Bug 24542

Summary:	Passive ftp doesn't use port 20
Product:	[Retired] Red Hat Linux	Reporter:	Olle Hedman <olle.hedman>
Component:	ftp	Assignee:	Bernhard Rosenkraenzer <bero>
Status:	CLOSED NOTABUG	QA Contact:	David Lawrence <dkl>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	7.0
Target Milestone:	---
Target Release:	---
Hardware:	i386
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2001-01-22 12:16:33 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Olle Hedman 2001-01-22 12:16:30 UTC

I run into trouble when using ftp from a redhat 7.0 server (uname -r 
2.2.16-22) to another linux machine (uname -r 2.2.12-20). After login I 
try a "ls", thus using passive ftp, and find that the redhat 7.0 machine 
is using an arbitray high port instead of port 20. This will cause 
problems with firewalls. 

The behavior is as follows:
ftp> ls
227 Entering Passive Mode (IP for the "other linux machine",port)
where it should be:
ftp> ls
227 Entering Passive Mode (IP for the "redhat 7.0 server",port)

Comment 1 Bernhard Rosenkraenzer 2001-01-22 12:56:02 UTC

This is not a bug, but an RFC compliant security fix.
You need to update either the ftp server or the firewall (probably the latter).