IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 28 December 2007 (all times are UTC)
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| 00:34 | <vagrantc> daya: how are you trying to unmount it?
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| 00:35 | <daya> vagrantc, simple by right clicking the usb ICON
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| 00:35 | vagrantc, and umount the volume
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| 00:35 | vagrantc, It says can't determine the real path of the device:No such file or directory
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| 00:35 | <vagrantc> daya: you can just unplug the USB stick after 2 seconds of not using it
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| 00:36 | <daya> vagrantc, hm, But it mayn't write the data isn't it?
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| 00:37 | <vagrantc> daya: ltspfs unmounts the filesystem at the client side ater two seconds of inactivity
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| 00:37 | daya: so if you wait 2 seconds, it should be fine.
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| 00:37 | <daya> vagrantc, oh, But the icon still remains in the Desktop :D,
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| 00:38 | <vagrantc> daya: after you unplug it?
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| 00:38 | <daya> vagrantc, OK I will then not bother about it,
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| 00:39 | vagrantc, I have installed splashy in chrooted env. But splashy doesn't work,it says we have to edit grub,
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| 00:39 | <vagrantc> daya: to the server, ltspfs *is* mounted, but on the client, the filesystem is unmounted after two seconds. so the data is synced after two seconds of inactivity. when ltspfs is accessed, the client mounts the device again.
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| 00:39 | daya: are you using PXE ?
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| 00:40 | <daya> vagrantc, yes,
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| 00:40 | <vagrantc> daya: if so, you'll need to add the bootpromt options to /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default
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| 00:40 | <daya> vagrantc, isn't it possible to implement splashy,
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| 00:40 | <vagrantc> daya: i have never tried.
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| 00:40 | <daya> vagrantc, ye I have edited that file to include the keyword splash
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| 00:40 | vagrantc, but not succeed
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| 00:41 | <vagrantc> daya: have you gotten splashy working on a system with a hard drive?
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| 00:41 | <daya> vagrantc, In general system, ye,
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| 00:42 | <vagrantc> daya: there really isn't any significant difference in an LTSP environment
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| 00:43 | <daya> vagrantc, amm,
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| 00:43 | <vagrantc> daya: are the initrd.img files the same in /opt/ltsp/i386/boot and /var/lib/tftpboot/ltsp/i386 ?
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| 00:43 | daya: md5sum /var/lib/tftpboot/ltsp/i386/initrd.img* /opt/ltsp/i386/boot/initrd.img*
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| 00:44 | <daya> vagrantc, ye they must be by default isn't it I haven't changed any
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| 00:45 | <vagrantc> daya: if you haven't changed anything, then splashy wouldn't be part of the initrd.img at all ....
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| 00:45 | daya: it certainly isn't included by default
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| 00:46 | daya: how did you add splashy?
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| 00:47 | <daya> vagrantc, by installing pkg,instructed in http://splashy.alioth.debian.org/wiki/installation
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| 00:47 | vagrantc, It now seems to work but only for few seconds,
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| 00:48 | vagrantc, it gets loaded in the last momemt
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| 00:48 | vagrantc, can't I call splashy after dhcp , or tftp
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| 00:49 | <vagrantc> daya: i have no idea, i have never used splashy
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| 00:50 | daya: so what arguments did you add to pxelinux.cfg/default ?
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| 00:54 | <daya> vagrantc, DEFAULT vmlinuz splash vga=791 ro initrd=initrd.img root=/dev/nfs ip=dhcp s
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| 00:58 | <vagrantc> daya: seems like splashy was removed from testing in october 2006 ... it must have problems if it hasn't gotten back in
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| 00:58 | daya: why not try usplash?
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| 00:59 | <daya> vagrantc, usplash? ubuntu splash , does it need kernel patch,
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| 01:00 | <vagrantc> daya: no kernel patch
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| 01:01 | daya: i think debian-edu maybe uses usplash with etch
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| 01:01 | <daya> vagrantc, ok, I will then try it,
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| 01:01 | vagrantc,ye, have gone thru debian-edu once,
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| 09:40 | <mattwalston> Anyone know what could cause the thin clients to work fine except for Citrix ICA windows? The fonts do not appear?
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| 09:42 | <Gadi> mattwalston: what kind of thin client?
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| 09:42 | <mattwalston> Gadi: DevonIT LT210
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| 09:43 | <Gadi> ah - an 'el cheapo' ;)
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| 09:43 | <mattwalston> Gadi: I did add more ram to all the clients because it was available
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| 09:43 | Gadi: yeah... like $120 each
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| 09:43 | <Gadi> reduce the amount of video ram in the BIOS
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| 09:43 | to say, 16MB
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| 09:44 | <mattwalston> Gadi: ok... know it only affects the windows programs everything else works fine...
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| 09:44 | <Gadi> are you launching citrix from the Linux desktop?
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| 09:44 | <mattwalston> going to go test, brb
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| 09:44 | yeah
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| 09:44 | <Gadi> ok
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| 09:44 | <mattwalston> and from the ltsp server it works perfect
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| 09:44 | just the ltsp clients
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| 09:45 | <Gadi> yeah, go ahead and check the video ram settings in the BIOS
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| 09:52 | <mattwalston> negative no luck...
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| 09:53 | <Gadi> what video chip is in that thing?
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| 09:53 | <mattwalston> the scroll bar is black and purple and no text shows, sometimes you can highlight it and it shows text
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| 09:53 | via
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| 09:53 | <Gadi> LTSP 5?
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| 09:53 | <mattwalston> Gadi: yeah, with ubuntu
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| 09:53 | <Gadi> you can try different via drivers in the chroot
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| 09:54 | and see if that makes any difference
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| 09:54 | <mattwalston> Gadi: what about testing as vesa?
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| 09:54 | <Gadi> yeah, do that
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| 09:54 | that would tell you if it is a driver thing
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| 10:00 | <outofrang1> Is getting Pulse volume control working a lost cause?
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| 12:03 | <vagrantc> otavio: do you still have that ldm and ltsp upload?
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| 12:07 | <DawnLight> hello. are debian etch ltsp packages supported here?
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| 12:10 | <DawnLight> i used the client building script and pxe boot works as far as getting me to a display manager. what i don't understand is which display manager that is, and where is it running, on the server or on the client? the client has the ldm package installed. is this what i'm seeing?
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| 12:10 | <ogra_cmpc> DawnLight: yup
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| 12:11 | <DawnLight> ogra_cmpc: is it configured to connect to the server's X?
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| 12:11 | <ogra_cmpc> no, it uses ssh
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| 12:11 | (but executes an x session then indeed))
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| 12:12 | <vagrantc> LDM is basically a frontend to "ssh -X /etc/X11/Xsession"
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| 12:12 | <ogra_cmpc> hey vagrantc
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| 12:12 | merry christmas or so :)
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| 12:12 | <vagrantc> ogra_cmpc: hi
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| 12:12 | * vagrantc chooses "or so" | |
| 12:12 | <ogra_cmpc> heh, i thought so
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| 12:12 | <Gadi> this party just got a lot more active
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| 12:12 | * ogra_cmpc has a weird initramfs prob | |
| 12:12 | <vagrantc> well, i gotta head to work for a few hours ...
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| 12:13 | hopefully the party will continue on without me :)
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| 12:13 | <DawnLight> my problem is that it doesn't let me log in. it doesn't say anything, either
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| 12:13 | need i configure something in the server?
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| 12:13 | <vagrantc> DawnLight: you need openssh-server installed
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| 12:13 | and ...
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| 12:13 | <ogra_cmpc> vagrantc: did you ever see that binaries in /sbin cant be executed in initramfs ? (while all in /bin works fine)
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| 12:13 | <DawnLight> i have it installed but it has passwordauthentication off
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| 12:14 | <vagrantc> DawnLight: well, passwordauthentication is what LDM uses to log in
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| 12:14 | <ogra_cmpc> DawnLight: a proper desktop environment needs to be installed
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| 12:14 | <DawnLight> can i use keys?
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| 12:14 | <ogra_cmpc> no
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| 12:14 | <vagrantc> DawnLight: you also need x11-common, a window manager, and make sure /etc/X11/Xsesssion is executable
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| 12:14 | <ogra_cmpc> not yet at least
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| 12:14 | <DawnLight> i know how to use them. why can't i?
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| 12:14 | <vagrantc> well, not exactly true
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| 12:14 | you can use a key ...
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| 12:15 | <ogra_cmpc> vagrantc: with ldm2 ???
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| 12:15 | <vagrantc> passwordless
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| 12:15 | <ogra_cmpc> that will require a lot hacking i guess
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| 12:15 | <vagrantc> ogra_cmpc: if root's default keys are passwordless it will work
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| 12:15 | ogra_cmpc: i've tried it with botht he older ldm and the new one
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| 12:15 | <ogra_cmpc> ldm2 still waits for the passwword
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| 12:15 | <DawnLight> root? why root? does it ssh -X root@server?
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| 12:15 | <vagrantc> oh, right.
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| 12:15 | DawnLight: no, root on the thin client
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| 12:16 | <DawnLight> ah
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| 12:16 | <vagrantc> /opt/ltsp/i386's root
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| 12:16 | <ogra_cmpc> greeter and backend are more stictly separated in ldm2
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| 12:16 | <vagrantc> anyways... gotta run
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| 12:16 | maybe i just tried it on the older ldm...
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| 12:16 | which is what's in etch
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| 12:16 | <DawnLight> then i have a problem. i don't want to use passwordauthentication
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| 12:16 | <vagrantc> i'll drop in later
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| 12:16 | DawnLight: patches accepted.
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| 12:17 | * DawnLight shivers | |
| 12:17 | <DawnLight> can i use something other then ldm? such as a real display manager that runs on the client?
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| 12:19 | <ogra_cmpc> DawnLight: you can use SCREEN_07=startx and run gdm on trhe server with the cost of all security, sound and localdevice support
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| 12:19 | (startx will use XDMCP)
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| 12:21 | <DawnLight> ltsp-server package suggests the sdm package. will that be different?
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| 12:22 | <ogra_cmpc> it uses xmessage but does similar stuff to ldm
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| 12:23 | without localdev or sound integration (like gdm)
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| 12:23 | <DawnLight> so my best bet is to use passwordauthentication
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| 12:23 | <ogra_cmpc> sdm should be in teh chroot though, not on teh server ...
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| 12:23 | no idea why its a recommends there
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| 12:23 | are you on debian or ubuntu ?
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| 12:24 | <DawnLight> i'm trying to avoid passwordauthentication because of bad experience with brute forcing
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| 12:24 | debian
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| 12:24 | <ogra_cmpc> ah, k
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| 12:24 | then vagrant is your best friend :)
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| 12:24 | he maintains teh debian port
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| 12:24 | <DawnLight> he's the maintainer, or something
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| 12:24 | ah, precious
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| 12:25 | <ogra_cmpc> but since he changes stuff i cant help everywhere :)
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| 12:26 | <ogra_cmpc> DawnLight: i think i once added an option to use a different ssh port
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| 12:26 | you could run a dedicated ssh server and restrict it to the client network
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| 12:33 | <DawnLight> he left, tough. well, i think i'll see about this passwordauthentication problem
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| 12:33 | there is a serious security issue with having the root's key in the client
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| 12:34 | it would be making the server hand out it's root access
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| 12:35 | <ogra_cmpc> right, your best bet is either a dedicated ssh server with pw or sdm with keys ... i'm not sure whats needed for sdm to make stuff like sound or localdev work
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| 12:36 | <DawnLight> ogra_cmpc: i don't know how those work anyhow
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| 12:37 | <ogra_cmpc> usually out of teh box (in ubuntu at least) :)
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| 12:37 | <DawnLight> but how? care to explain?
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| 12:38 | network sound system?
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| 12:38 | and devices... phew, sounds complicated
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| 12:39 | if processes run on the server, how do they get access to the client's cdrom?
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| 12:39 | <ogra_cmpc> the ltsp-client-cor4e initscript starts a pulse server that listens on teh network ... ldm sets up a virtual alsa device during login in teh users session that uses that network socket
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| 12:41 | <otavio> vernier_: oh! I think I forgot them
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| 12:41 | ops
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| 12:41 | vernier_: sorry
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| 12:41 | vagrantc went out :(
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| 12:41 | <ogra_cmpc> localdevices are way more complicated as they need teh ssh sockeet ldm created and need to set a proper auth cookie (also created by ldm)
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| 12:46 | <DawnLight> so how secure is all this?
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| 12:46 | is everything ssh'd?
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| 12:48 | <ogra_cmpc> with ldm it is, yes
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| 12:57 | <DawnLight> ogra_cmpc: have any suggestions on the subject of securing against brute force?
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| 12:59 | <ogra_cmpc> yes, use a dedicated ssh server
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| 12:59 | <DawnLight> ogra_cmpc: i don't get it, sorry
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| 13:00 | <ogra_cmpc> run a ssh server on port 3000 or so with a restricted ip range ... have the clients on a separate network and make them use port 3000
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| 13:02 | all brute force attacks could only come from a thin client that way .... but there is no opportunity to even have a login on a client (at least in ubuntu the clients are 100% locked (no accounts, root locked))
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| 13:03 | <ogra_cmpc> it wont save you from brute force attcks but mimimize the risk significantly
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| 13:03 | <DawnLight> debian also that way
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| 17:24 | <vagrantc> DawnLight: did you get your issues worked out earlier?
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| 17:25 | otavio: hey there ... just wondering what the status of the ltsp/ldm uploads is...
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| 18:04 | <stgraber> ogra_cmpc: still aroud ?
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| 18:04 | s/aroud/around/
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| 18:19 | ogra_cmpc: mksquashfs seems to produce broken images here ...
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