masquerading & ftp
As a learning exercise, I'm replacing our FreeBSD firewall with a Debian one.
The machine is used to provide masquerading for several Windows, Linux and
FreeBSD boxes on our cable modem.
With Debian, FTP doesn't work from behind a standard masquerading firewall.
I've observed the problem with ipfw and ipchains both.
What is different about the default handling of FTP, ICQ and similar clients,
and what should I read up on to change this behavior? Under FreeBSD, these
worked without any special handling.
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