwip-users] TCP SYN to UDP port
Date: Thu, 14 Apr 2016 06:32:54 +0000



When nmap scan is executed against our device (LwIP 1.4.1), it responds with RST for SYN even when the socket/port is listening only UDP “connections”.


Is this correct behavior (does some RFC say something about this?) or should it just drop silently the SYN packet as it does for unused ports?

This came up in one certification process (they see it as a problem).



Esa Hill

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