#arpnetworks/ 2015-10-15,Thu

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WhoWhatWhen
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sorresseanI'm seconding the image list issue. Especially with the BSDS, you have to check against what is currently supported. If something isn't supported (9.1 I think is still supported) there's no point in sticking with 9.0 on the list. [12:35]
brycecDevil's Advocate: But what if a customer wants 9.0? Answer: Then they're the kind of customer that knows how to install it themselves. [12:41]
sorresseanYeah, if you have very specific requirements for 9.0 you should be able to install it. [12:41]
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mrsaint7. et-3-1-0.lax22.ip4.gtt.net 0.0% 18 174.8 175.4 174.7 182.0 1.8
8. ge0-arpnet.cust.lax07.mzima.net 58.8% 18 174.9 177.3 174.9 182.0 3.1
9. anycast-arp.mainstreamhosting.net 70.6% 18 173.3 173.4 173.3 173.6 0.1
whats up?
pl like crazy? :)
[15:30]
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mercutiogoddamnit
yes there is
[15:31]
mrsaintddos? [15:32]
mercutioyeh likely [15:32]
mrsaintok better upgrade internet :)
or have good ddos communities aka nullroute :)
[15:32]
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meingtslaStinking packet loss [15:34]
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mrsaintyeh havent had pl in my network last couple years
but on the other hand I got 20gb transit with 0.5 % usage :)
again :(
60% loss is amazing
[15:34]
BryceBotThat's what she said!! [15:37]
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[15:37]
mrsaintmy mobile go crazy with sms :) but hey its fun I watch tv soo its okey only 00.30 here :)
not any monitoring knowing destination easy that is attacked and can do nullroute? and provider null it and it goes away?
[15:38]
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mercutioit is null routed on some providers [15:43]
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mrsaintthis one give 65% pl ge0-arpnet.cust.lax07.mzima.net
still
[15:44]
mercutioyeh it's mzima that's broken [15:44]
mrsaintshutdown peer there then :) reroute over working route :) [15:45]
i hate it when my ii bot disconnects from irc when I get to many alerts quickly :)
PROBLEM anycast-arp.mainstreamhosting.net/CPU Load CRITICAL CHECK_NRPE: Socket timeout after 10 seconds. kinda like that one :)
[15:50]
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[16:07]
mrsaintis arp back online now? [16:08]
brycecNot dead? [16:08]
jbergstroemurghl i have issues too [16:08]
brycecBut my packets do seem to be lagged [16:09]
mrsaintIll shutdown my anycasting until I wake up as I have a huge campain going and would be not to good if it cant reach the web :)
I got 77% loss on the mzima.net route in still
[16:09]
vom513im on twc rr in ohio - v4 path is rr->level3->giglinx (??)->arp [16:09]
jbergstroemi freaked out and assumed hardware [16:09]
vom513im seeing tons of pl [16:09]
brycecGuess this explains why my vpn can't reconnect. I just figured it was an El Capitain bug as I just rebooted from that upgrade. [16:09]
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mrsaintmy level3 route. is like 60-70% loss too.. its huge.. seems to be major ddos [16:10]
vom513this dude 4.68.111.17 looks crushed [16:10]
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vom513:( [16:10]
brycecsmokeping has lost its mind, it's hilarious to see the sudden spike [16:11]
vom513i whipped up a ghetto perl monitoring script this past weekend - this is it's first real test (its actually working as desired...) [16:11]
mrsainthttp://smokeping.mainstreamhosting.net/smokeping/smokeping.cgi?target=network.anycast-arp.normal this is from london. :) [16:12]
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mrsaintnagios is a good monitoring tool :) [16:14]
brycechttps://smokeping.cobryce.com/?target=ARP.ARPWebsite this is from 5 different networks (but served from ARP) :p
Thanks up_the_irons https://twitter.com/arpnetworks/status/654797205249757185
[16:16]
BryceBotTWITTER: We're experiencing a large DDoS attack in our Los Angeles data center. Sorry for the lost packets, we're working on it. (Thu Oct 15 23:13:13 +0000 2015) [16:17]
up_the_ironsbrycec: believe it or not, some people still order really old versions because they have legacy apps they claim won't run on newer stuff [16:17]
mrsaintany idea if arp might be interested in other locations. Like in europe? [16:18]
brycecup_the_irons: I still regard it as essentially irresponsible to include unmaintained releases. Besides it's clear that they can install whatever else they need if they're one of those special people. [16:18]
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brycec(That is of course just an opinion, and you're free to go about your life as you wish) [16:19]
up_the_ironsmrsaint: I'm working on a location in Germany
brycec: to each his own :)
[16:19]
mrsaintup_the_irons: I have hosting germany netherlands and uk and good really good in .se I can offer good pricing. [16:20]
brycecup_the_irons: (In case you missed it in the scrollback, I'm not against the images existing, or their ISO's. Just trying to clean up the signup form because wow that list just kept on going and going and going)
I'm definitely happy to see that IPv6 traffic isn't affected nearly as bad as IPv4 in this ddos
[16:22]
mrsainttobad 0.00001% use ipv6 :( [16:24]
brycec>50% of my daily traffic is ipv6 [16:25]
mrsaintdamn
less then 1% of my 4gb used bw is ipv6 :)
[16:29]
up_the_ironsbrycec: I saw it. People order the old versions, so... [16:33]
brycecbrycec shakes his head in those peoples' directions [16:36]
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[16:36]
mrsainttime to get some sleep. up in 6h to work :) Good luck with the ddos guys [16:41]
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[17:05]
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bmacsIs the DDoS still going on? [17:33]
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mercutiothere's some mitigation
most routes are fine now
[17:34]
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[17:34]
mercutioat the same time freenode's been having ddos attacks it seems [17:35]
bmacsso you are saying rackspace is behind this? ;)
Is the target ARP? or is it one of the hsoted clients?
[17:35]
sorresseanlets blame rackspace for everything.
most notably suckage.
also I don't know if it was network side or server side, but I'm getting some insane server lag.
[17:36]
mercutioheh
can't really talk about targets.
sorressean: on what host?
[17:36]
sorresseanmercutio: arpnetworks dedicated [17:37]
mercutiooh
probably network then
it's still happening?
[17:37]
sorresseanI presume if anything was making the box lag that hard it would'/ve had higher load averages, top showed nothing and no swap usage. [17:38]
mercutioit's quite recently it got better [17:38]
sorresseanmercutio: seems to be slightly better. it's spiking now. [17:38]
mercutiomaybe a separate issue but if you're seeing loss and high ping spikeyness near the arp network then send in support ticket with traces in both directions [17:40]
sorresseanhrm. will do [17:40]
mercutioi think the ddos has actually stopped now [17:41]
sorresseanOh, was there an attack on the network? [17:41]
brycecWas Linode hit too? I'm trying to hit a site that has two VPS at Linode serving their authoritative DNS and connections are just timing out, confirmed from several other home ISPs. And a third site with DNS from name.com isn't resolving either. [17:41]
sorresseanI just recently joined IRC after a server reboot.
brycec: I was just using my linode vps. seems okay.
[17:41]
mercutiocould have been, i hvae no idea :) [17:41]
brycecsorressean: so strange
thanks
[17:42]
sorresseanI know freenode was under for a while as well. [17:42]
mercutiobryce along with these freenode dos's. [17:42]
brycecFirst the ddos and then a bunch of different DNS servers appear broken, I start getting suspicious. [17:42]
sorresseanI can't confirm on their DNS though. not using their dns for anything. may have been attack directly at their DNS systems. [17:42]
brycec(To be clear, these aren't "Linode DNS" or whatever, but actual VPS at Linode running BIND) [17:43]
sorresseanah gotcha.
my system is in dallas if that helps.
[17:43]
brycecI've poked those servers' owners, but wondered if there was something more widespread happening, or if this is just an unfortunate coincidence.
But in other exciting news, I received my OpenBSD 5.8 sets today :)
[17:43]
sorresseanbrycec: that's only exciting if it's FreeBSD! ;) [17:44]
brycecWhy would you be excited for FreeBSD 5.8??
Does FreeBSD sell CD/DVD sets any more?
[17:44]
mercutioopenbsd 5.8 [17:49]
brycecmercutio: yes. [17:49]
mercutiooh right
was reading bottom to top :)
[17:49]
bryceclolol [17:49]
mercutiobloody ddos attacks. [17:49]
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mercutiofor some reason they never really evolved though [17:50]
sorresseanYour current account balance is $8.796585458091763898.
Love tarsnap.
[17:53]
mercutiohaha [18:02]
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sorresseanhttp://www.nytimes.com/2015/10/16/technology/ultradns-server-problem-pulls-down-websites-including-netflix-for-90-minutes.html?_r=0 [18:55]
brycecthanks sorressean
Friend's blog is still down though :( blog.anthrobsd.net
the nameservers simply don't seem to have any records besides an SOA for his domain
[18:56]
sorresseanAlso arpnetworks tweated about DDOS issues
brycec: any idea what provider?
[18:57]
brycecwhois data says name.com [18:58]
sorresseanI have a domain hosted with them. seems to be fine from my end. (bscbstudentsofma.org) [18:59]
brycecthansk for checking
*thanks
friend says he hasn't touched anything but hasn't looked into further.
And I decided not to care about it more than he does.
[19:00]
sorresseanheh, those are great facedesk moments. [19:03]
brycecAnd to move on to my next problem. Firewall can hit an address, but a system behind the firewall (not router, no nat, just a transparent bridging firewall) gets "no route to host" for no apparent reason :)
If it's not one thing, it's another.
[19:04]
sorresseansounds like my day.
I've never spent so much time in ssh.
[19:05]
chrismsnzsorressean: i've been trying to get office 2k13 to activate all day
i'd rather be network troubleshootin'
:P
[19:06]
sorresseanalso I never thought I'd curse so much about perl.
It wasn't as fun as network troubleshooting.
[19:06]
brycecbrycec does a headless OpenBSD upgrade for a pick-me-up [19:06]
sorresseansomewhere somehow spamassassin and perl and amavisd-new broke. but recompililing, even if you get all dependencies didn't matter, so it was a matter of grabbing random perl libraries that were missing, recompiling and then running again tos ee what was broken still.
to see*
[19:07]
brycecOkay... so this host can ping host X, but curl bombs out immediately with "No route to host". lolwut [19:15]
sorresseanping wouldn't update routing tables would it? [19:16]
mercutiothat can be firewalling
if it returns icmp-unreachable
[19:16]
brycecthanks mercutio
I forgot this box has its own pf.conf that limits outgoing traffic
brycec sends mercutio a cookie
[19:16]
mercutiothe modern trend seems to be to just drop traffic.. [19:17]
brycec(This is why I'm trying to consolidate firewalls too)
OpenBSD 5.8 (GENERIC.MP) #723: Wed Aug 5 00:21:20 MDT 2015
w00t
[19:17]
sorresseanyour cookie did not arrive. It was blocked by pf.conf [19:20]
brycecI didn't send it to you, sorressean :P [19:20]
sorresseanwell, mercutio 's cookie didn't arrive!
it was blocked by *his* pf.conf!
[19:20]
mercutioheh
it feels so weird to have such an early release
[19:21]
brycecI'm just excited to have it before the release date [19:22]
mercutioheh [19:22]
brycec(this is the first time I've actually bought a set. and a shirt.) [19:22]
mercutioi'm waiting for the release date. [19:22]
brycecI'm 90% done with my first upgrade [19:23]
mercutioare you upgrading to 5.8-stable? [19:23]
brycecAnd as an admin of the preeminent (if I do say so myself) OpenBSD shell host, I plan to have it upgraded before release date too
Si.
[19:23]
mercutiooh wow i thought you didn't do updates there. [19:23]
brycec? [19:24]
mercutiowell not very often i meant
damnit i've forgotten the name of it now :)
[19:24]
brycecOn devio.us? We're running 5.7 now :p [19:24]
mercutiooh
it was a couple of versions behind before wasn't it
[19:24]
brycecSorta, we've had a checkered history [19:24]
sorresseanbrycec: I knew I recognized the name, didn't realize you worked on devious. [19:24]
brycecRan 4.7 for the longest time (until around 5.5 or so) due to technical issues
er, 4.9 crept in there too
[19:25]
mercutiois it down atm? [19:25]
sorresseanI got an account, but I haven't found anything fun to do with it yet. just made sure a package compiled on BSD. [19:25]
BryceBotThat's what she said!! [19:25]
sorresseanmercutio: nope, it's up. [19:25]
brycecuntil we were running 5.4, and were "stuck" on that until we had a remote KVM to ensure the time_t upgrade went smooth [19:25]
sorresseanOpenBSD wolfman.devio.us 5.7 GENERIC.MP#3 i386 [19:25]
mercutioi'm not getting dns [19:26]
brycecmercutio: our DNS is hosed-ish, I mentioned it earlier in #arpnetworks (Linode) [19:26]
mercutiooh
right
dns is down completely :)
what's the ip?
[19:26]
brycecYeah :( 2001:470:4:2a5::feed:dead [19:26]
mercutioipv4 [19:26]
brycec98.142.108.75
Was going to say "I have no idea" but remembered I have open ssh connections to it
[19:27]
mercutioit's in motd too it seems
bitrig?
[19:27]
brycec(Our DNS isn't setup in the most optimal way right now... mainly because I don't admin it, and what's setup right now was meant to be temporary.)
Congrats mercutio you're the 3rd person ever to see that gag
[and say something about it]
[19:27]
mercutiooh it's not really? :)
i see :)
[19:28]
brycecIt's OpenBSD, really
It was an April Fools joke
[19:28]
mercutiowell bitrig is openbsd too
6 months later...
[19:28]
brycecNot enough people laughed yet. [19:29]
mercutioheh [19:29]
brycecAnd only in the sense that OpenBSD is NetBSD :P [19:29]
mercutioinvalid system call
gah
[19:29]
sorresseanbrycec: I just connected via dns.
I think. one sec
[19:29]
brycecsorressean: you must have it cached, because ns1.devio.us and ns2.devio.us don't respond [19:29]
mercutioi wish openbsd would keep supporting older binaries :) [19:29]
brycec@tdr [19:30]
BryceBotTheo de Raadt says: "thisistheone8888" is someone who throws out uneducated thoughts without any practice. Oh wait, this is misc. I forgot. [19:30]
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brycecI'm sure Theo's said something about "Fuck backwards compat" [19:30]
sorresseanmaybe it's propigating now or something. for whatever reason I can ping it from my linode, never connected from linode. well, if I did it was months ago. [19:30]
brycechm maybe Linode is filtering 53/udp to the Internet [19:31]
mercutiomajor lag
it was all good earlier
[19:31]
brycecWell it is a busy box... [19:32]
mercutiowell it looks like he.net being lame [19:32]
sorresseanI am curious, what is the general use case? I doubt really heavy development can go on there. [19:32]
mercutioshells were all the rage in the 90s.
i had one :)
[19:33]
brycecmercutio++
email, text web browsing, code dev, testing connectivity
Also IRC bouncers, but we frown on that
[19:33]
sorresseanwell, if you frown at me I can say I didn't see it! [19:34]
mercutioheh i got ddos'ed when irc bouncing years back
but i suppose that's what you get for logging in to efnet
someone wanted my nick
[19:34]
brycecsorressean: just to clarify, dig devio.us @173.230.139.107 works for you?
or @74.207.236.79 ?
(from your Linode VPS)
[19:35]
sorresseanno, it doesn't. maybe it's cached at Linode's DNS servers. [19:37]
mercutioi can reach .108 but not .107 [19:37]
brycecMust be it I guess. [19:37]
mercutiohangon
i can reach both now
[19:37]
sorresseanyeah. sorry for the false hope there...
I know it's not cached on my specific instance, but it's probably cached on their DNS.
[19:37]
mercutioi still can't dig though [19:37]
brycecsorressean: no worries, just wanted to be sure before I told the guy whose dns servers they are something false
He must be rebooting .107 right now
woo, dns is back
[19:37]
mercutiosame here [19:41]
bmacsDo we have any stats on how large this DDoS was, traffic wise? [19:42]
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sorresseanMeh. OVH spam/support is seriously shitty, but I have to give them props for doing cool stuff with energy usage. [20:04]
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mercutiomercutio found bryce's talk [20:29]
brycec..was it hard to find? [20:33]
mercutionope
at least once dns was working :)
i really want something like php-fpm that can just listen on heaps of sockets and start php if necessary for a user.
and then leave a pool running for more common sites, and just start as needed for less common
[20:34]
brycec$OneOfTheseDays I'll write something just for us [20:35]
mercutiooh i want a general solution
because php startup cost is really high
[20:35]
brycecwell, I'll open-source it and stuff [20:36]
mercutioof course i'd rather php just had a cheaper startup cost.
but for shared web hosting in general it'd be great.
[20:36]
brycecYou're talking to someone that oversees a system that calls php-cgi hundreds of times a minute, trust me, I know :P
*php-fastcgi
[20:36]
mercutioheh
it's one of those glaring problems
that would require considerable effort to fix.
of course one way to look at it is "ram is cheap"
but you still get process table bloating
and php caches don't work when you run as cgi
also this talk has good audio
i'm so used to talks that you can hardly make out what people are saying
[20:37]
brycecWe see the load mostly on disk IO load (but that may have something to do with what our users are doing)
WOULD YOU LIKE ME TO TALK LOUDER? :p
[20:39]
mercutioyou talk loud enough
all the disk i/o should be cached
that may just be from not having enough ram for reads.
[20:40]
brycecOr their stuff is loading various random stuff
Fun fact: we don't have 100GB of RAM to cache all of /home :P
[20:40]
mercutioheh
i dunno
[20:41]
brycecWe have *drumroll* 2GB. [20:41]
mercutioif i was specing hardware i would have gone with at least 24gb of ram :)
yeh i know
ram is cheap, but that'll be ddr1 :/
[20:41]
brycecNah we're ddr2
pretty sure
[20:41]
mercutiooh real [20:41]
brycecnow I'm not so sure... [20:41]
mercutioi doubt it's ddr2 [20:42]
brycecWhatever, cheaper than ram is "free hardware" [20:42]
mercutioheh
true, you could probably get something better donated now days
but shifting around and stuff
[20:42]
brycecWe're actually working on getting another box up
but it's having hardware issues apparently
[20:43]
mercutioahh
do you get much rack space?
[20:43]
brycecAs I recall, it has 24GB or so
I have no idea
[20:43]
mercutiooh ok [20:43]
brycecI don't know much beyond what sudo grants me :p [20:43]
mercutioahh
but yeah i still get surprised by how well openbsd runs on old hardware
it never used to seem that amazing performance wise
it just hasn't got that much slower over time
[20:44]
bryceclol [20:44]
mercutiogenerating keys for ssh is slow on old hw [20:45]
mjp_ill generate some for you if you like :) [20:46]
mercutiohmm there's al ong video on network performance on freebsd there too [20:51]
brycecThat was a good talk [20:51]
mercutiomaybe that'll tell me how linux compares to freebsd network wise [20:51]
brycecIt won't. [20:52]
mercutiooh ok
thanks :)
it should still be interesting :)
[20:52]
brycecIt will describe ways of bettering network metrics and improving network performance on FreeBSD
as memory serves
[20:52]
mercutioyeah i think i'll leave that for later :)
oh yeh
i just bought 3 dual port 10 gigabit ethernet cards
for US $50 :)
total
yay for ebay and make best offer :)
[20:56]
brycechot damn
Congrats
[20:58]
mercutiothey're untested
but i bought one like that for $20 untested before and it was fine
[21:00]
brycecGL
*Good luck
What sort?
[21:00]
mercutiothere's no driver on openbsd
mellanox connectx
they generate a lot of interrupts, but are fine performance wise
[21:00]
brycecbrycec considers whether he should be upgrading his ancient crappy GbE home network :p
Cool
[21:00]
mercutioby a lot i mean i was doing 150k+
before i played with coalescing
[21:01]
brycec(there's been some recent list traffic about 10GbE cards) [21:01]
mercutioyeah i want to try writing a driver for openbsd
but it's way down the list :)
s/writing/porting/
[21:01]
BryceBot<mercutio> yeah i want to try porting a driver for openbsd [21:01]
mercutioi got a box of sfp+ direct attach cables before
so now i have heaps of cables, so i thought i needed some more cards :)
[21:01]
bryceclol [21:02]
mercutioyou can get 1x the single port card for like $16 or something
and the make offer was selling for $175
http://www.ebay.com/itm/121605173632?_trksid=p2057872.m2748.l2649&ssPageName=STRK%3AMEBIDX%3AIT
[21:04]
brycecWell man good luck with those, hope they work out for ya. $50 isn't bad for a gamble. [21:05]
mercutioyeah i suspect they just have no way to test
and dual port cards for back to back is just so much more convenient
ebay seems flooded with them
[21:05]
........... (idle for 52mn)
***bmacs has quit IRC (Quit: bmacs) [21:58]
...... (idle for 28mn)
sorresseanmy only dive into kernel code was trying to patch up a screen reader for Linux that ran fully in the kernel.
It was... less than fun. Mostly because screen readers don't belong in the kernel.
[22:26]
mike-burnsSounds like a thing Linux would do. [22:27]
sorresseanThere was not even an attempt at decoupling. It's just fully there. [22:27]
...... (idle for 26mn)
mercutiois it still in the kernel?
i remember people getting excited about tux
[22:53]
BryceBotThat's what she said!! [22:53]
mercutiothe in kernel web server
and i'm like uhh
i would like to see more kernel level stuff for medium level type stuff
like receive file and output straight to disk
you can send file, but not receive file
but normal coalescing could help there too. downloading using dsl or such with low speed and no coalescing is a bit of an unnecessary burden
[22:53]
mrsaintddos gone now? [23:01]
brycecSupposed to be, yep [23:09]
mercutioyeah it's the nastiest ddos i've seen on arp ever.
it was
[23:17]
mrsaintyeah.. found the destination also I guess? some specific target ?
as it used to be..
[23:26]
mercutioyeah weirdly it always seems to be
sometimes you hear about people attacking dns servers and so forth of providers afterwards.
but for the vast majority of cases it's one user.
for residential users it's usually people playing call of duty and mouthing off or such
[23:26]
mrsaintyeah its boring.. [23:28]
mercutiosuch is life :)
i think it was lithuania that once had huge coordinated attack on banking system
but most attacks are more to annoy than orderly.
[23:33]
mrsaintits easy for a client to configure ntpd wrong and you get ddos due to those aswell.. Its not easy to keep everything secure either. [23:38]
.... (idle for 18mn)
mercutioit's hard to configure openntpd wrong [23:56]

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