Date: Wed, 10 Nov 1999 11:08:33 -0500 From: Graeme Tait <graeme@echidna.com> To: Marty Cawthon <mrc@chipchat.com> Cc: jimbean109@hotmail.com, freebsd-questions@freebsd.org Subject: Re: can I use natd or is this even possible? Message-ID: <38299881.20DC3443@echidna.com> References: <19991110014119.63178.qmail@hotmail.com> <19991110155125K.mrc@ChipChat.com>
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You only have one IP address visible from the Internet - therefore whatever domain names you define for Internet use must map to this IP. Having more names isn't going to help. However, I believe you could set up the gateway machine to map (say) port 2121 to port 21 on the Win95 machine. Most FTP clients can connect to other than the default port 21, so then you could enable the FTP daemon on the Win95 box to be accessed from the Internet. Marty Cawthon wrote: > > From: "Jim Bean" <jimbean109@hotmail.com> > jimbean109> I have a single (external) IP address with a FreeBSD box answering to > jimbean109> (www.domain.com, ftp.domain.com, ma.domain.com) with an internal address of > jimbean109> 10.1.1.1, I also have a WIN95 machine with an internal address of 10.1.1.2 > jimbean109> which I'd like to run a GUI FTP deamon from (with a name such as > jimbean109> (ftp2.domain.com). This would be seperate from the FreeBSD machine which > jimbean109> would still take FTP requests at ftp.domain.com. Basiclly I'm running to > jimbean109> machines with internal addresses and one external address and would like > jimbean109> both the take seperate requests from the outside. I've looked at natd but > jimbean109> that appears to be for redirecting ports only? Is this possible to do? How > jimbean109> would I go about it? > jimbean109> > jimbean109> 10.1.1.1 (& external address) FreeBSD ftp.domain.com > jimbean109> 10.1.1.2 WIN95 ftp2.domain.com > > Short answer: > not possible > > Discussion: > It seems that you want to access a server daemon on your Win95 machine from > the Internet at large. But you cannot do this because you have a 10. address > assigned to it. > > If I try to send a packet from my machine to your Win95 machine (10.1.1.2) > this packet will not even make it past my router because 10. addresses > are not routed on the Internet. The packet will be dropped. > > If I send a packet from my machine to your external address on your FreeBSD machine, > how can I specify that this packet is really destined for an internal machine with > a 10. address? The answer is: it cannot be done with any software that I know of. > > With NATD your 10. address on your Win95 machine will be translated by NATD to > the external address of your FreeBSD machine (or a pool of legal addresses, depending > upon configuration). NATD then keeps track of which connections/packets are coming > and going for FreeBSD and which are coming/going for the 10. (Win95) machine. > > Summary: You cannot access the FTP daemon on your Win95 machine from outside your > private 10. network. With NATD you can use an FTP client on your Win95 machine to > access an FTP server outside your private 10. network. > > References: RFC 1918 "Address Allocation for Private Internets" > > Marty Cawthon > ChipChat > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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