Re: [vox-tech] OMS
I'm a little familiar with OMS's, having worked for Wall St. companies for a number of years. But I've never worked on one directly, or studied them extensively, so I couldn't recommend much. Best I could offer would be some search terms to use at Google or Amazon: OMS, "order matching system", "trade blotter"/"trading blotter", "matching engine", ECN (http://www.investopedia.com/terms/e/ecn.asp), etc. HTH, DR On 10/08/2009 09:14 PM, Hai Yi wrote: > David, your assumption is correct, I was referring to the OMS module > in a trading platform, in which buy/sell negotiations is carried out > in a frequent fashion. Thanks for the link, just curious if we can > have more reading materials on this subject, either online or from > Amazon, :-) > > Hai > > > On Thu, Oct 8, 2009 at 10:22 AM, David Rosenstrauch wrote: >> BTW, just a heads up that I'm assuming you meant the finance-oriented >> definition of OMS. Apparently OMS can mean something else though when >> you're referring to a different industry, like e-commerce - in which >> case an "order" means someone ordering products online. (See >> http://en.wikipedia.org/wiki/Order_management_system for more details.) >> An e-commerce OMS would not need to match buy and sell orders, >> obviously, and so it's most important component would be very different. >> >> If you are referring to the finance-oriented definition of OMS, though, >> you can read here for more info: >> >> http://www.investopedia.com/terms/o/oms.asp >> >> HTH, >> >> DR >> >> On 10/08/2009 07:48 AM, Hai Yi wrote: >>> Thank you, David, I think you are right. Do you know any books >>> (articles ) on this topic that I can use for further study? >>> >>> On Wed, Oct 7, 2009 at 9:18 PM, David Rosenstrauch >>> wrote: >>>> On 10/07/2009 08:11 PM, Hai Yi wrote: >>>>> anyone ever worked on OMS (Order Management System)? I was asked >>>>> what's most important component (idea of design? ) in an OMS system. I >>>>> thought it's a state machine conducting the negotiations. >>>>> >>>>> Comments are welcomed! >>>>> >>>>> Hai >>>> I'd figure the most important component is a matching engine - i.e., >>>> matching buy and sell orders. >>>> >>>> HTH, >>>> >>>> DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] OMS
BTW, just a heads up that I'm assuming you meant the finance-oriented definition of OMS. Apparently OMS can mean something else though when you're referring to a different industry, like e-commerce - in which case an "order" means someone ordering products online. (See http://en.wikipedia.org/wiki/Order_management_system for more details.) An e-commerce OMS would not need to match buy and sell orders, obviously, and so it's most important component would be very different. If you are referring to the finance-oriented definition of OMS, though, you can read here for more info: http://www.investopedia.com/terms/o/oms.asp HTH, DR On 10/08/2009 07:48 AM, Hai Yi wrote: > Thank you, David, I think you are right. Do you know any books > (articles ) on this topic that I can use for further study? > > On Wed, Oct 7, 2009 at 9:18 PM, David Rosenstrauch wrote: >> On 10/07/2009 08:11 PM, Hai Yi wrote: >>> anyone ever worked on OMS (Order Management System)? I was asked >>> what's most important component (idea of design? ) in an OMS system. I >>> thought it's a state machine conducting the negotiations. >>> >>> Comments are welcomed! >>> >>> Hai >> I'd figure the most important component is a matching engine - i.e., >> matching buy and sell orders. >> >> HTH, >> >> DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] OMS
On 10/07/2009 08:11 PM, Hai Yi wrote: > anyone ever worked on OMS (Order Management System)? I was asked > what's most important component (idea of design? ) in an OMS system. I > thought it's a state machine conducting the negotiations. > > Comments are welcomed! > > Hai I'd figure the most important component is a matching engine - i.e., matching buy and sell orders. HTH, DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] sshd not reaping my login shell
On 10/02/2009 02:21 PM, Ken Bloom wrote: > When I ssh from little-cat-a to cat-in-the-hat, exiting the login shell > on cat-in-the-hat doesn't end my ssh connection. After running ps on > cat-in-the-hat, I noticed that the login shell in question was still > sitting around as a zombie process, meaning that sshd isn't reaping the > shell. > Anybody seen this before? Anybody know how to fix it? Anybody know where > to report a bug? When I've seen this behavior happen it's been legit and not a bug. I often ssh using the -L option to set up a port tunnel. (e.g., to the mysql port on the remote box) If I try to exit the ssh connection while another app is still using the tunneled port the ssh connection will stay open, even though I already told it to exit. Once I exit the other app, of course, the ssh connection then closes. Any change you're doing any port forwarding/tunneling? HTH, DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] can't remove postgresql
On 08/18/2009 12:07 AM, Hai Yi wrote: > hello all: > > I noitced that postgresql has been installed on my ubuntu box, i no longer > use it, but there are few entries of postgresql in the application menu and > becomes a eyesore. > > I tried to remove it by launching: > > sudo apt-get -f remove postgresql > > the message shows: > > Reading package lists... Done > Building dependency tree > Reading state information... Done > Package postgresql is not installed, so not removed > 0 upgraded, 0 newly installed, 0 to remove and 97 not upgraded. > > > However, if I use nmap to test the running apps, it shows: > > PORT STATE SERVICE > 22/tcp open ssh > 631/tcp open ipp > 5432/tcp open postgresql > 8009/tcp open ajp13 > > > > I am confused, anyone has any idea? > > Thanks, > Hai Sounds like you removed the software, but didn't shut down the running postrgresql server first. The only way nmap would show the port as open is if the postresql daemon was up and listening on that port. DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] Real VNC #$%!!
ALLO (Alfredo Lopez De Leon) wrote: > Hi, I am using Real VNC to connect to a Linux server(s) when I work > from home and I need to run X-applications. However, it is a pain in > the neck that I cannot do copy&paste between my WinXP laptop and my > Linux servers through Real VNC. A Google search shows that the > problem is that RVNC uses the cut buffer instead of the copy. Is > there a solution to this? Is there another VNC client that will do > copy& paste? At work I use Xwin-32 and it works well, but it not > efficient to use Xwin-32 over a VPN on a slow DSL. > > Thanks for any comments. > > Cheers! Alfredo Lopez Novozymes, Inc. 1445 Drew Ave Davis CA 95618 > United States There's TightVNC and UltraVNC, but I haven't used either one so can't advise on clipboard capabilities. Another option would be to use NoMachine's NX instead of VNC. Pretty much identical capabilities as VNC, and it's supposed to be faster too. I just verified that copy and paste from client to server works under NX (or at least it does when testing with two Linux+KDE machines). HTH, DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] Window Managers
Rod Roark wrote: > I have a hosted server running Ubuntu 8.04 and would like to install > a simple, lightweight window manager for use with VNC. Mostly this > is so I can conduct shared sessions for working with others. Ideally > it would be reasonably intuitive for those familiar with Windows, > Gnome or KDE. > > Problem is, there are too many choices! aewm, blackbox, evilwm, > flwm, fvwm, icewm, jwm, lwm, metacity, tinywm, twm, and more. > > I tried twm and metacity so far. twm is ugly. metacity is nice but > doesn't do much by itself (e.g. no task bar or launcher), and adding > gnome-panel or gnome-control-center brings in a whole bunch of stuff > that I don't want or need. > > Any suggestions? > > Thanks > > Rod icewm is very lightweight, as well as pretty Windows-user-intuitive. Personally I prefer fluxbox for my lightweight WM needs, but it's probably less intuitive for a Windows user. HTH, DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] looking for a new video card
I've been using this fanless card, and it's been working out fine for me. http://www.newegg.com/Product/Product.aspx?Item=N82E16814102724 That said, it's a pretty low end card. (I'm not a gamer.) HTH, DR Scott Miller wrote: > Hey Dylan, > > You can buy a passively cooled video card that cools without a fan and > is silent. Here is one, for a random example: > > http://www.newegg.com/product/product.aspx?item=N82E16814150286 > > It can be hard to find super high-end video cards that are passive, > but you can find decent ones. > > Scott > > > On Thu, Feb 5, 2009 at 09:52, Dylan Beaudette wrote: >> Hi, >> >> I had been hearing an annoying hum from my machine for a couple days now, and >> took it apart this morning to find the fan on the video card buzzing in >> place. Cycling the power resulted in a brief attempt at turning on, and then >> the system shut off- as if there were an excessive power draw / powersupply >> failure. >> >> Unpluggin the offending fan on the video card resulting in a normal power-on, >> although now the video card is running hot. The card is : >> >> nVidia Corporation NV31 [GeForce FX 5600XT] (rev a1) >> >> I would like to stick to nVidia, as the accelerated hardware is fairly well >> supported. Ideally a card without fan would be nice. >> >> An alternative would be to replace the fan on the video card. Does anyone >> have >> experience in something like this? There are some resources on the internet, >> but I thought I would also ask here. >> >> Finally, is there any potential for melt-down if I operate this video card >> without a fan? >> >> Thanks! >> >> Dylan ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] Automatic wifi settings on boot?
Bill Kendrick wrote: > Is there an easy way to get a Linux laptop to connect to one of > a number of wireless networks, based on which ESSID it sees? > > Last time I checked (kernel has upgraded since), my wifi gets kind of > finicky if it tries to connect to a WAP that isn't there. > (e.g., if I leave my home WAP, which requires a key, in > /etc/network/interfaces but then go boot up at Mishka's or Common Grounds, > it seemed like I needed to alter 'interfaces' and then do a reboot to > ever get it to work... just running 'sudo /etc/init.d/networking restart' > didn't seem enough.) > > Once upon a time, I tried providing various interface variations in > /etc/network/interfaces (e.g., "eth1-home", "eth1-mishkas") > but either did it wrong, or it didn't work. :) > > Any tips or links to good howtos? (This is on ubuntu 8.10 btw) > I've been using the NetworkManager daemon (in conjunction with the knetworkmanager applet for KDE) for wifi in recent years. (There's also a similar applet available for GNOME.) The combo of the 2 of them basically gives you the kind of wifi functionality available in Windows - i.e., view available wireless networks, choose a network to connect to, have it prompt you for a key, have it remember the key (using KWallet) so that it will automatically connect to known networks in the future without you having to re-enter the key, etc. NetworkManager can be a bit kludgey sometimes. (The daemon crashes on me periodically.) But it generally does the job pretty well. IIRC, wicd is another applet that does similar, if (k)networkmanager doesn't cut it for you. HTH, DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] Wireless Network Tool
Aaron Brayton wrote: > Hello, > > I'm looking for a tool that displays the available wireless networks > within range and the associated details about those networks, type, > channel, strength, etc. > > I've looked at Prismstumbler and Wifi-radar but they don't seem to be > what I'm looking for. > > Does anyone have a suggestion? > > Thanks! > Aaron Would networkmanager + knetworkmanager/nm-applet work? DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] video for Apple ipod touch
Hai Yi wrote: > Hello all: > > It looks like that ipod touch only support mp4 videos format (maybe > others too, but I don't know). I managed to use ffmpeg to convert the > .avi files to .mp4 files, but it seems I couldn't get the parameters > right, some produced weird voice, some have no voice at all, and the > width-height ratio is not nature. Does anyone out there know how to > get them right? > > Appreciated any help! :-) > > Hai I use these parameters to do it: [dar...@darsys9 ~]$ cat bin/avi2ipod.sh #!/bin/bash # # courtesy of https://help.ubuntu.com/community/iPodVideoEncoding # except changed to use vcodec libxvid instead of mpeg4 ffmpeg -i "$1" -f mp4 -vcodec libxvid -maxrate 1000k -b 700k -qmin 3 -qmax 5 -bufsize 4096 -g 300 -acodec libfaac -ab 192k -s 320x240 -aspect 4:3 "$2" e.g.: avi2ipod.sh SomeMovie.avi SomeMovie.mp4 HTH, DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] Firewall (Firestarter question)
Aaron Brayton wrote: > I've successfully installed firestarter and have it load upon startup. > However, it loads before the wireless is connected and therefore gives > me an error message, which is rendered moot 10 seconds later when the > wireless makes a connection. > > Is there a way to eliminate this error message, either by letting > firestarter ignore the error or delaying firestarter from starting until > after the wireless connection is established? > > Or should I be using a different firewall like KMyfirewall? > > Thanks! > Aaron I use firestarter too, but never really ran into this issue. KDE tries to load it right after I log in, but since the GUI requires a root password to launch (at least I think it does), KDE can't just launch it and instead it pops up an "enter root password" dialog. I just leave that dialog sitting there till after I connect, then I come back and enter the password and start firestarter. Since at that point it's connected, no error message then. This approach workable for you? HTH, DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] a reboot powers off machine
Scott Miller wrote: > Issuing 'sudo reboot', 'init 6', 'shutdown -r now', etc. powers off > the machine. No reboot. At the end, the last message I see is: > > Will now Halt > Maybe this thing is too old to have proper power management? > > Scott That would be my guess. i.e., machine is too old to use ACPI or APM on it. DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] dual system
Cam Ellison wrote: > Carl Boettiger wrote: >> certainly it's easier if xp is installed first, since the Ubuntu >> installer takes care of everything, even copying bookmarks. >> >> With Linux on first, you'll just need to partition and then reload >> grub using the live-cd. It's described here: >> http://apcmag.com/how_to_dual_boot_linux_and_windows_xp_linux_installed_first.htm?page=1 >> >> > Of course, you have the first partition available for XP, do you not? > Unless MS's approach has changed radically, it will not boot unless it's > in the initial partition. > > Cheers > > Cam There's a way to tell grub to fool windows into thinking it's on partition 0, IIRC. DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] Running 64 bit Ubuntu
Alex Mandel wrote: > Brian Lavender wrote: >> What are people's expierence running 64-bit Ubuntu? >> >> brian > > Great. Occasionally something won't be available in 64bit (Like Flash > for a long time) and you either need to compile it yourself or run the > 32bit version with forced architecture or via a 32bit chroot(I prefer > option 2) Just for another data point: I'm running a different distro in 64-bit (Arch) and the only issues I've hit are: * flashplayer (worked around with nspluginwrapper) * java plugin (worked around with openjdk/icedtea) * virtualbox ose won't build (worked around by using virtualbox non-free) > It's really the only way to go if you have 4GB of ram or more, and it > seems kinda silly to not keep up with the cutting edge. +1 DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] grabit
harke wrote: > Is anyone here familiar with a windows app > called grabit? I is used to view and download > from binary usenet groups. > My wife has been using it and it totally hoses > our DSL link for anything else. Worse, even when she stops > it continues to run in the background. Also, it apparently > advertises so we get incoming connect requests. These are > blocked by the router but they still act like a denial > of service attack. > > Does anyone have a way to live with this? (Short of removing > it entirely) > > Richard Harke I'd vote for removing it entirely. Mozilla Thunderbird can do usenet. HTH, DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] mystery error when connecting USB HD
Dylan Beaudette wrote: > Hi. > > Recently upgraded my kernel and noticed the following message when connecting > an external USB HD: > > > [111490.755865] attempt to access beyond end of device > [111490.755865] sdc: rw=0, want=586072369, limit=586072368 > > With the the previous kernel it just read: > > Buffer I/O error on device sdc2 > > Any ideas on how this may have happened or how to fix this? > > Thanks, > > Dylan Funny you should ask this. I just ran into this exact situation 2 days ago, and so (assuming you're running into the same issue that I did) I know the problem - and solution - pretty intimately. I was setting up a new server, and was moving the old (IDE) hard drive from the old server to the new one. And all of a sudden the new server started barfing those messages on the drive, when I never had any problems with the drive in the old server. Turns out the issue was something called an HPA - a Host Protected Area - on the drive. (See here for more details: http://en.wikipedia.org/wiki/Host_Protected_Area). The new server was not recognizing and reading the HPA, and so it looked to the OS like the disk was smaller than it is. Hence all the error messages. The cause for me was that the old server was loading and using ide interface kernel modules (e.g., piix.ko) for accessing the drive, while the new server was using only sata modules (e.g., sd_mod.ko). For some reason the sata module wasn't recognizing the HPA. Once I identified the problem, and had the new server load its appropriate IDE module (amd74xx.ko) everything worked fine again. Now that I'm using the IDE module, the server now spits out an appropriate message during boot (i.e., to dmesg) informing me about the HPA: hdb: Host Protected Area detected. current capacity is 234375000 sectors (12 MB) native capacity is 234441648 sectors (120034 MB) hdb: Host Protected Area disabled. hdb: 234441648 sectors (120034 MB) w/8192KiB Cache, CHS=65535/16/63 So try to figure out what's the appropriate IDE module for your mobo and load that at boot-up and the problem should go away. HTH, DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] why is bash more intellegent on my home computer?
Dylan Beaudette wrote: Hi, Just installed Debian/Sid on a home computer, and notice that bash will autocomplete parameters for many of the applications which I use. For example, I can type sudo aptitude ins .. and 'tall' magically pops up. My Debian/Sid machine at work does not do this... anyone know why this might be ? cheers, Dylan Maybe its using zsh instead of bash? DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] home network - how to make a UNIX known to the other PC (Windows)
Hai Yi wrote: This might be a very simple question, so forgive me if it is. I have two PCs at home. One is Ubuntu the other is Windows XP. Ubuntu machine has a name "zodiac", how can it makes it known to the Window XP machine? I want to install a tightvnc server on Ubuntu and a client on Windows so it can visit the Ubuntu. I guess I need to modify the hosts and network files on Win XP to include the IP and name of the Ubuntu machine? Thanks for your help! Hai Basically the problem is that you have no DNS server on your local network, so the boxes don't know each others names. So you can choose either a) the hard-coded solution (i.e., modify the hosts files) or b) the dynamic solution (i.e., run a dns server on your network). I do the latter. But FYI - there's no need to run a full-fledged (and complex) BIND server. There's a small DNS server that's perfect for small home LAN's, called dnsmasq. It's a combination DNS and DHCP server. So I've configured the linux server on my LAN to run dnsmasq (and thus serve as the DHCP server dishing out IP addresses) and to tell each box to use dnsmasq as its DNS server. And voila - all the boxes can now access each other by name. So if you feel like working a bit more for the "right" solution, try giving dnsmasq a shot. DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] bootloader
FYI - one other thing to be aware of in this type of dual boot setup: Windows needs to be on the first sector of the first hard drive (i.e., hd0,0), else it gets very grumpy. So be aware that you must make the Windows disk hd0, and not hd1. I realize that that probably pokes a bit of a hole in your configuration, as it sounds like you want to use grub to control the boot selection. But given this setup, IIRC I think you'll have to let the MS boot loader do it instead. (If you, say, had Windows and Linux installed in different partitions on the same drive, then I think you wouldn't have to. But since you've got one disk all Windows (and which I'm assuming you *don't* want grub installed on, since you might want to later use this drive in a different, windows-only box) and one disk all Linux, I think it'd need to be done this way.) The way you do that is you put a Linux boot record file on the c: drive and then add Linux into the MS boot loader menu. This will cause the MS boot loader to let you choose between Windows and Linux. When you choose Linux, it will then transfer control over to grub. My laptop is set up this way. Google around on "windows linux dual boot" or some such, and you can find all the details. HTH. Feel free to email back if you get stuck. DR Wade Pinkston wrote: this is from my /etc/grub.conf (/etc/grub/grub.conf) for your situation you would just change hd0,0 to the drive,partition of you winblows install title winblows rootnoverify (hd0,0) chainloader +1 Jimbo wrote: I have grub as a boot loader. I have wondoze on one drive and linux w/ grub on the other. If I want to change drives I have to go into the bios and change hdd priority. Alex I should have set this up at the installfest but I didn't. Now I wish that I had. Can I config grub to load up windows even though it is on another hard drive? I have a program called drak and it gives boot options but it doesn't seem to point correctly to the other hdd. The closet option to my sata drive it gives is dev/sda1 . I believe that I need to set it at dev/sda but unsure. Jimbo ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] white screen
Jimbo wrote: I think that you might have something there. I did set beryl (and 1 other 3d thing, can't remember the name) just before I shut down the computer. How do I disable this? I don't want to get ris of it because I think my video card can handle it very easily. I don't think that I have a cheap card, yet. nvidia 8800gtx. Jimbo Could you be experiencing this bug? http://bugs.freedesktop.org/show_bug.cgi?id=9456 I ran into this a while back. Don't recall OTTOMH how it got fixed. I think my distro just finally upgraded to a newer version of some package. HTH, DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] FQDN
Richard Crawford wrote: I'm finding that quite a lot of email I send from my server at home is being bounced by various services because my server does not have a "Fully Qualified Domain Name". I'm not certain, however, how to go ahead and set this up. I have a static IP address, and an account at dyndns.org that points to it (stonegoose.homelinux.net), but beyond that I'm a bit confused. My Googling indicates that this would be easier to set up if I had an actual domain name that pointed to my server, but I don't. Anyone got any advice for me on this apparently basic issue? The way I deal with this is to configure my SMTP server to use my ISP's SMTP server as a smart host. So my emails get routed from my server, to my ISP's server, and then out to the Net. Since receiving SMTP servers see the sending server as belonging to my ISP, my messages don't get rejected. Google on "smart host" and your MTA's name for more details. HTH, DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] dhcp vs static hosts file
[EMAIL PROTECTED] wrote: I'm now on a home network where IP addresses are handed out dynamically by the router/bridge/DSL modem combo. Suppose I have two Linux computers, Satan and Lucifer. Now that I no longer have predictable IP addresses on the home network, how do I accomplish something like: satan$ ssh [EMAIL PROTECTED] when there's no longer a valid /etc/hosts file? Thanks! Peter Turn off DHCP serving on the router. Then pick one of your linux boxes to be your new DHCP plus DNS server for the LAN. Then install and configure dnsmasq (http://thekelleys.org.uk/dnsmasq/doc.html) on that box, and it will solve your problem. Dnsmasq is a perfect little util for exactly this situation: a small DHCP server which has a built-in DNS server - unlike most small LAN routers, as you've seen. I've been using dnsmasq for a few years now, and it works like a charm. It took a little bit of trial and error at first to configure it right, but after that it was "set it and forget it". If you have any probs. configuring it (or want to see a copy of my config), email me back on or off-list. DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] why does HAL hate me
I ran into this too recently. Problem seems to be an issue of your user being a member of the right groups. On my distro (Arch) once I added myself to the groups "optical" and "storage" and then (important!) either logged out or rebooted (I can't remember which) the problem went away. Depdending on what distro you're using, the group names may be different (e.g., I think Debian might have a group "hal" that you might need to add yourself to) but once you get yourself added to the right groups (and reboot!) the problem should go away. BTW, there's some info to be found by googling on the text of that Hal error message. HTH, DR Paul wrote: I just reinstalled hal to see if I could get it to work for me this time (last time I found that purging hal made everything work right again). Now, when I try to read a cd I get this message. "A security policy in place prevents this sender from sending this message to this recipient, see message bus configuration file (rejected message had interface "org.freedesktop.Hal.Device.Volume" member "Mount" error name "(unset)" destination "org.freedesktop.Hal")" I think it says that I haven't been anointed by some elite being to receive messages from my cd drive. I sure that someone out there could explain why it is good policy not let me receive messages from my cd drive but I would like to get it working. I think I have three choices: 1. apt-get --purge remove HAL (it worked the first time) 2. find all the HAL config files and change all "deny" to "allow". This probably misses the point but try understanding the HAL config file(s). If you have HAL installed take a look at /etc/dbus-1/system.d/hal.conf - pure gibberish 3 Ask somebody who knows what they're doing. Somebody - Anybody - HELP paul ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] spam current events
Peter Jay Salzman wrote: i'm getting hammered with email containing text designed to trick bayesian filters. unfortunately, it appears to be quite successful in that endeavor. the email text is nonsensical, however the email has a gif image attachment. at first, the gif was always named "image001.gif", and i was able to REJECT such emails when Postfix detected a gif attachment named "image001.gif". but whoever is sending this got smarter and now the gif file is named all kinds of things. i'm not quite sure how to filter these things anymore other than to REJECT all gif attachments, which I'd prefer not to do if i can help it.. the gif image itself is mostly white with a few colored "threads" here and there. i certainly don't see any text, so i'm not quite sure what their purpose is. perhaps it's some kind of virus? anyone else seeing these things? i'm getting them a few times a day now. pete I'm getting loads of these too, and it's similarly brought down the effectiveness of Thunderbird's bayesian filter. If anyone's got a solution, I'm all ears. Maybe someone should ask Paul Graham for a solution. :-) On a more serious note, though, I used to use the Popfile (popfile.sf.net) bayesian filter a while back and it was (at least back then) very up-to-date in terms of updating the filter to deal with new kinds of spam that were coming out. Might want to check the project mailing lists and/or source code and see if they've found any solution for this issue. HTH, DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] vox-tech Digest, Vol 24, Issue 5
[EMAIL PROTECTED] wrote: Hi, I get the message "Video mode not supported" it is in a box with a blue border. I haven't been in Linex for a while. I use Fedora 2.6.10-1.771_fc2 I went into 2.6.91.6_fc2 and got the same message. My computer is a PC4 1.5 with 512 Ram. That's usually a message displayed by the monitor itself, not the computer. The cause is that you've specified a video mode in your X config (i.e., /etc/X11/xorg.conf, /etc/X11/XF86Config /etc/X11/XF86Config-4, etc.) that your monitor is unable to display. Fix the video settings in that config file and that will make the problem go away. DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] Laptop WiFi Security
Bob Scofield wrote: I have two questions about WiFi security in laptops. (I don't have a laptop that allows me to do much WiFi, but I'm interested in these issues anyway.) If a person uses a WiFi connection at an airport, hotel, coffee house, etc. clearly the connection is not encrypted. I have been told that if you use an open connection, someone can get into your hard drive. That is, a hacker could read your files. This leads me to ask two questions. 1) One computer professional told me that the solution to the problem is to have firewall software on your laptop. He recommends Zone Alarm for Windows, but my interest is Linux. I know that SuSE comes with a firewall. My first question is: Is there a firewall package for Debian? Firestarter is a nice little GUI-based firewall. I use that and like it. 2) The second question is whether there is *any* merit in the following idea I thought of. Suppose you had a laptop that had a major Windows partition, and a major Linux partition on it. Suppose you also put a second very small Linux partition on it. The small Linux partition would be used exclusively for e-mail and web surfing at open WiFi connections. Would such a set up protect the files in the main Linux partition when the small partition was booted and being used with an open WiFi connection? I suppose one problem with such a Baroque set up would be that the password you use for e-mail on the small Linux partition would still be subject to theft by a hacker. So is there any value in this type of set up? Thank you. Bob I guess that would be effective ... as long as no one gained root access. (If they did, they could just mount the other partitions.) Personally, I think it's overkill, though. There's several security tweaks that I'd recommend doing to a laptop before even considering that, such as: * run a firewall, like above, and only allow port forwarding to a daemon when absolutely necessary * disable all unnecessary daemons - especially login shells like ssh, telnet, etc. Also samba too. * if you must allow ssh access, don't allow root logins, and only allow access via public keys instead of passwords * keep your systems up-to-date with your distro's latest security patches * since you're using an unsecured and unencrypted network, try to use encryption for outgoing traffic whenever possible - i.e., use ssh, https, imaps, tls, etc. If you religiously apply techniques like this, I'd say you'll be in very good shape security-wise, and there's probably no need to do what you're suggesting. It certainly can't hurt, but I think it provides not much benefit for the amount of work involved. Just my $0.02. HTH, DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] Re:mail server config question
Whoops - I think I confused you here. I assumed something about your setup that apparently isn't correct and so gave you the wrong advice. As you're obviously aware, an SMTP server can both receive incoming mail and send outgoing mail. However, very often someone will configure their network to have their SMTP server do only 1 of these 2 functions. That's what I have. I actually have 2 SMTP servers: a mail drop server out on the Net that receives email for my domain, and my main server in my home that I use for sending outgoing email. On the mail drop machine the SMTP server is configured to only receive emails, and not send any. On the home server, my firewall blocks the SMTP port from receiving any email. Squirrelmail runs on my home server. I use fetchmail to retrieve messages delivered to the mail drop, and pull them down to my home server. I guess I had assumed that you had a similar setup. The configuration that I've been describing to you is that of my home server (exim + courier-imap + squirrelmail + firewall), and since I don't receive any messages there directly that explains why I have a firewall blocking the SMTP port. I see now that you want to do this all on 1 box. And that certainly is do-able - even while still managing to block open relaying of messages. If you want to be able for the SMTP server on this box to both send and receive messages, while blocking relaying, configure your setup as follows: * use an SMTP server that is pretty well configured out of the box to block relaying. (Most of the major ones are these days I think.) I use and like exim, which has this. * configure your SMTP server so that it only will accept outgoing mail from specific machines on your LAN - or perhaps even just restrict this to localhost if there's no other machines on your LAN that you'll be sending email from. In my SMTP server (exim) I configure that with this line: hostlist relay_from_hosts = 127.0.0.1 : 1 : 192.168.0.0/24 * configure your SMTP server so that it only will accept incoming mail addressed to specific domains. In exim I configure that with this line: domainlist local_domains = @:localhost:darose.net * open the SMTP port in the firewall Apologies for the confusion. BTW, re: dovecot: I really can't offer any advice there having not used it. I can lend a hand with courier-imap, if you should decide to go that way. DR Cylar Z wrote: David: I double-checked and it turns out that the SMTP port *is* open on my iptables configuration. I don't know how it opened (maybe postfix did it) because I'm positive it was closed at the time I finished installing FC5 on the system. At that time I went in and opened 80 and 22, which is why I initially said only those were opened. Out of curiousity I shut the SMTP port, and sure enough, mail was no longer getting through *to* the server. (I was still able send mail out to other domains.) Receive capability was only restored when I opened the port again and rebooted. That having been said - do I need to worry about open relays or not? I would think *not* because I edited the Postfix's main.cf to "only forward mail from the local machine." In your opinion, did I go far enough? ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] re: mail server config question
Cylar Z wrote: Rick and David: Thanks for responding and for the tips. Looks like I've got some reading to do. Before I go any further with my configuration, I want to clarify something: When I said the word "firewall", I was referring to the iptables daemon that runs on the system, not a separate hardware device. You might have already known that, but I wanted to make absolutely sure. Iptables currently has ports 80 and 22 open, for http and ssh respectively. Does this information have any bearing on the discussion? Thanks, Matt I didn't realize that you were referring to iptables (I was referring to a separate hardware device) but the distinction is irrelevant. As long as your firewall - whether software or hardware - is blocking the SMTP port from the outside world, you have no relay worries. But squirrelmail will be able to use the SMTP server just fine. HTH, DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] mail server config question
Cylar Z wrote: I'm wondering - is there some sort of "yahoo-like" web interface I could install on my system? I'm not talking about a pop/smtp client like Outlook or Squirrelmail (which I am guessing is Outlook's Linux counterpart). If possible, I'd prefer to avoid setting up the POP3/SMTP functionality this would require, mostly because I've looked at the documentation for Postfix and can't see a way to do that without leaving an "open relay" that spammers could exploit. There really isn't a security issue. As long as your mail server box is behind a firewall, there's no open relay worries. I do this very thing, using squirrelmail, exim, and courier-imap. Yes, my server is listening on the SMTP and IMAP ports, but I don't have those ports open to the outside world. My firewall blocks them, but leaves open port 80 (and more importantly - 443, https). I can then access my mail system via squirrelmail over https. Squirrelmail, which runs in apache on the server, can then talk to the SMTP and IMAP daemons, but nobody else from the outside world can. HTH, DR ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
