![Test Port" incorrectly says "Port is closed" on system with both IPv4 and IPv6, caused by portcheck.transmissionbt.com · Issue #1190 · transmission/ transmission · GitHub Test Port" incorrectly says "Port is closed" on system with both IPv4 and IPv6, caused by portcheck.transmissionbt.com · Issue #1190 · transmission/ transmission · GitHub](https://user-images.githubusercontent.com/1273502/80307024-ea283780-87c6-11ea-815f-aeddfa40754a.png)
Test Port" incorrectly says "Port is closed" on system with both IPv4 and IPv6, caused by portcheck.transmissionbt.com · Issue #1190 · transmission/ transmission · GitHub
![Wireshark--Transmission Control Protocol, Src Port: 51589, Dst Port: 443, Seq: 599, Ack: 6627, Len: 0 - Stack Overflow Wireshark--Transmission Control Protocol, Src Port: 51589, Dst Port: 443, Seq: 599, Ack: 6627, Len: 0 - Stack Overflow](https://i.stack.imgur.com/Y8B5y.jpg)
Wireshark--Transmission Control Protocol, Src Port: 51589, Dst Port: 443, Seq: 599, Ack: 6627, Len: 0 - Stack Overflow
![networking - How to open port for transmission bittorent while using internet from USB tethering? - Ask Ubuntu networking - How to open port for transmission bittorent while using internet from USB tethering? - Ask Ubuntu](https://i.stack.imgur.com/xGQLr.png)