Bug 24542 - Passive ftp doesn't use port 20
Summary: Passive ftp doesn't use port 20
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: ftp   
(Show other bugs)
Version: 7.0
Hardware: i386
OS: Linux
Target Milestone: ---
Assignee: Bernhard Rosenkraenzer
QA Contact: David Lawrence
Depends On:
TreeView+ depends on / blocked
Reported: 2001-01-22 12:16 UTC by Olle Hedman
Modified: 2007-04-18 16:30 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2001-01-22 12:16:33 UTC
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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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).

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