#arpnetworks 2010-10-26,Tue

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WhoWhatWhen
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bharatakgreets, is running ntp recommended on the vps? or does the host take care of that? [06:15]
mike-burnsRun your own NTP. [06:17]
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bharatakwill do [06:50]
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wwbharatak: i use these good west coast servers in my ntp config:
http://pastebin.ca/1973687
[07:20]
bharataki'm just using the pool, shouldnt that magically figure out good servers? [07:21]
wwit should be good enough...
but won't find servers that are close by...
probably doesn't matter much though
[07:21]
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cpetdo you have any issues with stuff being screened ? [08:44]
bharatakcpet, you mean a firewall before your vps?
seems open to me
[08:57]
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toddfcpet: the only firewall settings infront of a vps is rate limiting ssh connections to your vps; most people don't notice, but attackers do [09:39]
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wwww hasn't noticed... but then hasn't tried to scp a large file into the vps...
do you rate limit SYN packets or everything?
[10:02]
mike-burnsIt's not size, it's number of times. [10:02]
wwaha. makes sense [10:03]
toothre: ntp. I just use the pool. I don't need it any more accurate than that really (sure it's fun to figure out which one is the closest/best) [10:11]
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dxtrtoddf: That's already applied? So my PF rules are for nothing? :P [11:24]
toothdepends on your PF rules [11:25]
dxtrTrue [11:25]
jdoedon't listen to him.
be an asshole and only, ONLY use stratum 1 servers.
bonus points if it's a restricted one and you haven't given them a heads-up.
[11:32]
jpalmerheh [11:33]
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cpetscreen as in "screen irssi"
not a firewall
was supposed to be a trick question :)
[11:52]
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bharataktmux irssi ;) [12:14]
mike-burnstmux weechat [12:15]
toothwow. weechat looks neat
I'm pretty happy with irssi though
[12:20]
mike-burnsI'm prety happy with screen instead of tmux, but I am a big fan of weechat.
I start new people on tmux and weechat, since those are actively developed projects.
[12:20]
jpalmerirssi isn't actively developed? [12:20]
toothis there something that tmux does that screen doesn't ? or is it just different
oh, hah. the FAQ goes right into that.
[12:20]
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[12:20]
toothah, just a different way. (generalized comment) [12:22]
dxtrmike-burns: Are there OTR and/or fish stuff for weechat? [12:25]
mike-burnsNo idea. [12:25]
dxtrThat's kind of important for me :P [12:28]
mike-burnshttp://wiki.flashtux.org/wiki/WeeChat/irc-otr
http://www.weechat.org/files/scripts/weefish.rb
[12:31]
toothohyeah. bitlbee works with it, /obviously/ [12:33]
jdoemike-burns: the flip side of that is how active does screen/tmux or irc client development really need to be?
irssi only has one bug that bites me, and it's relatively rare.
[12:35]
toothyeah. irssi is mature now, it shouldn't constant updates.
+require
[12:36]
mike-burnsIt should be updated to be more convenient. [12:36]
jdoeI get that openbsd wants tmux because it's !gnu, but the only draw for me on weechat is the sidebar.
and I'm not content to give up stability for that ;)
I guess. Convenient how?
[12:36]
toothsidebars are for people that can't remember what channels they
're in.
[12:37]
vcstooth: i would like to see you try when you are on 20 different networks
lol
[12:37]
mike-burnsFor example, weechat updates have things like that bar showing where you stopped reading. [12:37]
toothI fully understand that my solution is a solution for me only, which is to cutdown on networks if I can't remember them. [12:38]
jpalmervcs: I use irssi on multiple networks. I see which server and channel I'm in, for each window. [12:38]
toothmike-burns, irssi has a trackbar. [12:38]
vcsjpalmer: its hard to remember where to switch to
in a timely manner
clients like irssi do not scale well
[12:38]
toothno, they don't [12:39]
jpalmervcs: /window list doesn't work for you? [12:39]
toothi've heard crazy people exist which maintain upwards of 40 channels with irssi [12:39]
vcshaha
im not insane
irssi was great for < 10 channels
but i no longer wish to subject myself to that
[12:39]
mike-burnsweechat also has split screens. [12:40]
vcsbeing on tons of networks / channels [12:40]
jpalmer*shrug* to each his own, I guess. I use irssi for well over 10 channel. not quite 40. and have *no* problems with it. [12:40]
mike-burnsirssi isn't bad. [12:40]
vcsirssi is great, i just think it does not have what it takes
to scale well
[12:40]
toothit can handle it. just not as gracefully [12:41]
vcsthis is one of the few times where i prefer GUI over cli [12:41]
toothreally, not a problem for most people
I actually like not having any sidebars.
[12:41]
jdoetooth: or want a userlist without /names
haha.
[12:42]
vcsalso, i dont miss the ocasional lag i get running it remotely
xchat is nice, no bloat, and everything i want
[12:42]
toothyeah. i don't that. [12:43]
vcshas python, perl, and tcl [12:43]
jdoesplit screens would be nice, although I wonder if it works as badly as screen's split screen sdo. [12:43]
vcsirssi only has perl /me cringes [12:43]
toothI figure if there are more people than can be shown on the side without scrolling, than I'm not going to care anyway [12:43]
jdoescreen's vertical splitting sucks :/ [12:43]
vcsscreen sucks in general
i rather use multiple logins
[12:43]
mike-burnsweechat has Ruby, Python, and a few other languages I know. [12:44]
vcsweechat is good [12:45]
jdoevcs: to each their own. I'd rather have one local window open per remote host. [12:47]
vcsjdoe: so would i until i have to break out screens highly unintuitive scrollback buffer [12:47]
toothyeah on that note, i'm glad multiple options exist. [12:48]
vcsTabbed terminals
is what i like
keeps it in one window
but gives me the option of moving them around on the fly
not at the mercy of doing man screen
[12:48]
jdoetooth: NO, MY WAY IS THE BEST WAY. [12:52]
toothtooth sits corrected. [12:54]
mike-burnsMultiple options is perfect. [12:58]
toothanyway. the little detail that sold me on irssi, was that I was able to configure my date/time format to be different in the window than what is logged to disk. [12:59]
mike-burnsHeh.
The thing that sold me on weechat was splits and things like Alt-a and Alt-u, plus Ctrl-r.
[13:00]
tooththis was, of course, many years ago now. [13:01]
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Tadakadoes anyone have any gotchas to be aware of when reinstalling the OS on a VPS via console? getting ready to blow mine away soon. [13:30]
nestaTadaka: what OS? [13:30]
Tadakagoing to move from ubuntu to freebsd8.1 [13:31]
nestaah very good. well just follow the HandBook
:)
[13:32]
Tadakaok, that's all I was wondering. :) [13:32]
toothopenbsd is the only gotcha, isn't it ? [13:32]
nestait's pretty straight forward
tooth: OpenBSD has it's issues :P
[13:32]
Tadakajust wanted to be ready for any possible surprises. [13:32]
nestaFreeBSD is, generally, pretty smooth going. [13:33]
TadakaI've done freebsd a number of times, but this will be the first install on arpnetworks [13:33]
mike-burnsARPnetworks was basically made for FreeBSD. [13:33]
Tadakagotta love that
I decided to give jaunty a try when I ordered my vps and regretted it almost immediately
[13:33]
mike-burnsCommon reaction. [13:34]
Tadakaheh
just need the iso added to my system and Ill get that nasty ubuntu system off your network. :P
thanks for the confirmation folks
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dxtr2141 < tooth> i've heard crazy people exist which maintain upwards of 40 channels with irssi <- I'm one of those :) [13:57]
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jdoemike-burns: I'm curious, how are vertical splits with wee-chat? they're super slow in screen, but I assumed that's because terminals aren't really optimized for scrolling half the screen up :/ [14:06]
RandalSchwartzRandalSchwartz waves
(from near the LHC!)
[14:13]
jazz57LHC! That's fantastic. [14:14]
toothJust down the street from me.
(on a galactic scale, anyway)
[14:14]
RandalSchwartzwell - literaelly only a few miles from me right now
toured it yesterday and today
[14:15]
toothCOOL [14:16]
RandalSchwartzwould have gotten to go into the tube, but the experiment is live
so no chace
chance
[14:16]
toothawww. so close. [14:16]
jazz57Wouldn't want a magnet quench while you're down there. [14:17]
dxtrRandalSchwartz: LHC is a local hockey club here :D [14:19]
jazz57So it's not *the* LHC [14:20]
RandalSchwartzheh. it's *the* LHC for most of the world [14:21]
jazz57I guess it depends on whether you're into sports or particle physics.
Has anyone figured out how to get the jitter down on NTP? No matter what I try it's always around 20ms.
[14:23]
wwjazz57: jitter: 0.011383 s [14:27]
jazz57On my Xen VPS jitter is less than 1ms.
I'm not sure if that's b/c of Xen or the OS.
ww: Is that on FreeBSD?
[14:27]
wwjazz57: yes [14:31]
jazz57That's a little better than what I'm getting. Any special configs?
I think Xen has a virtualized clock.
[14:31]
wwjust a hand-picked set of peers http://pastebin.ca/1973687
ww is surprised ntp is such a popular topic on #arpnetworks these days
[14:34]
jpalmerww: same [14:35]
jazz57I'm kind of a time nut.
I used to run a FreeBSD box with a GPS attached to the serial port.
Worked amazingly well with just a cheap automotive unit too.
[14:35]
wwi guess it wouldn't be the worst idea for arp to put up a couple of ntp servers for local use... keep the load off of the stratum 1s [14:37]
jpalmerif anyone at arp is using stratum 1's, they should be shot. [14:38]
jazz57I doubt that would fix the jitter problem though. [14:38]
jpalmerwell, except for specific reasons ;) and with consent. [14:38]
jazz57Some servers are listed as public, go ahead and use, no notify necessary [14:38]
wwjpalmer: everything in that list is a part of the ntp.org pool and open access [14:39]
jpalmersure. but, unless you have a specific need for your time to be *that* dead-on, stratum 2 or stratum 3 are prefereable. leave the stratum 1's for those who actually *need* it. [14:39]
wwwhen i made the list, i looked for hosts that were close in terms of network topology [14:40]
jpalmerww: well, pool.ntp.org is a special case. if there are stratum 1's in there, great. I meant more about people specifically hunting stratum 1 peers [14:40]
ww... didn't actually pay attention to stratum.
... they all happen to be 1 though
[14:40]
toothI just set mine to us.pool. [14:42]
jazz57ww: Are your round trip times longer than your pings?
Err, I mean jitter.
[14:42]
wwbut i agree in general... that's why it would be nice to have a local ntp server or two... [14:42]
jpalmerjpalmer is perfectly happy with {0,1,2,3}.pool.ntp.org [14:42]
wwi'd happily open up river.styx.org if there were interest [14:43]
toothcute domain name [14:43]
jazz57I would love to see a local GPS clock, though I think there is something limiting the precision in our setup. [14:43]
toothdoes charon@styx.org exist? [14:43]
wwcharon.styx.org used to [14:44]
jpalmerww: jazz57 GPS clock is no more accurate than pool.ntp.org. the only place where GPS timing makes more sense, is when there is no internet connectivity for a remote site. [14:44]
wwon rtt, ping with ~600 byte packets are about the same as jitter [14:45]
jpalmerwell, i won't say "no more accurate" but not substantially more accurate. [14:45]
jazz57If it was on the local net, the delay and jitter would be much lower. When I ran my GPS server on the LAN, my other server immediately improved its performance.
But there must be something about the FreeBSD/ARP setup that is introducing quite a bit of jitter.
My Xen setup is an oder of magnitude more accurate for some reason.
[14:45]
wwstability: 0.000 ppm [14:50]
jazz57I've got the same, but my best peer shows a jitter of 15 ms, whereas on Xen it's 0.056ms. Amazing. [14:51]
jdoeRandalSchwartz: you should go into the tube anyway. Statistically, I'm sure you'll be fine...
jazz57: if you're using the ntp pool, don't worry about it. Your client will kick out useless peers.
[14:52]
jazz57jdoe: Problem is not the peer, though. They're *all* around 15-20ms.
I mean, that's not bad...I don't really *need* any more accuracy. I'm just wondering why its relatively higher.
Seems more a Windows box than Unix. ;-)
[14:53]
wwcould be difference you see with xen is hypervisor vs. emulator/
?
[14:55]
jazz57ww: That what I'm thinking.
I just wish someone knew what was going on. More of a curiosity than a need. I think the pll loop will stay synched up to about 128ms, so no worries.
[14:55]
mike-burnsjdoe: I've noticed no speed issues with vertical splits in weechat. [14:57]
jdoehmm... maybe I'll give it another shot. To clarify I mean text scrolling speed not... I dunno, general app speed :) [14:59]
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nuke-evening
cana nyone help me out on this - > znc.cpp:2069: fatal error: error writing to /tmp/ccc771ui.s: No space left on device
[15:00]
mike-burnsI just make a vertical split to try iy.
t
There is a tiny bit of lag.
But it's hard to say if it's because of the split.
Oh when I un-fullscreened my window the lag disappeared.
[15:01]
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nuke-mike-burns can u give me hand? [15:06]
dxtrnuke-: read the error message? [15:09]
nuke-yes but i cant dump /tmp can i?
earse/dump
[15:10]
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nuke-dxtr? [15:17]
dxtrUhm, you're out of space on /tmp. You'll have to make it larger. [15:18]
nuke-but i never got this before, theres no way of dumping it?
or erase whats there?
cause its /tmp seems empty
[15:19]
dxtrdf -h
Or du -hs /tmp
[15:20]
nuke-first gives me this
Filesystem Size Used Avail Use% Mounted on
tmpfs 124M 0 124M 0% /lib/init/rw
udev 10M 572K 9.5M 6% /dev
tmpfs 124M 0 124M 0% /dev/shm
overflow 1.0M 0 1.0M 0% /tmp
second this
du -hs /tmp
[15:21]
dxtrerr [15:22]
nuke-0 /tmp [15:22]
dxtrYour /tmp is 1MB big [15:23]
jdoemike-burns: yeah... that's what I was expecting. My understanding is it's not a screen/weechat/whatever-specific issue, the terminal has shortcuts for scrolling the entire window, just not parts of it. [15:23]
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richardqhello garry [15:54]
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toddffor you time nazzi's .. until vmt(4) or a similar driver exists for kvm guests, where the guest can sync its time with the host, and the host uses accurate ntp timing, running ntp on a kvm system is only going to get you so much accuracy .. ;-) [16:05]
dxtrtoddf: One of the things I like with kvm is that the guests can set their own time
I had another VPS on some-popular-virtualization-technology-I-don't-remember-the-name-of that didn't let me set the time
And the host was so horribly out of sync it was disgusting
[16:15]
toddfdxtr: it is not virtualization if you don't have root and can set your time
there are some sites which claim to be virtualization but infact are glorified chroot() env's
[16:22]
dxtrtoddf: It's really popular among vps companies [16:23]
toddfit would be popular to run something that doesn't require resources of a true vps
i.e. it's more efficient and cost effective if you want to run linux ..
most of us here don't
[16:23]
dxtrOpenVZ!
That's it
"It is similar to FreeBSD Jails and Solaris Zones."
Bleh
[16:24]
toddflike I said, glorified chroot [16:25]
dxtrYeah
Didn't know that :P
I just knew it ucks
sucks*
[16:26]
jdoetoddf: I was going to say, it's largely a moot point... if you're that sensitive to jitter you shouldn't be on a vps :P [16:32]
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bharatak/// [18:04]
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finkRandalSchwartz: what DNS server do you use?
up_the_irons: you had recommended a DNS server months ago, you said it was the hottest new thing?
[20:17]
jpalmerfink: for backup, or hosting your own zone? or a recursive server? [20:19]
finkhosting [20:19]
jpalmer(ie, what are you looking to do)
ok, dns.he.net free, and solid.
[20:19]
finkthanks [20:20]
jpalmersure
btw: it'll also work as a slave, if you want to run your own DNS master.
[20:20]
finkjpalmer: atm i'm using tinydns [20:29]
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jpalmernever used it. if it does BIND style zone transfers, he.net servers should be able to slave the zone. [20:51]
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