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This issue has been migrated to GitHub: https://github.com/python/cpython/issues/71673

classification

Title:	FTPlib hangs on some pasv responses
Type:	enhancement	Stage:	test needed
Components:	Library (Lib)	Versions:	Python 3.6

process

Status:	open	Resolution:
Dependencies:		Superseder:
Assigned To:		Nosy List:	Byoungwoo Song, giampaolo.rodola
Priority:	normal	Keywords:

Created on 2016-07-11 18:41 by Byoungwoo Song, last changed 2022-04-11 14:58 by admin.

FTPlib hangs on PASV responses when the connected server is within its local network.
Here's my fix that checks the target address with ipaddress lib:
https://github.com/python/cpython/pull/28/files