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Connection goes FIN,ACK after PSH, ACK

Hi, i need help to identify what could be the problem that causes this issue, i've tried a lot stuff but nothing helped, the rare thing is that one computer that i don't have has connected to the device witch is a KT400 but the server from were i tried can't, so i think it could be the SO or some configuration in it.

Windows server 2016.

4842 10.762676 10.100.57.27 10.100.57.100 TCP 60 51960 → 18802 [RST] Seq=2 Win=0 Len=0 4843 10.763309 10.100.57.27 10.100.57.100 TCP 62 51961 → 18802 [SYN] Seq=0 Win=32768 Len=0 MSS=1460 SACK_PERM=1 4844 10.763396 10.100.57.100 10.100.57.27 TCP 62 18802 → 51961 [SYN, ACK] Seq=0 Ack=1 Win=8192 Len=0 MSS=1460 SACK_PERM=1 4845 10.763840 10.100.57.27 10.100.57.100 TCP 60 51961 → 18802 [ACK] Seq=1 Ack=1 Win=33580 Len=0 4846 10.764501 10.100.57.27 10.100.57.100 TCP 95 51961 → 18802 [PSH, ACK] Seq=1 Ack=1 Win=33580 Len=41 4935 10.819760 10.100.57.100 10.100.57.27 TCP 54 18802 → 51961 [ACK] Seq=1 Ack=42 Win=64240 Len=0 12100 26.804255 10.100.57.100 10.100.57.27 TCP 54 18802 → 51961 [FIN, ACK] Seq=1 Ack=42 Win=64240 Len=0 12101 26.804834 10.100.57.27 10.100.57.100 TCP 60 51961 → 18802 [ACK] Seq=42 Ack=2 Win=33580 Len=0 12542 27.784711 10.100.57.27 10.100.57.100 TCP 60 51961 → 18802 [FIN, ACK] Seq=42 Ack=2 Win=33580 Len=0 12543 27.784783 10.100.57.100 10.100.57.27 TCP 54 18802 → 51961 [ACK] Seq=2 Ack=43 Win=64240 Len=0 12544 27.785242 10.100.57.27 10.100.57.100 TCP 60 51961 → 18802 [RST] Seq=43 Win=0 Len=0

Connection goes FIN,ACK after PSH, ACK

Hi, i need help to identify what could be the problem that causes this issue, i've tried a lot stuff but nothing helped, the rare thing is that one computer that i don't have has connected to the device witch is a KT400 but the server from were i tried can't, so i think it could be the SO or some configuration in it.

Windows server 2016.

4842    10.762676   10.100.57.27    10.100.57.100   TCP 60  51960 → 18802 [RST] Seq=2 Win=0 Len=0
4843    10.763309   10.100.57.27    10.100.57.100   TCP 62  51961 → 18802 [SYN] Seq=0 Win=32768 Len=0 MSS=1460 SACK_PERM=1
4844    10.763396   10.100.57.100   10.100.57.27    TCP 62  18802 → 51961 [SYN, ACK] Seq=0 Ack=1 Win=8192 Len=0 MSS=1460 SACK_PERM=1
4845    10.763840   10.100.57.27    10.100.57.100   TCP 60  51961 → 18802 [ACK] Seq=1 Ack=1 Win=33580 Len=0
4846    10.764501   10.100.57.27    10.100.57.100   TCP 95  51961 → 18802 [PSH, ACK] Seq=1 Ack=1 Win=33580 Len=41
4935    10.819760   10.100.57.100   10.100.57.27    TCP 54  18802 → 51961 [ACK] Seq=1 Ack=42 Win=64240 Len=0
12100   26.804255   10.100.57.100   10.100.57.27    TCP 54  18802 → 51961 [FIN, ACK] Seq=1 Ack=42 Win=64240 Len=0
12101   26.804834   10.100.57.27    10.100.57.100   TCP 60  51961 → 18802 [ACK] Seq=42 Ack=2 Win=33580 Len=0
12542   27.784711   10.100.57.27    10.100.57.100   TCP 60  51961 → 18802 [FIN, ACK] Seq=42 Ack=2 Win=33580 Len=0
12543   27.784783   10.100.57.100   10.100.57.27    TCP 54  18802 → 51961 [ACK] Seq=2 Ack=43 Win=64240 Len=0
12544   27.785242   10.100.57.27    10.100.57.100   TCP 60  51961 → 18802 [RST] Seq=43 Win=0 Len=0

Len=0

Connection goes FIN,ACK after PSH, ACK

Hi, i need help to identify what could be the problem that causes this issue, i've tried a lot stuff but nothing helped, the rare thing is that one computer that i don't have has connected to the device witch is a KT400 but the server from were i tried can't, so i think it could be the SO or some configuration in it.

Windows server 2016.

4842    10.762676   10.100.57.27    10.100.57.100   TCP 60  51960 → 18802 [RST] Seq=2 Win=0 Len=0
 4843    10.763309   10.100.57.27    10.100.57.100   TCP 62  51961 → 18802 [SYN] Seq=0 Win=32768 Len=0 MSS=1460 SACK_PERM=1
 4844    10.763396   10.100.57.100   10.100.57.27    TCP 62  18802 → 51961 [SYN, ACK] Seq=0 Ack=1 Win=8192 Len=0 MSS=1460 SACK_PERM=1
 4845    10.763840   10.100.57.27    10.100.57.100   TCP 60  51961 → 18802 [ACK] Seq=1 Ack=1 Win=33580 Len=0
 4846    10.764501   10.100.57.27    10.100.57.100   TCP 95  51961 → 18802 [PSH, ACK] Seq=1 Ack=1 Win=33580 Len=41
 4935    10.819760   10.100.57.100   10.100.57.27    TCP 54  18802 → 51961 [ACK] Seq=1 Ack=42 Win=64240 Len=0
 12100   26.804255   10.100.57.100   10.100.57.27    TCP 54  18802 → 51961 [FIN, ACK] Seq=1 Ack=42 Win=64240 Len=0
 12101   26.804834   10.100.57.27    10.100.57.100   TCP 60  51961 → 18802 [ACK] Seq=42 Ack=2 Win=33580 Len=0
 12542   27.784711   10.100.57.27    10.100.57.100   TCP 60  51961 → 18802 [FIN, ACK] Seq=42 Ack=2 Win=33580 Len=0
 12543   27.784783   10.100.57.100   10.100.57.27    TCP 54  18802 → 51961 [ACK] Seq=2 Ack=43 Win=64240 Len=0
 12544   27.785242   10.100.57.27    10.100.57.100   TCP 60  51961 → 18802 [RST] Seq=43 Win=0 Len=0