Nope HP ships the part you replace and then you ship back the defective part and they ship you a 32 meg usb flash drive for your trouble and returning the bad ram.
It allows you to realy use SAN's it's a filesystem that allows multiple readers and writers on one real disk. No other standard linux FS does this but there are add on ones that have similar functionality and work better or worse on different hardware/OS's. Realy what it means is you can have say 10 servers all serving up the same content by all looking at the same set of disks. This is extreamly usefull in tightly packed clusters that need to share large data sets (things that just dont fit all into ram) or HA/HP clusters to serve up ritch media like streaming video (Most web data is to trivial to replicate to make this worth it there but when your talking about TB's of streaming content it's non trivial to use a lot of redundant disk/replicate)
It's a free email account for starters. Realy do people realy expect them to investigate??? I work with ISP's the the procedure at all of them has been shut down instantly anybody thats accused of spamming and let them complain and then look at the account there are so few false positives this makes sence from an efficiency standpoint. I more wonder if they bothered to send an email to the account stating this and how to fix it, it would also be nice if incomming mail still works. The fact is if you dont react instantly then your going to get on the RBL's and loose ALL your customers in the long run.
SBC is CT is pretty bad for corperate and home customers. Tech support is in Flordia and dosent have a clue whats going on and they have a ho hum additude about fixing even corperate leased lines. I'm a network guy that had been working in the CT area for 15 years or so. SNET was the same before them.
Personaly I changed over to cable and while there were piles of issues to start (leaving rg59 access cable in did not help) but since then it's been rock solid. This is compared to DSl with an outage generaly state wide once every few months.
Well the point being is that the SMTP server should only accept authenticated single hop mail on that port that from it's domain and it can verify the username/password. Realy it's ment to get around all the hacks to close open relays that broke laptops and other mobile users.
I guess read the piled one RFC quotes:) But yea like I said 587 is the RFC standard port for a MUA to talk to a SMTP server. SMTP servers talk to other SMTP servers via port 25 to perserve backwards compatability.
Why dont you get with the rest of the planet and use 587 for client mailers to connect to your server and run authentication??? It's a port that shouldent be blocked by anybody but a corperate system and if they are blocking it you shouldnt be trying to get around it:)
OK this is pretty OT as well but I'll have to agree to many people have no depth. But in reviewing a canidate it's generaly better to try and figure out how quickly they can get some depth. And knowing a little bit of everything and being able to go deaper quickly can make you a great CTO:) or consultant (IE not a temp staffer being called a consultant)
Yea you can become Bob's PC you can also become that random wallflower of a PC or some printer. This realy is what 802.11x is for so people authenticate to a server and get on the right vlan. Add to that Dynamic ports shouldent talk to other dynamic ports and lock any static ports like printers into there own little vlan that cant get out (Yes you can my them dynamic by MAC but they shouldent be roaming a static mac security pollicy add a little I guess) Add some switch level security so that workstations only get to talk to routers with the servers on a different vlan. MAC addresses are just to easy to clone.
our correct in your statement but your neglecting that most industrial hydrogen is made from and with fossil fuels. Granted you need to get the demand there then you can work on that but it's not realy a clean solution today it's just moving the polution to the factory/plant away from the car.
OK lets say your PC is drawing on average 300 watts not to hard to do with a modern machine. At 15 cents a kwh over a month thats slightly more than 32 bucks, my laptop maxes out at 60 watts and thats charging the battery it's normaly about 30 or a thenth of that figure but even at may I would be saving 26 bucks a month. I live in the north east so the cost is a lot higher than average here the best I could find was 2001 data that put it at 8 cents national residential average.
First off your off on your raid levels raid 3 is single drive parrity raid 4 is synced spindles single drive parity (better but requires drive support). Raid 5 is only slower than raid 0 if yoru running proper gear, granted I spend a lot of time on high end external raid controlers those low end scsi to pci garbage seem to have issues due to under powered controlers. But that being said I didn't clearly read the post he wanted it for a home server assuming cheap mirror sets of IDE disks with some striping mixed in if he needs speed.
As for pci to SCSI raid cards how many channels are you looking for I would assume you would want 3. I have used some LSI cards they work under linux pretty well the performance is better than most of the pci cards I have seen but still not great. If you do anything increase the cache size on it to max it makes a big difference in scatter gather operations that databases can be good for. Still if you need IO's per second go with and external controller you wont have any issues with linux as it looks like a single disk and you see it via a normal SCSI or FC card.
I think there is a level of trust issue. It's one thing to use plain text on UUNet's backbone it's alother to use it on some guys wifi that he is letting the world use. Your shouldent trust either of them but I would trust UUNet or another backbone to not care about my email password a lot more than joe geek with a free wifi AP. Granted I run everything though SSH, IPSec and SSL either way. And BTW they can see whats inside your encryted connection it will just take awhile encryption does not make anything perfectly secure just secure long enough where it hopefully dosent matter. I may be biased in this I work for large slace networks and can attest that in general we dotn care abotu your logins it's not even fun to look, a 14 year old sharing out his cable modem might be a lot more interested.
If your running a fileserver with a decent ammount of writes yours going to want RAID5 as it has the least penalty. Hot swap drives are easy enough with SCSI or FC a bit more complicated with SATA and rather complicated with IDE but can be done. For a simple setup as little as 3 disks will do and you will get 2 disks worth of space performance setups will have more spindles. You didn't state as to what sort of load your expecting and that makes a huge difference. For the ultra cheap I have picked up IDE raid 5 cards supprting 4 drives with hot swap for sub 30 bucks on ebay they will only work with 120 gig drives max and are limited to ultra 66 but thats a third of a TB usable as well for a few hundred bucks and it's performance is good enough for a 100bt file server.
Using somebody elses network is similarly insecure. Setup airsnort and see how much traffic is plain text out there on a public wifi you will see piles of pop3 logins because all to often they are allowed.
Re:Is it just me...
on
Linux Unwired
·
· Score: 2, Insightful
It's a bit over hyped for big desktop replacement laptops (I own 3 of them) where they need to be pluged into power anyway. But for a PDA bluetooth or 802.11(abg) is rather usefull as they can get out get your mail sync etc, same goes for small light weight laptops that have decent battery life. As far as cell phones it's all about how you use it, I have a cell phone that nobody calls me on unless it's important as in router down (I'm a network guy) as in I take one or two phone calls a business day on it. It's about lifestyle as well, I take an hour plus ride on the train each way a cellphone with bluetooth, laptop and pda allows me to get on the internet to read my personal email web surfing etc without looking like a moron with piles of wires hanging around. At work wifi is nice for laptops that you might be taking around working on the network, and the usual PDA functions. I wouldent call it expensive tech either 802.11b devices run about 20 bucks less than a stack of DVD-R's or a decent sized USB key.
Yes DSL can be run naked down the copper pair. And just go with vonage for the phone provider. I just made the full out switch when I moved I dumped DSL and picked up cable with no issues except SBC sitting on the number transfer.
Dish Network's customer services is horid and they like to charge and hold onto funds forever. There compression quality is pretty bad as well as compared to Directv. In my own case I got the equipment and service from directv got the install signal strength in the 90's good line of sight etc all with a 30 day no penalties right of return. Well there compression is horid it's as bad as my local cables digital offerings or directv's local channels. So I called up to retunr it. That took nearly two hours mid afternoon on a weekday between operators that insisted I had a year contract etc etc etc, a manager finialy honored there contract and accepted the cancelation and told me to call the installer to pick up the gear. Funny the installed didn't want to and took 3 weeks to do so even leaving me the dish on the roof. 3 months later a funny charge showed up on the plastic I used to setup the account for like 400 ish from them. I called and it tooks hours and hours with them insisting that I broke contract. I had to fax them the recipt for the returned equipment and my contract with the 30 day return 3 seperate times. They then claimed that I didn't realy cancle till the equipment was picked up not when I called them so was over the 30 days and still owed them. A round with my credit card company and the BBB finialy got it resolved and a credit nearly 4 months after they charged it.
I have had Directv for six years now and have never had those issues. One bad tivo in shipping but nothing like this experience. I'm comparing service on a wide screen CRT and DLP rear screen and dish has much more noticable compression artifacts to my eye. Directv I beleive has the ability to alocate varing ammounts of bandwith on a per channel basis where dish is fixed meaning that cnn dosent look as good as HBO but who cares about CNN but your HBO HD should look great.
Again this is just the comments of one person with a bad experience with dish.
You sound a lot like me ten years ago though probably with a shorter attention span. Anyway here goes.
School well just get through it mentors are a good thing find a teacher with lots of short projects things that are hard to do but with short deadlines. To much in acidemia are these long term projects that get bogged down granted this is how some reasearch works and how many in corprate america do there day to day stuff.
Work it's all about saying yes. Allwasy say yes to any project get it started and have it's own life. You can make a lot more money as the idea person than the tighen the bolts write the piles of code person. Write the core prototype code the functional type but dont let yourself get bogged down in writting error checking rutines or pretty gui interfaces. You need to impress people that you can get the idea end of it through prototype and that it's more valuable to have you work the next idea than play with pretty gui's or bells and wistles for the marketing people. Consulting is a good section to be in as you move around a lot and are to expensive to give the drudgery to.
I'm not an audio purist but it would see reasonable to ask for basic specs like S/N to comapire pirce vs performance. Granted if I use of one of these it would be via the optical out and move the DA stage to something that I trust. This box might make the wife factor in place of the existing pile of PC gear in the basement that uses some long runs of optical and coax cable though the walls (existing setup)
For something slightly OT I would have to agree people will listen to noise I guess all the pop junk deadens there ears to noise. I can listen to eminem but it should still sould as good as the source. I realy ont see what cost there is to listing a S/N they list every other spec anyway it's just something anything should have. It's not like asking for freq responce curves or something exotic.
Am I the only one that is missing audio specs from this? Simple things like signal to noise on the analog audio out would be nice same for things like how many channels I'm assuming a sterio pair but can it do 5.1 6.1 or 7.1 on the optical out? It seems ot only be able to repeat the wifi but claims bridging might this be the nearly perfect tv room accessory? I could see a sterio connection with a wired ethernet bridge for the console/tivo and a wifi repeater for better signal strength.
I cut my teeth on apple back whe a Mac 128 was current. They seemed to have been moving father and farther from being tied to any specs in the last 10 years.
There are a lot of types of clusters. You could put those 8 boxes together in a shared something cluster and make a set of webservers that not faster than any single box but is a lot more reliable. The TCO is all wrong for it you would be better off getting a couple modern PC's and making an active active cluster out of them as it will be cheaper to power and have a lot more ram. A simple shared nothing cluster can make compiling something big like a kernel faster than a single machine but again a single modern box with more memory will do it faster. Abotu the only thing a pile of pentiums is realy good for is IO bandwith as the PCi bus hasent gotten any better since then but thats only usefull if you need to do a lot of IO.
This sounds like pretty basic forwarding. Why do you have to restart your bind when the VPN is up? Are you trying to make it run as a secondary or something? Check out something like (this was the first match on google) http://www.zytrax.com/books/dns/ch7/zone.html you just specify one for the forward and reverse domains of your office to your office nameservers.
Most people that complin about bind dont seem to know how to use it funny as it's got to be the most well documented and standard off all DNS servers.
Your talking about mesh networking. TCP/IP does not work well in large meshs. Addressing is an issue. Routing is an issue. If you can design or find a routing protocal that can deal with billions of routes in a secure manner it might work. Right now TCP/IP has big limits if you want to have stable packet ingress and egress you have to run BGP there is a limit of 65k BGP networks world wide.
Having said that you can design small meshes that run fairly efficiently. The mesh has to have border points and inside points. IPv6 works well for inside addressing just use a private range and the mac address to remove any need for centralized authority. All Border points need to make tunneles via the normal internet to each other and NAT IPv6 to IPv4 for any other point. The point should keep the status of any NAT translations and pick there border point. Border points submit packets including there avalible bandwith, when retransmitted there should be a list of points traversed along with bandwith and latency data. Points pick the best border point based on avalible bandwith, hop count and latency. The Border point if it accepts the session sends back a NAT packet giving the details of it's outside IP and how things got nated.
Now thats a whole pile of extensions to a layer 3 protocal to get things done without rewriting the internet as it exists now. It would be somewhat problematic to get into a handheld device as it's pretty much making a statefull router out of every device that requires memory and lots of packets.
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Nope HP ships the part you replace and then you ship back the defective part and they ship you a 32 meg usb flash drive for your trouble and returning the bad ram.
It allows you to realy use SAN's it's a filesystem that allows multiple readers and writers on one real disk. No other standard linux FS does this but there are add on ones that have similar functionality and work better or worse on different hardware/OS's. Realy what it means is you can have say 10 servers all serving up the same content by all looking at the same set of disks. This is extreamly usefull in tightly packed clusters that need to share large data sets (things that just dont fit all into ram) or HA/HP clusters to serve up ritch media like streaming video (Most web data is to trivial to replicate to make this worth it there but when your talking about TB's of streaming content it's non trivial to use a lot of redundant disk/replicate)
It's a free email account for starters. Realy do people realy expect them to investigate??? I work with ISP's the the procedure at all of them has been shut down instantly anybody thats accused of spamming and let them complain and then look at the account there are so few false positives this makes sence from an efficiency standpoint. I more wonder if they bothered to send an email to the account stating this and how to fix it, it would also be nice if incomming mail still works. The fact is if you dont react instantly then your going to get on the RBL's and loose ALL your customers in the long run.
SBC is CT is pretty bad for corperate and home customers. Tech support is in Flordia and dosent have a clue whats going on and they have a ho hum additude about fixing even corperate leased lines. I'm a network guy that had been working in the CT area for 15 years or so. SNET was the same before them.
Personaly I changed over to cable and while there were piles of issues to start (leaving rg59 access cable in did not help) but since then it's been rock solid. This is compared to DSl with an outage generaly state wide once every few months.
Well the point being is that the SMTP server should only accept authenticated single hop mail on that port that from it's domain and it can verify the username/password. Realy it's ment to get around all the hacks to close open relays that broke laptops and other mobile users.
I guess read the piled one RFC quotes :) But yea like I said 587 is the RFC standard port for a MUA to talk to a SMTP server. SMTP servers talk to other SMTP servers via port 25 to perserve backwards compatability.
Why dont you get with the rest of the planet and use 587 for client mailers to connect to your server and run authentication??? It's a port that shouldent be blocked by anybody but a corperate system and if they are blocking it you shouldnt be trying to get around it :)
OK this is pretty OT as well but I'll have to agree to many people have no depth. But in reviewing a canidate it's generaly better to try and figure out how quickly they can get some depth. And knowing a little bit of everything and being able to go deaper quickly can make you a great CTO :) or consultant (IE not a temp staffer being called a consultant)
Yea you can become Bob's PC you can also become that random wallflower of a PC or some printer. This realy is what 802.11x is for so people authenticate to a server and get on the right vlan. Add to that Dynamic ports shouldent talk to other dynamic ports and lock any static ports like printers into there own little vlan that cant get out (Yes you can my them dynamic by MAC but they shouldent be roaming a static mac security pollicy add a little I guess) Add some switch level security so that workstations only get to talk to routers with the servers on a different vlan. MAC addresses are just to easy to clone.
our correct in your statement but your neglecting that most industrial hydrogen is made from and with fossil fuels. Granted you need to get the demand there then you can work on that but it's not realy a clean solution today it's just moving the polution to the factory/plant away from the car.
OK lets say your PC is drawing on average 300 watts not to hard to do with a modern machine. At 15 cents a kwh over a month thats slightly more than 32 bucks, my laptop maxes out at 60 watts and thats charging the battery it's normaly about 30 or a thenth of that figure but even at may I would be saving 26 bucks a month. I live in the north east so the cost is a lot higher than average here the best I could find was 2001 data that put it at 8 cents national residential average.
First off your off on your raid levels raid 3 is single drive parrity raid 4 is synced spindles single drive parity (better but requires drive support). Raid 5 is only slower than raid 0 if yoru running proper gear, granted I spend a lot of time on high end external raid controlers those low end scsi to pci garbage seem to have issues due to under powered controlers. But that being said I didn't clearly read the post he wanted it for a home server assuming cheap mirror sets of IDE disks with some striping mixed in if he needs speed.
As for pci to SCSI raid cards how many channels are you looking for I would assume you would want 3. I have used some LSI cards they work under linux pretty well the performance is better than most of the pci cards I have seen but still not great. If you do anything increase the cache size on it to max it makes a big difference in scatter gather operations that databases can be good for. Still if you need IO's per second go with and external controller you wont have any issues with linux as it looks like a single disk and you see it via a normal SCSI or FC card.
I think there is a level of trust issue. It's one thing to use plain text on UUNet's backbone it's alother to use it on some guys wifi that he is letting the world use. Your shouldent trust either of them but I would trust UUNet or another backbone to not care about my email password a lot more than joe geek with a free wifi AP. Granted I run everything though SSH, IPSec and SSL either way. And BTW they can see whats inside your encryted connection it will just take awhile encryption does not make anything perfectly secure just secure long enough where it hopefully dosent matter. I may be biased in this I work for large slace networks and can attest that in general we dotn care abotu your logins it's not even fun to look, a 14 year old sharing out his cable modem might be a lot more interested.
If your running a fileserver with a decent ammount of writes yours going to want RAID5 as it has the least penalty. Hot swap drives are easy enough with SCSI or FC a bit more complicated with SATA and rather complicated with IDE but can be done. For a simple setup as little as 3 disks will do and you will get 2 disks worth of space performance setups will have more spindles. You didn't state as to what sort of load your expecting and that makes a huge difference. For the ultra cheap I have picked up IDE raid 5 cards supprting 4 drives with hot swap for sub 30 bucks on ebay they will only work with 120 gig drives max and are limited to ultra 66 but thats a third of a TB usable as well for a few hundred bucks and it's performance is good enough for a 100bt file server.
Using somebody elses network is similarly insecure. Setup airsnort and see how much traffic is plain text out there on a public wifi you will see piles of pop3 logins because all to often they are allowed.
It's a bit over hyped for big desktop replacement laptops (I own 3 of them) where they need to be pluged into power anyway. But for a PDA bluetooth or 802.11(abg) is rather usefull as they can get out get your mail sync etc, same goes for small light weight laptops that have decent battery life. As far as cell phones it's all about how you use it, I have a cell phone that nobody calls me on unless it's important as in router down (I'm a network guy) as in I take one or two phone calls a business day on it. It's about lifestyle as well, I take an hour plus ride on the train each way a cellphone with bluetooth, laptop and pda allows me to get on the internet to read my personal email web surfing etc without looking like a moron with piles of wires hanging around. At work wifi is nice for laptops that you might be taking around working on the network, and the usual PDA functions. I wouldent call it expensive tech either 802.11b devices run about 20 bucks less than a stack of DVD-R's or a decent sized USB key.
Yes DSL can be run naked down the copper pair. And just go with vonage for the phone provider. I just made the full out switch when I moved I dumped DSL and picked up cable with no issues except SBC sitting on the number transfer.
Dish Network's customer services is horid and they like to charge and hold onto funds forever. There compression quality is pretty bad as well as compared to Directv. In my own case I got the equipment and service from directv got the install signal strength in the 90's good line of sight etc all with a 30 day no penalties right of return. Well there compression is horid it's as bad as my local cables digital offerings or directv's local channels. So I called up to retunr it. That took nearly two hours mid afternoon on a weekday between operators that insisted I had a year contract etc etc etc, a manager finialy honored there contract and accepted the cancelation and told me to call the installer to pick up the gear. Funny the installed didn't want to and took 3 weeks to do so even leaving me the dish on the roof. 3 months later a funny charge showed up on the plastic I used to setup the account for like 400 ish from them. I called and it tooks hours and hours with them insisting that I broke contract. I had to fax them the recipt for the returned equipment and my contract with the 30 day return 3 seperate times. They then claimed that I didn't realy cancle till the equipment was picked up not when I called them so was over the 30 days and still owed them. A round with my credit card company and the BBB finialy got it resolved and a credit nearly 4 months after they charged it.
I have had Directv for six years now and have never had those issues. One bad tivo in shipping but nothing like this experience. I'm comparing service on a wide screen CRT and DLP rear screen and dish has much more noticable compression artifacts to my eye. Directv I beleive has the ability to alocate varing ammounts of bandwith on a per channel basis where dish is fixed meaning that cnn dosent look as good as HBO but who cares about CNN but your HBO HD should look great.
Again this is just the comments of one person with a bad experience with dish.
You sound a lot like me ten years ago though probably with a shorter attention span. Anyway here goes.
School well just get through it mentors are a good thing find a teacher with lots of short projects things that are hard to do but with short deadlines. To much in acidemia are these long term projects that get bogged down granted this is how some reasearch works and how many in corprate america do there day to day stuff.
Work it's all about saying yes. Allwasy say yes to any project get it started and have it's own life. You can make a lot more money as the idea person than the tighen the bolts write the piles of code person. Write the core prototype code the functional type but dont let yourself get bogged down in writting error checking rutines or pretty gui interfaces. You need to impress people that you can get the idea end of it through prototype and that it's more valuable to have you work the next idea than play with pretty gui's or bells and wistles for the marketing people. Consulting is a good section to be in as you move around a lot and are to expensive to give the drudgery to.
I'm not an audio purist but it would see reasonable to ask for basic specs like S/N to comapire pirce vs performance. Granted if I use of one of these it would be via the optical out and move the DA stage to something that I trust. This box might make the wife factor in place of the existing pile of PC gear in the basement that uses some long runs of optical and coax cable though the walls (existing setup)
For something slightly OT I would have to agree people will listen to noise I guess all the pop junk deadens there ears to noise. I can listen to eminem but it should still sould as good as the source. I realy ont see what cost there is to listing a S/N they list every other spec anyway it's just something anything should have. It's not like asking for freq responce curves or something exotic.
Am I the only one that is missing audio specs from this? Simple things like signal to noise on the analog audio out would be nice same for things like how many channels I'm assuming a sterio pair but can it do 5.1 6.1 or 7.1 on the optical out? It seems ot only be able to repeat the wifi but claims bridging might this be the nearly perfect tv room accessory? I could see a sterio connection with a wired ethernet bridge for the console/tivo and a wifi repeater for better signal strength.
I cut my teeth on apple back whe a Mac 128 was current. They seemed to have been moving father and farther from being tied to any specs in the last 10 years.
I guess you missed all that time where they were the worst abuser of the global BGP tables?
There are a lot of types of clusters. You could put those 8 boxes together in a shared something cluster and make a set of webservers that not faster than any single box but is a lot more reliable. The TCO is all wrong for it you would be better off getting a couple modern PC's and making an active active cluster out of them as it will be cheaper to power and have a lot more ram. A simple shared nothing cluster can make compiling something big like a kernel faster than a single machine but again a single modern box with more memory will do it faster. Abotu the only thing a pile of pentiums is realy good for is IO bandwith as the PCi bus hasent gotten any better since then but thats only usefull if you need to do a lot of IO.
This sounds like pretty basic forwarding. Why do you have to restart your bind when the VPN is up? Are you trying to make it run as a secondary or something? Check out something like (this was the first match on google) http://www.zytrax.com/books/dns/ch7/zone.html you just specify one for the forward and reverse domains of your office to your office nameservers.
Most people that complin about bind dont seem to know how to use it funny as it's got to be the most well documented and standard off all DNS servers.
Your talking about mesh networking. TCP/IP does not work well in large meshs. Addressing is an issue. Routing is an issue. If you can design or find a routing protocal that can deal with billions of routes in a secure manner it might work. Right now TCP/IP has big limits if you want to have stable packet ingress and egress you have to run BGP there is a limit of 65k BGP networks world wide.
Having said that you can design small meshes that run fairly efficiently. The mesh has to have border points and inside points. IPv6 works well for inside addressing just use a private range and the mac address to remove any need for centralized authority. All Border points need to make tunneles via the normal internet to each other and NAT IPv6 to IPv4 for any other point. The point should keep the status of any NAT translations and pick there border point. Border points submit packets including there avalible bandwith, when retransmitted there should be a list of points traversed along with bandwith and latency data. Points pick the best border point based on avalible bandwith, hop count and latency. The Border point if it accepts the session sends back a NAT packet giving the details of it's outside IP and how things got nated.
Now thats a whole pile of extensions to a layer 3 protocal to get things done without rewriting the internet as it exists now. It would be somewhat problematic to get into a handheld device as it's pretty much making a statefull router out of every device that requires memory and lots of packets.