Date: Tue, 12 Apr 2005 08:41:09 +0100 From: Robert Slade <bsd@bathnetworks.com> To: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: weird problem with ipfw and ftp Message-ID: <1113291668.24798.3.camel@lmail.bathnetworks.co.uk> In-Reply-To: <425B7342.2080307@gmail.com> References: <425B7342.2080307@gmail.com>
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On Tue, 2005-04-12 at 08:05, Clement Twine wrote: > hi freebsd users, > > i have a problem with users accessing my ftp service from the > internet. everything was working well until i changed from > Linux/shorewall to freebsd/ipfw as my firewall. > > my setup is briefly as follows: > > FTP_Server (10.0.0.1) --- Firewall (IPFW) ----- INTERNET > > The linux rules were just two (and were working): > > allow tcp from any to 10.0.0.1 21 > allow tcp from 10.0.0.1 21 to any > > I have the following in ipfw but they have refused to work! > > ipfw add 00010 allow tcp from any to 10.0.0.1 21 > ipfw add 00011 allow tcp from 10.0.0.1 21 to any > > > The problem is that an ftp session is established, but when the > session enters passive mode, the ftp session hangs. Are there any > other ports that need to be opened? Has anyone had such a problem > before? I can see in the logs that unprivileged ports are > responding from the ftp server to the requestor - but have tried > all combinations of rules to no avail! > > Please help! > > Regards, > > Clem. You need to use port 20 too. Additionally, passive ftp uses high number ports to actually transfer the data. I am not sure how to do this with IPFW but there are are a number of tutorials about this try google. Rob > >
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