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09.24.2008 at 08:16AM PDT, ID: 23758988
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8.8

FTPS + IPTABLES

Asked by garethcummings in Network Software Firewalls, Linux Network Security, FTP Servers

Tags:

Hi,

Have FTPs setup succesfully on a box, won't work with iptables (FTP and SFTP working fine).  It makes the initial connection fine but when it goes to passive node and issues an LS command it hangs up and dies.

From googling I see this happens because the packets are encyrpted so the firewall can't inspect the packets hence it disallows the connection.  It seems the ftp-data can be transferred on any random high port so  I added the following rules to my iptables script thinking it would resolve the issue but the problem persists:

iptables -A INPUT -p tcp --dport 20 --sport 1024:65535 -j ACCEPT
iptables -A INPUT -p tcp --dport 21 --sport 1024:65535 -j ACCEPT
iptables -A OUTPUT -p tcp --dport 1024:65535 --sport 20 -j ACCEPT
iptables -A OUTPUT -p tcp --dport 1024:65535 --sport 21 -j ACCEPT

Anyone have any ideas on how to resolve the issue?

Cheers
Gareth
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[+][-]09.24.2008 at 08:36AM PDT, ID: 22560806

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[+][-]09.25.2008 at 11:15PM PDT, ID: 22576971

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[+][-]09.26.2008 at 06:20AM PDT, ID: 22579160

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About this solution

Zones: Network Software Firewalls, Linux Network Security, FTP Servers
Tags: Iptables
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Solution Provided By: Blaz
Participating Experts: 2
Solution Grade: A
 
 
[+][-]09.26.2008 at 08:23AM PDT, ID: 22580468

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[+][-]09.26.2008 at 08:28AM PDT, ID: 22580541

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[+][-]09.27.2008 at 11:23PM PDT, ID: 22590075

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[+][-]09.30.2008 at 09:22AM PDT, ID: 22606913

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[+][-]10.03.2008 at 04:03AM PDT, ID: 22632624

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