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redbeard007's avatar
redbeard007
Aspirant
May 14, 2024
Solved

Microsoft Authenticator times out

Hi all. I have a new fibre connection with an Orbi RBR350 - Router Firmware Version: V4.20.0.4_3.100.71   I use the Microsoft Authenticator app on my Android devices for MFA. When on WiFi throu...
  • redbeard007's avatar
    redbeard007
    Jun 05, 2024

    Ugh - I have discovered that my ISP has a "Port Filtering" setting that is enabled by default.

    "We network block inbound traffic (TCP/UDP) associated with the following ports."

    Port

    Inbound traffic

    0

     

    20

    FTP data

    21

    FTP data

    22

    SSH (Secure Shell), File transfers

    23

    Telnet

    25

    SMTP (email sending)

    53

    DNS server

    67

    Bootstrap server, DHCP

    68

    Bootstrap client, DHCP

    80

    HTTP server

    110

    POP3 server

    135

    remote manage DHCP, DNS server

    137

    NetBIOS name service

    138

    NetBIOS Datagram

    139

    NetBIOS Session

    143

    IMAP server

    161

    SNMP

    162

    SNMP

    443

    HTTPS server

    547

    DHCPv6 server

    593

    HTTP RPC remote procedure

    2049

    NFS

     

    With this disabled - I can finally use my authenticator app.

     

    Grrrr so frustrating as the ISP never mentioned this!!