Yeah, but they say its cheaper on the premises. Which it won't be until standard business PC's include an optical ethernet connector as they do copper ethernet connectors now. The cost of installing the extra interface card PC's is just too high, 1000BaseSX cards still cost more than a complete office PC, which today include a 1000BaseT NIC as standard. Also ethernet switches with all fiber interfaces are magnitudes more expensive than copper stuff. Conclusion: fiber at the premises is only the way to go if you got loads of money you don't care about.
It is here. There was even a specialized union for it "De rode draad" (the red thread). Alas this has been terminated and they can now only join one of the big multidisciplinairy unions. Gotta love the Netherlands.
How improbable it is doesn't say sh*t since all outcomes are equally improbable. The only thing it sais is that if you'd take an other planet exactly like earth it will almost certainly not develop the human species. Or even mammals. What will develop (if something develops at all) is something just as improbable as we are.
There is an other advantage of WiFi. You don't have to deal with ports. If your 100BaseT switch is full you need to buy an extra switch even for that one extra PC. With wireless you don't have that problem. However since wireless is a shared medium you will see throughput degrade with every PC you add. And since the available spectrum is limited you can't keep adding AP's to reduce cell sizes. Althoug the Avaya AP's we use can reduce transmit power to minimize interference. But the rule here is if it doesn't move, wire it up. If it moves, use WiFi. And if it doesn't move and is small (AP's, phones, ethernet webcams for security) use PoE. Especially since AP's and webcams tend to be mounted near the ceiling where we do have cat5 but no power. An other great advantage of PoE is that you can turn off power from devices while at your desk. Want to upgrade the phones ? Just put the new firmware on the TFTP server and reset the power switch. Presto 24 phones upgraded. Is an AP unresponsive ? Just cycle the power to it from your desk (or even from home).
Having seen the effect of a radar sweep of a dutch frigate while in the harbour i think you can forget about shielding for this. (No, it is not allowed to use the ships main radar while in the harbour. But sometimes it is done by some asshole anyway). These thing are insanely powerfull. Crt's crumble, radio's yank, computers reset etc. Granted this was at about 500 meter from the ship but designing so thus has no effect will be costly. Most likely to costly for door openers
When switching to a full IP network I was about to delete IPX from the interface to the serverpark at the company I'm working for. With the command "no ipx interface" already in my head I decided to check the configuration of the inteface for reference. Instead of "show ip inteface" I ended up typing "no ip interface". The damn Prominet P550 didn't hesitate to do exactly what it was told. This had the effect of erasing the interface to the serverpark. About 1000 employees suddenly had an extended coffee break.
.. 'caldera' was the violator, and once SCO was purchased the mistake was realized after a 'long and extensive audit' and the product pulled in good faith...
Wrong, they would have had to pull their distro -before- suing IBM.
"This time, the vendor offers other operating systems, but Chugg is sticking with his original Linux system from UnitedLinux vendor The SCO Group--by choice."
So even when choosing linux CIO's still make the wrong choice.....
What I hope is that they make it "hackable". Not like the half baked Wyse "runs linux" terminal I got the calculates a checksum over the kernel to be loaded and refuses to execute anything else but the supplied kernel (2.0.35 ugh).
> There's nothing wrong with mixing free and closed software. If these drivers enable me to play the likes of UT 2003, then so much the better.
As wrong and right are subjective terms, I think this should be "I find nothing wrong with...". I know RMS strongly disagrees with you standpoint. So do I. I like free software and find it extremely irritating that some hardware vendor tells me that I should run Redhat if I want to use their product under linux. Since they're only providing RPM's
However chances you will get (part of) the reward get much bigger if you do share all your findings. ie also for partial solutions it "first published/first payed". So sitting on your source is quite a risk.
In away you could say that we're already past that point. Network congestion is a relatively common problem on the internet. Just try to dowload something sizeable at saturday evening. (Or is that just my ISP?)
> but i can sure as hell open(), read(), and write() to devices and ports just like any other file.
OK, but can you do everything you do to a device to any ordinary file ? In unix every file is created equal but some files are more equal than others. See ioctl(), 'nuff said.
>ICMP is generally a bad idea, as it is not necessary for core services to run, and can be used to sniff system settings out.. if you dont need it, why enable it?
Because its an essential part of the protocol. As said before ICMP unreachable is used for MTU discovery. If you block it all, things will break. Furthermore it can be very usefull to see if a host is up with ping. Like all things with system/network administration you must know what your doing. Filtering out suspicious/dangerous ICMP is good (you don't want your network to become a smurf amplifier for example). Blocking everything is bad.
What you are saying sounds to me like: "Power steering in cars is generaly a bad idea, it can break at the wrong time.. if you don't need it, why enable it ?
Slashdot Mirror
Yeah, but they say its cheaper on the premises. Which it won't be until standard business PC's include an optical ethernet connector as they do copper ethernet connectors now. The cost of installing the extra interface card PC's is just too high, 1000BaseSX cards still cost more than a complete office PC, which today include a 1000BaseT NIC as standard. Also ethernet switches with all fiber interfaces are magnitudes more expensive than copper stuff. Conclusion: fiber at the premises is only the way to go if you got loads of money you don't care about.
It is here. There was even a specialized union for it "De rode draad" (the red thread). Alas this has been terminated and they can now only join one of the big multidisciplinairy unions. Gotta love the Netherlands.
Ah, well they won't get thet much advertising out of it since the site is crawling already.
Yeah, they should list remote desktop as spyware to then ? And IIS, because people can get files of your webserver too.
Get real
How improbable it is doesn't say sh*t since all outcomes are equally improbable. The only thing it sais is that if you'd take an other planet exactly like earth it will almost certainly not develop the human species. Or even mammals. What will develop (if something develops at all) is something just as improbable as we are.
And one should add that PoE can use the signal pairs to provide power too. So GigE and PoE are perfectly compatible.
There is an other advantage of WiFi. You don't have to deal with ports. If your 100BaseT switch is full you need to buy an extra switch even for that one extra PC. With wireless you don't have that problem. However since wireless is a shared medium you will see throughput degrade with every PC you add. And since the available spectrum is limited you can't keep adding AP's to reduce cell sizes. Althoug the Avaya AP's we use can reduce transmit power to minimize interference.
But the rule here is if it doesn't move, wire it up. If it moves, use WiFi. And if it doesn't move and is small (AP's, phones, ethernet webcams for security) use PoE. Especially since AP's and webcams tend to be mounted near the ceiling where we do have cat5 but no power.
An other great advantage of PoE is that you can turn off power from devices while at your desk. Want to upgrade the phones ? Just put the new firmware on the TFTP server and reset the power switch. Presto 24 phones upgraded. Is an AP unresponsive ? Just cycle the power to it from your desk (or even from home).
Sorry, but the USA is not number one in education but numer 14, see http://www.nationmaster.com/graph-T/edu_sch_lif_ex p_tot
Having seen the effect of a radar sweep of a dutch frigate while in the harbour i think you can forget about shielding for this. (No, it is not allowed to use the ships main radar while in the harbour. But sometimes it is done by some asshole anyway). These thing are insanely powerfull. Crt's crumble, radio's yank, computers reset etc. Granted this was at about 500 meter from the ship but designing so thus has no effect will be costly. Most likely to costly for door openers
When switching to a full IP network I was about to delete IPX from the interface to the serverpark at the company I'm working for.
With the command "no ipx interface" already in my head I decided to check the configuration of the inteface for reference. Instead of "show ip inteface" I ended up typing "no ip interface". The damn Prominet P550 didn't hesitate to do exactly what it was told. This had the effect of erasing the interface to the serverpark. About 1000 employees suddenly had an extended coffee break.
Then look at the active sites graph. Thats sites with unique pages. And yes, apache scores 2/3 there too.
Make that FPU a 487SX. (which was actually a 486DX with an extra pin)
.. 'caldera' was the violator, and once SCO was purchased the mistake was realized after a 'long and extensive audit' and the product pulled in good faith...
Wrong, they would have had to pull their distro -before- suing IBM.
Funny, to quote the article:
"This time, the vendor offers other operating systems, but Chugg is sticking with his original Linux system from UnitedLinux vendor The SCO Group--by choice."
So even when choosing linux CIO's still make the wrong choice.....
What I hope is that they make it "hackable". Not like the half baked Wyse "runs linux" terminal I got the calculates a checksum over the kernel to be loaded and refuses to execute anything else but the supplied kernel (2.0.35 ugh).
Neh,
I think he meant lawyers with Role Playing Games. Man they will bore you to death before you can say "What the...".
> There's nothing wrong with mixing free and closed software. If these drivers enable me to play the likes of UT 2003, then so much the better.
As wrong and right are subjective terms, I think this should be "I find nothing wrong with...". I know RMS strongly disagrees with you standpoint. So do I. I like free software and find it extremely irritating that some hardware vendor tells me that I should run Redhat if I want to use their product under linux. Since they're only providing RPM's
However chances you will get (part of) the reward get much bigger if you do share all your findings. ie also for partial solutions it "first published/first payed". So sitting on your source is quite a risk.
I bet that came as a supplies tou you, not ?
>Isn't the MAC address also in an IP header?
No, it's in the ethernet header. And only if
the source is on the same segment as the target.
>Is that spoofable?
Yes.
Nope, not true. If they aquired support
by using kernel modules their home free.
Like with the netbox.
In away you could say that we're already past
that point. Network congestion is a relatively
common problem on the internet. Just try to
dowload something sizeable at saturday evening.
(Or is that just my ISP?)
> but i can sure as hell open(), read(), and write() to devices and ports just like any other file.
OK, but can you do everything you do to a device to any ordinary file ? In unix every file is created equal but some files are more equal than others. See ioctl(), 'nuff said.
Well, if were going to exchange pictures of supercomputer then there is a nice one of the O2000 at SARA here in the netherlands.
>ICMP is generally a bad idea, as it is not necessary for core services to run, and can be used to sniff system settings out .. if you dont need it, why enable it?
Because its an essential part of the protocol. As said before ICMP unreachable is used for MTU discovery. If you block it all, things will break. Furthermore it can be very usefull to see if a host is up with ping. Like all things with system/network administration you must know what your doing. Filtering out suspicious/dangerous ICMP is good (you don't want your network to become a smurf amplifier for example). Blocking everything is bad.
What you are saying sounds to me like: "Power steering in cars is generaly a bad idea, it can break at the wrong time.. if you don't need it, why enable it ?
Because it's fscking usefull