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Help with TLS1.2 connection issue

Hi experts,

We have a problem with a .net web app trying to connect to some Web Service. We are not sure what is going on. I am not sure if this is a TLS1.2 connection issue or something else. I have this WireShark trace summary. I can see the client sending a FIN request but not sure if this the TLS 1.2 handshake finished OK or not:

733 6.169095 Application .Net IP mid tier IP(WS) TCP 66 55137 > https [SYN, ECN, CWR] Seq=0 Win=8192 Len=0 MSS=1410 WS=256 SACK_PERM=1

735 6.170224 Application .Net IP mid tier IP(WS) TCP 54 55137 > https [ACK] Seq=1 Ack=1 Win=1048832 Len=0

736 6.170889 Application .Net IP mid tier IP(WS) TLSv1.2 243 Client Hello

737 6.173031 mid tier IP(WS) Application .Net IP TLSv1.2 1464 Server Hello

738 6.173137 mid tier IP(WS) Application .Net IP TLSv1.2 1359 Certificate, Server Key Exchange, Server Hello Done

739 6.173149 Application .Net IP mid tier IP(WS) TCP 54 55137 > https [ACK] Seq=190 Ack=2716 Win=1048832 Len=0

740 6.178450 Application .Net IP mid tier IP(WS) TLSv1.2 236 Client Key Exchange, Change Cipher Spec, Encrypted Handshake Message

741 6.179193 mid tier IP(WS) Application .Net IP TLSv1.2 400 Encrypted Handshake Message, Change Cipher Spec, Encrypted Handshake Message

742 6.184131 Application .Net IP mid tier IP(WS) TLSv1.2 2843 Application Data

743 6.184425 mid tier IP(WS) Application .Net IP TCP 60 https > 55137 [ACK] Seq=3062 Ack=3161 Win=2097920 Len=0

758 6.293462 mid tier IP(WS) Application .Net IP TLSv1.2 715 Application Data

759 6.309837 Application .Net IP mid tier IP(WS) TCP 54 55137 > https [ACK] Seq=3161 Ack=3723 Win=1047808 Len=0

760 6.359905 Application .Net IP mid tier IP(WS) TCP 54 55137 > https [FIN, ACK] Seq=3161 Ack=3723 Win=1047808 Len=0

761 6.360152 mid tier IP(WS) Application .Net IP TCP 60 https > 55137 [ACK] Seq=3723 Ack=3162 Win=2097920 Len=0 762 6.360256 mid tier IP(WS) Application .Net IP TLSv1.2 139 Encrypted Alert

763 6.360260 mid tier IP(WS) Application .Net IP TCP 60 https > 55137 [FIN, ACK] Seq=3808 Ack=3162 Win=2097920 Len=0

764 6.360300 Application .Net IP mid tier IP(WS) TCP 54 55137 > https [RST, ACK] Seq=3162 Ack=3808 Win=0 Len=0

765 6.360335 Application .Net IP mid tier IP(WS) TCP 54 55137 > https [RST] Seq=3162 Win=0 Len=0

Help with TLS1.2 connection issue

Hi experts,

733 6.169095 Application .Net IP mid tier IP(WS) Application .Net IP mid tier IP(WS) TCP 66 55137 > https [SYN, ECN, CWR] Seq=0 Win=8192 Len=0 MSS=1410 WS=256 SACK_PERM=1 SACK_PERM=1 735 6.170224 Application .Net IP mid tier IP(WS) Application .Net IP mid tier IP(WS) TCP 54 55137 > https [ACK] Seq=1 Ack=1 Win=1048832 Len=0 Len=0 736 6.170889 Application .Net IP mid tier IP(WS) Application .Net IP mid tier IP(WS) TLSv1.2 243 Client Hello Hello 737 6.173031 mid tier IP(WS) Application .Net IP mid tier IP(WS) Application .Net IP TLSv1.2 1464 Server Hello Hello 738 6.173137 mid tier IP(WS) Application .Net IP mid tier IP(WS) Application .Net IP TLSv1.2 1359 Certificate, Server Key Exchange, Server Hello Done Done 739 6.173149 Application .Net IP mid tier IP(WS) Application .Net IP mid tier IP(WS) TCP 54 55137 > https [ACK] Seq=190 Ack=2716 Win=1048832 Len=0 Len=0 740 6.178450 Application .Net IP mid tier IP(WS) Application .Net IP mid tier IP(WS) TLSv1.2 236 Client Key Exchange, Change Cipher Spec, Encrypted Handshake Message Message 741 6.179193 mid tier IP(WS) Application .Net IP mid tier IP(WS) Application .Net IP TLSv1.2 400 Encrypted Handshake Message, Change Cipher Spec, Encrypted Handshake Message Message 742 6.184131 Application .Net IP mid tier IP(WS) Application .Net IP mid tier IP(WS) TLSv1.2 2843 Application Data Data 743 6.184425 mid tier IP(WS) Application .Net IP mid tier IP(WS) Application .Net IP TCP 60 https > 55137 [ACK] Seq=3062 Ack=3161 Win=2097920 Len=0 Len=0 758 6.293462 mid tier IP(WS) Application .Net IP mid tier IP(WS) Application .Net IP TLSv1.2 715 Application Data Data 759 6.309837 Application .Net IP mid tier IP(WS) Application .Net IP mid tier IP(WS) TCP 54 55137 > https [ACK] Seq=3161 Ack=3723 Win=1047808 Len=0 Len=0 760 6.359905 Application .Net IP mid tier IP(WS) Application .Net IP mid tier IP(WS) TCP 54 55137 > https [FIN, ACK] Seq=3161 Ack=3723 Win=1047808 Len=0 Len=0 761 6.360152 mid tier IP(WS) Application .Net IP mid tier IP(WS) Application .Net IP TCP 60 https > 55137 [ACK] Seq=3723 Ack=3162 Win=2097920 Len=0 762 6.360256 mid tier IP(WS) Application .Net IP mid tier IP(WS) Application .Net IP TLSv1.2 139 Encrypted Alert Alert 763 6.360260 mid tier IP(WS) Application .Net IP mid tier IP(WS) Application .Net IP TCP 60 https > 55137 [FIN, ACK] Seq=3808 Ack=3162 Win=2097920 Len=0 Len=0 764 6.360300 Application .Net IP mid tier IP(WS) Application .Net IP mid tier IP(WS) TCP 54 55137 > https [RST, ACK] Seq=3162 Ack=3808 Win=0 Len=0 Len=0 765 6.360335 Application .Net IP mid tier IP(WS) Application .Net IP mid tier IP(WS) TCP 54 55137 > https [RST] Seq=3162 Win=0 Len=0

Len=0