Date: Mon, 3 Sep 2012 12:03:54 +0200 From: Polytropon <freebsd@edvax.de> To: Victor Sudakov <vas@mpeks.tomsk.su> Cc: freebsd-questions@freebsd.org Subject: Re: Sharing COM ports to Windows hosts Message-ID: <20120903120354.293061a0.freebsd@edvax.de> In-Reply-To: <20120903030217.GA79339@admin.sibptus.tomsk.ru> References: <20120903030217.GA79339@admin.sibptus.tomsk.ru>
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On Mon, 3 Sep 2012 10:02:17 +0700, Victor Sudakov wrote: > Colleagues, > > There is a FreeBSD box with several RS232 ports. Can those ports be > accessed by Windows hosts over the network? Actually, does anyone > have a success story for such a scenario? > > There is some software like comms/serialoverip, comms/tits etc but are > there any (freeware) Windows virtual COM port drivers compatible > therewith? > > Maybe some Windows drivers for hardware console servers (like Moxa) > would work with tits etc? It is _easily_ possible, even though my own experiences do not include doing this with "Windows", but with other BSD boxes and even DOS. First you have to enable a serial terminal connection just the same way you handle the virtual terminals in text mode: Edit /etc/ttys and enable the line ttyu0 "/usr/libexec/getty std.19200" dialup on secure Now you can connect to that port via a serial cable, using a terminal emulator (for example Kermit). Make sure you have set the proper speed, 19k2 in this example (faster than the default 9k6). See "man 5 ttys" for examples. If you use a UNIX or Linux client, you can use the "cu" program. See "man cu" for details. However, what you need on "Windows" side is a program that can communicate via serial port. I don't know if such a program is still included in today's "modern" versions of "Windows", but I seem to remember that the 3.11 and 95 versions came with such a program. In worst case, maybe you can use a DOS program like Kermit under "Windows"? I'm sure the compatibility is restricted, but maybe you can give it a try. http://www.columbia.edu/kermit/mskermit.html Note that I haven't tried this with any recent FreeBSD system. But it _was_ possible with FreeBSD 4 and 5. -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...
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