Hi,
I'm encoutering a strange issue for several days and not being able to understand. It's a connection problem with Microsoft.com account of with ftp servers. The problem becomes strange as it happens only with 2 dell computers and one ISP (k-net). Otherwise, no problem with dell pc and another isp (Free) or other pc and K-net. Furthermore, it does not work with some softwares (Edge, Chrome, Firefox) but works with Avast Secure Browser. Same with ftp, does not works with Filezilla, but works with winscp. Pc use windows 10 20H2 or previous. When tryng to connect to microsoft.com/account => login.live.com I get an err_connection_reset, you re not connected to the internet. Wireshark shows multiple Up Ack retransmission. I would be more than happy to send wireshark capture but It appears tha tI'm not allowed to send them on this site "as it requires 60 points". So I paste some results below. Thanks for any help,Olivier
108 6.516763 46.105.162.69 192.168.1.111 FTP 109 [TCP Spurious Retransmission] Response: 220 ProFTPD Server (Fatty FTP Server) [46.105.162.69] 109 6.517127 192.168.1.111 46.105.162.69 TCP 66 [TCP Dup ACK 106#1] 55452 → 21 [ACK] Seq=11 Ack=56 Win=263424 Len=0 SLE=1 SRE=56 110 6.526926 192.168.1.111 46.105.162.69 TCP 64 [TCP Retransmission] 55452 → 21 [PSH, ACK] Seq=1 Ack=56 Win=263424 Len=10 112 6.737237 46.105.162.69 192.168.1.111 FTP 109 [TCP Spurious Retransmission] Response: 220 ProFTPD Server (Fatty FTP Server) [46.105.162.69] 113 6.737536 192.168.1.111 46.105.162.69 TCP 66 [TCP Dup ACK 106#2] 55452 → 21 [ACK] Seq=11 Ack=56 Win=263424 Len=0 SLE=1 SRE=56 114 6.842390 192.168.1.111 46.105.162.69 TCP 64 [TCP Retransmission] 55452 → 21 [PSH, ACK] Seq=1 Ack=56 Win=263424 Len=10 115 7.180452 46.105.162.69 192.168.1.111 FTP 109 [TCP Spurious Retransmission] Response: 220 ProFTPD Server (Fatty FTP Server) [46.105.162.69] 116 7.180639 192.168.1.111 46.105.162.69 TCP 66 [TCP Dup ACK 106#3] 55452 → 21 [ACK] Seq=11 Ack=56 Win=263424 Len=0 SLE=1 SRE=56 117 7.448027 192.168.1.111 46.105.162.69 TCP 64 [TCP Retransmission] 55452 → 21 [PSH, ACK] Seq=1 Ack=56 Win=263424 Len=10 126 8.065216 46.105.162.69 192.168.1.111 FTP 109 [TCP Spurious Retransmission] Response: 220 ProFTPD Server (Fatty FTP Server) [46.105.162.69] 127 8.065594 192.168.1.111 46.105.162.69 TCP 66 [TCP Dup ACK 106#4] 55452 → 21 [ACK] Seq=11 Ack=56 Win=263424 Len=0 SLE=1 SRE=56 128 8.654903 192.168.1.111 46.105.162.69 TCP 64 [TCP Retransmission] 55452 → 21 [PSH, ACK] Seq=1 Ack=56 Win=263424 Len=10 136 9.837911 46.105.162.69 192.168.1.111 FTP 109 [TCP Spurious Retransmission] Response: 220 ProFTPD Server (Fatty FTP Server) [46.105.162.69] 137 9.838304 192.168.1.111 46.105.162.69 TCP 66 [TCP Dup ACK 106#5] 55452 → 21 [ACK] Seq=11 Ack=56 Win=263424 Len=0 SLE=1 SRE=56 154 11.061146 192.168.1.111 46.105.162.69 TCP 64 [TCP Retransmission] 55452 → 21 [PSH, ACK] Seq=1 Ack=56 Win=263424 Len=10 173 13.381778 46.105.162.69 192.168.1.111 FTP 109 [TCP Spurious Retransmission] Response: 220 ProFTPD Server (Fatty FTP Server) [46.105.162.69] 174 13.381927 192.168.1.111 46.105.162.69 TCP 66 [TCP Dup ACK 106#6] 55452 → 21 [ACK] Seq=11 Ack=56 Win=263424 Len=0 SLE=1 SRE=56 197 15.870419 192.168.1.111 46.105.162.69 TCP 64 [TCP Retransmission] 55452 → 21 [PSH, ACK] Seq=1 Ack=56 Win=263424 Len=10 221 20.477945 46.105.162.69 192.168.1.111 FTP 109 [TCP Spurious Retransmission] Response: 220 ProFTPD Server (Fatty FTP Server) [46.105.162.69] 222 20.478181 192.168.1.111 46.105.162.69 TCP 66 [TCP Dup ACK 106#7] 55452 → 21 [ACK] Seq=11 Ack=56 Win=263424 Len=0 SLE=1 SRE=56 260 25.478343 192.168.1.111 46.105.162.69 TCP 54 55452 → 21 [RST, ACK] Seq=11 Ack=56 Win=0 Len=0