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Comments:
<0> Anyway. If you set a particular segment value, you can get to 64K of memory at once
<1> ftp://ftp.simtel.net/pub/simtelnet
<0> If you want to get to a value within the same segment, that's a NEAR memory operation, and you only need the offset.
<1> cyeh, there ya go
<2> two9a that made a lot of sense
<0> To get outside your 64K, to video let's say, you'll need a segment and offset; that's a FAR op.
<2> thank u very much
<0> I have a talent.
<3> two just acts like he knows what he's doing
<3> he's all talk
<0> feti: It's all lies really
<3> i know it is
<0> I actually know nothing, I just pick it up from the radio waves in the air
<0> (Yes, there was a radio station discussing segmentation 5 minutes ago. They're on to protected mode now)
<2> two9a pirate radio??
<4> you have a talent? may I have it please?
<0> You can't have my talent, I need my talent to get paid
<4> fooey
<0> [I don't get paid, btw]
<2> two9a, buddy, i didnt see the problem with segmentation
<0> cyeh: It's not a very simple scheme, and it can get confusing to keep track of which segment you're in
<0> It'd be much simpler to provide a 20-bit address register
<0> Oh, and! What happens when you try to get beyond FFFF:000F ?
<2> violation
<0> Actually no. It wraps round to 0, on the 8086, and you start reading from the bottom
<0> On the 286 and above, you could get more than 1MB of memory, and there's a whole slew of hacks in place on that
<2> okay so real quick
<2> these old processors had 20 bit address busses
<2> so 1mb
<2> and then the segmented memory
<2> added how much
<0> Well, the segmentation process allowed you to get to all that 1MB through 64K chunks
<0> There was a runoff at the end of 65520 bytes
<0> (Which, theoretically, would wrap to the bottom 65520 bytes)
<2> how do you know all of this
<2> were you there??
<2> like 1992ish?
<0> "I WAS THERE WHEN IT ALL BEGAN" No, there are documents on this
<2> thanks pal, this is good information
<0> To be honest, it's useless info now; no-one's used a 286 or below for 20 years
<0> (Well, 10)
<3> i run this workstation off DSL linux on a 286 so shush
<5> 286 chip costs now well under $1
<5> wow weird konsole bug
<6> are you sure it's < $1?
<5> no
<6> :P
<5> do you think they are produced ?
<7> Aeon_: 286 chip *and* 286 machien =]
<7> Aeon_: 386 and 486 compatible are still produced for embedded appliances
<2> im sorry for doing this
<2> but i had a quick question
<2> if you have 64k per segment
<2> oops wrong place
<8> lol
<0> But the segments are seperated by only 16 bytes.
<0> Segment A000 is address A0000. Segment A001 is A0010
<7> What IP range should I move my network to?
<0> 172.24.155.x
<9> cyeh i found a pascal compiler for linux a few years back (fpc) and spent a few weeks goofing around with a crapload of old DOS source code things
<0> No-one'll ever find it there!
<2> vect0rx fun huh
<9> yeah it is.. i got my start with turbo pascal once upon a time
<9> so it was fun to relive it on a diff OS and try the socket API as well
<9> fun thing about DOS is interrupt vector 16h
<7> Two9A: Any particular reason?
<9> to tsr or time slice
<7> Two9A: I'm trying to avoid conflicts with others I might be on (VPN acts wonky otherwise)
<0> aedinius: Nah. I use 172.24.0.x though
<0> No-one ever seems to use 172.16.0.0/12, so you should be fine with something in there
<7> That's what I was thinking
<10> hmm it's not konsole
<10> local vim works ok
<7> Two9A: Thank you for the suggestion. I think it just won.
<10> remote vim scrambles tab chars
<10> what's this
<11> aedi
<7> Yes?
<11> whats soup
<0> Parse error.
<7> Migrating network to a new subnet
<11> :P
<11> http://www.dolox.com/portfolio/digitalhead.it/ -- check out the tetris remake i just made
<7> sed is my main tool for this task
<7> Heh, that was easy.
<12> what task?
<7> migrating this network to a new subnet
<7> Once I finish I just have to reboot this server for good measure and then make sure all the machines get a new IP
<8> DHCP is evil :P
<7> No, it's awesome
<7> It means I don't have to walk around to each machine and change the IP info
<8> it also means i can hook up to your network
<7> Does it?
<8> i dunno
<8> who knows :)
<7> YOu can hook up to a network without DHCP
<8> yes but then i have to spend 2 minutes sniffing it
<13> aedinius: BPF or PF_PACKET?
<13> Your preference.
<7> acid-: And what's to say that my network would give you a DHCP address anyway?
<7> It might not respond to your machine, and you'd have to sniff it anyway
<8> true that
<8> most administrators dont bother with mac specific dhcp's :)
<13> Why do you need to sniff his network "for 2 minutes" in order to "hook up to it"?
<8> i'd want to know which machines he got running there
<13> On a switched network, you require an MITM, in order to be transparent you have to do forwarding (meaning, you'll be implementing protocol layer too). So, you're pretty hooked the hell up at that point. :-)
<7> okay, dhcp, dns, and vpn are changed.
<7> Now.
<8> sbahra: ettercap will fix :)
<13> acid-: Yes, no need for 2 minutes. Broadcast ARP in most cases.
<13> acid-: nod, ettercap does that
<8> its funny
<8> i once wanted to play with ettercap
<8> i sniffed our entire network
<7> acid-: It was just an example, I have a guestxx range setup for friends.
<8> and then i shut it down, and the whole network went down :). so much for arp poisoning prevention switch :)
<8> aedinius: well.. you can also use ipsec, but lets not go too far
<13> Yes, that is only due to the detection stage, it will flood with a lot of ARP packets, a lot of routers are configured to shutdown temporarily (and flush) at that point.
<7> I forget where to set IP in NetBSD.
<13> You can either set a delay or just do a half-duplex attack.
<8> sbahra: hp procruve doesnt :)
<13> Latter being good enough for most networks anyways
<13> acid-: ah, lucky you. :-)
<7> ah, ifconfig.be0
<8> heh yea
<8> needless to say the CEO started shouting "exchange aint working!!"
<7> I should tell it 100BaseTX and not autoselect
<7> Now I can cross my fingers and *hope* this box comes back up
<0> Did he actually say "exchange" or did he just mention "my email"
<8> Two9A: heh, he's not that clueless :)
<0> Impressive
<0> I'd expect the CTO to say "exchange"
<8> it was still funny
<8> i managed to sniff so many p***words
<8> i just wanted to prove how insecure this network is.
<8> i think they got my point :)
<14> The only real solution is to run a VPN over the local network.
<14> (Or, what we do, kill anyone who puts an unauthorized device on the network)
<8> yea
<8> we go that road as well
<7> Ah, beautiful.
<14> What branch do you work for ?
<15> rkeene i prefer killing, it simplifies administration.
<15> less ppl, less work ;]
<7> I forgot to change the default route for the NetBSD box.
<7> Of all things.
<8> rkeene: im a senior developer
<8> rkeene: but im quite involved with everything technology related
<14> acid-, So you don't work for the military ?
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