HRBlock 2025 Tax Software Cannot Connect to its Update Center

H&R Block 2025 fails to perform initial check on scheduled update and download Federal/State Software Download, resulting in a persistent "Cannot Connect to Server" or Error Code: WDDO.

 

Isolation Test: A separate Windows 10 laptop worked perfectly on a standard ISP network (friend's house) but failed with the same WDDO error once brought behind the Firewalla Purple.

 

Firewalla Failure: Even with Emergency Access ON, Monitoring OFF, and Adblock/Family/DoH Disabled, the connection still failed.

 

I am not a network engineer. So, I asked Google Gemini AI to search for answer and below is what it suggests:

Google Gemini suggests the block is happening at the Firewall/Ingress level or due to Packet Inspection that persists despite those toggles. 

 

The "WDDO" Behavior: This specific error appears to be a "Handshake Timeout." It occurs when the software sends an outbound request, but the "return" response from H&R Block’s server is dropped or delayed beyond the software's strict timeout window.

 

IPv6 Hypothesis: There is a suspicion that H&R Block's servers attempt an IPv6 handshake that the Firewalla's default IPv6 rules might be blocking as an unsolicited inbound connection.

I hope someone can help me.

 

Thank you.