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IPFilter Infriging on Bay Network Patent?
jorhan writes "Darren Reed,
the author of IPFilter,
recently posted this message to the IPFilter mailing list. Apparently IPFilter may infringe upon USA patents owned by Bay Networks, specifically, #5790554. The patent might seem to own just about every conceivable way one might wish to filter and forward data packets, but trying to read through all of the "wherein said first condition" started to give me a headache (ObIANAL). But when you read what application the authors specifically had in mind, it really has little to do with network layer firewalling. Even more important is the question Darren's mail indirectly poses, "Anyone know of any prior art?""
"Conclusion: Yet another example of the shortcomings of the United States patent system. Sure, it's better than anything else in the world--but that doesn't mean it's perfect. Far from it, infact."
Hmmmm, I'm curious - it's the "best" patent system in the world, but here we have "yet another example" of its failings.
How much do your actually know about the patent systems of every other country in the world?
Reading the patent, both the abstract and the claims say many things to indicate that this patent covers network devices "such as a switch". Much of the patent is faily specific to forwarding between ports on such a device. I really don't think it can be said to generically cover generic layer-3+ packet filtering (in fact, I think it's pretty specifically layer-2ish).
Now, I'm not a lawyer, but I am a network engineer who deals with packet filtering all the time, and any "expert witness" worth his salt would bring these points up in a patent-suit. Someone should step up to be first on this one (Checkpoint or Cisco would be good choices, but there are many others who would be hurt by having to license this stuff).
On a more general point, I'm sure there are patents out there on just about everything that a modern Linux, BSD, etc system does. Some are already expired, but many are not. We really need to get a game plan here. My personal take is that patents are still a good thing, even on software, but it's the duration and disclosure that kill us. How can we reasonably get patent duration for software down to 2 years and require early disclosure of a pending patent? If those two things happened, patents would actually be a good thing for Open Source!
Patents aren't evil by nature. PKWare owns patents that cover the way the inflate/deflate alogrithms work. PKWare also put them in the public domain. Or the RTLinux patent. He wasn't served with papers or told to stop doing what he is doing. IPFilter isn't exactly an unknown piece of code either. I'd assume it's not a problem. Companies don't want to test patents like those becuase they lose all the marbles when they don't win in court.
Or, better yet, it would be nice if there were some lawyer out there who would just donate a few hours his time and settle it for us. It's funny how the reputation of lawyers has fallen so low that it doesn't even cross our mind to ask them to do something charitable anymore (the extremely small minority of social justice lawyers excepted -- Ann Beeson, I love you.) Whether this is justified, I don't know. But there's no profession I frown on more, and goodness knows I won't be going to law school anytime soon.
:)
And I'm a newspaper reporter
I think there is a world market for maybe five personal web logs.
Linux is not a UNIX. Get used to it.
/proc filesystem, and I print from my WinNT box at work using enscript and lpr because the Solaris machines at work don't have enscript and I don't have root.
UNIX, much like pornography, has gone to a "I know it when I see it" thing.
From the strictest view, one might consider the only UNIX OpenUNIX from Caldera. This is where the UNIX brand name has finally ended up (ATT -> Novell (strangely enough) -> SCO -> caldera). It may die there, caldera's in bad shape. OpenUNIX is changing, becoming very Linux friendly.
Almost all UNIXes (Unices?) have a Linux compatibility layer in the kernel. So Linux is becoming the one all encompassing API, if not the one true UNIX.
UNIX came out of AT & T, back when UNIX was still a research project and they were friendly with educational institutions. BSD was a fork. SVR4 UNIX, the most common "base" variant was basically SVR3 with BSD stuff. FreeBSD/NetBSD takes on the spirit of that work. Is FreeBSD UNIX?
Darwin, The base of MacOS is a Mach Microkernel with FreeBSD/NetBSD. It will be the most distributed "UNIX" ever. Is MacOS UNIX? it's very NeXT based, which was a bastard offshoot.
Linux works like UNIX, has the same design philosophy. Is the only UNIX some folks will ever touch. You have weird hybrids of SVR4/BSDlike systems depending on where Linus and the Distro guys picked and choosed stuff.
I have Cygwin on my Win2000 box. I use a bash shell, have rlogin, gcc tools. Is Win200 Linux? I even have a
Hmm, is POSIX compliance mean UNIX? POSIX was supposed to be the one true UNIX standard. If so than the most POSIX OS is WinNT. MS had a POSIX subsystem, never really worked but was needed to satisfy government regs on OS purchasing. MS WinNT was the only OS ever to get POSIX certified, so it's the one true UNIX, from a point of view.
Don't call folks stupid on things that are just interpretation. I can say OpenUNIX, the *BSD's, or WinNT the only UNIX, depending on what my criterea are. Sayig your interpretation is the only one is just trolling for a flamewar.