Re: PF binat and active FTP
From: Marin (REMOVE-marin-REMOVE_at_jware.hr)
Date: 02/24/04
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Date: Tue, 24 Feb 2004 23:36:00 +0100
Peter Matulis wrote:
>>[FTP SERVER]------[OPENBSD]--------[LINUX NAT]--------[Win98]
>>
>> ^ ^
>> | |
>>External NET Internal NET
>
>
> There must be something you're not telling us. Your setup is too strange.
>
Well, I know it's little bit strange, but: I am working for s small ISP
and OpenBSD is (will be, now it's Novell Border manager)
firewall/router/bandwidth shaper to all our customers who are on
wireless WAN, and Linux NAT is private firewall/NAT box of one of our
clients.
External NET is Internet, network between OpenBSD and Linux NAT is
Wireless WAN/LAN (my private network) and network between LINUX NAT and
Win98 is customers private network.
>
>>On Linux I have loaded module ip_masq_ftp.
>
>
> What does this module really do?
>
It enables active ftp over NAT (I think it's something like kernel
ftp-proxy on linux)
>>
>>active ftp from Win98 to FTP SERVER is broken (login is OK, but any form
>>of data transfer results in closed connection error)
>
>
> Are you sure that this is an active client?
yes (TCPDUMP), I am not sure about Windows version, but I know its
WiNTENDO (Win95 or Win98 or Win98 SE or WinME), and I can't do anything
about it (third party software vendor is requesting active ftp).
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