Using TLS causes Directory Listing Timeout (it used to work fine)

[dbareis]

In the last few months (using newest versions at the time) I have had to change from "Use explicit FTP over TLS if available" to "Only use plain FTP (insecure)" or it will timeout (30 seconds) on listing the remote directory.

FileZilla Client

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Version: 3.45.1

Build information:

Compiled for: x86_64-w64-mingw32
Compiled on: x86_64-pc-linux-gnu
Build date: 2019-09-25
Compiled with: x86_64-w64-mingw32-gcc (GCC) 8.3-win32 20190406
Compiler flags: -g -O2 -Wall

Linked against:

wxWidgets: 3.0.5
SQLite: 3.29.0
GnuTLS: 3.6.9

Operating system:

Name: Windows 10 (build 18362), 64-bit edition
Version: 10.0
Platform: 64-bit system
CPU features: sse sse2 sse3 ssse3 sse4.1 sse4.2 avx avx2 aes pclmulqdq rdrnd bmi2 bmi2 lm
Settings dir: C:\Users\\AppData\Roaming\FileZilla\

[dbareis]

detailed log of the connection and timeout

[Tim Kosse]

A faulty firewall or NAT router is blocking the connection, most likely server-side.

You can use ​https://ftptest.net/ to figure out whether it's a server-side or client-side networking component.