#linuxcnc-devel Logs

May 22 2017

08:31 AM skunkworks_: finally had a reason to use screen.. Why wasn't I using that before? Huh?
10:02 AM seb_kuzminsky: skunkworks_: screen is great :-)
10:27 AM jepler: I hear the kids these days prefer tmux, but I've never given it a shake
11:16 AM seb_kuzminsky: bah humbug
11:47 AM jepler: seb_kuzminsky: the other day you said "boyajian's star is dimming again, right on schedule", were you just being comical or is there an apparent periodicity to the dimming?
11:53 AM seb_kuzminsky: http://www.wherestheflux.com/single-post/2016/06/09/What-will-happen-in-May-of-2017
11:53 AM seb_kuzminsky: i dont know what i'm talking about, i'm just a spectator here
12:02 PM jepler: that page renders blank for me, but http://webcache.googleusercontent.com/search?q=cache:_KqTd8Ku2YAJ:www.wherestheflux.com/single-post/2016/06/09/What-will-happen-in-May-of-2017 is legible
12:13 PM jepler: anyway, thanks for the context; A prediction of "period around 700+-100 days" is not disproven.
12:16 PM midyo: anyone on here?
12:17 PM archivist: they all went to the pub
12:17 PM midyo: Can you help with forum login problems?
12:18 PM jepler: midyo: what's up?
12:18 PM jepler: midyo: (I am a forum administrator)
12:19 PM midyo: I have forgotten my forum login details, and the system has'nt sent me an email to change password?
12:19 PM jepler: your login name is the same as your IRC nick?
12:19 PM midyo: my email is peteymidd@hotmail.co.uk
12:20 PM midyo: i THINK my login name is midyo but not 100%
12:20 PM jepler: there is an acocunt with that name and e-mail address
12:21 PM midyo: thats me then but forgot password
12:21 PM jepler: unfortunately, hotmail rejects password reset e-mails from the forum. do you have a different account such as gmail?
12:21 PM midyo: tried the reset routine but not working
12:21 PM midyo: no, only that one
12:22 PM jepler: OK, I can manually reset your password from here. Open a chat window directly to me and let me know what I should set it to.
12:24 PM jepler: midyo: did it work?
12:24 PM cradek: welp
12:24 PM JT-Shop: I usually set their password to pass and ask them to change it after logging in...
12:25 PM jepler: JT-Shop: that would have worked too
12:25 PM jepler: anyway they told me privately that it worked
12:25 PM cradek: jepler: can you tell what complaint hotmail has?
12:25 PM JT-Shop: yep
12:25 PM jepler: > host mx3.hotmail.com[65.55.92.152] said: 550 SC-001 (SNT004-MC2F29) Unfortunately, messages from 162.243.45.186 weren't sent. Please contact your Internet service provider since part of their network is on our block list. You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors.
12:25 PM jepler: which the last time I looked into it leads you to a maze of twisty passages
12:26 PM cradek: with the url and all, it's so close to having real information for you
12:26 PM cradek: you have such a nice ptr it's not that
12:27 PM jepler: "you aren't a huge webmail provider and you aren't paying your danegeld"
12:28 PM cradek: we broke email and say it's for the good of our "customers"
12:29 PM jepler: (I should look into sending via gmail again. When I first set it up, the mails were very slow to go out and I believed it was gmail rate-limiting me; but since then I learned it was misconfiguration on my side, and deliberate brokenness at digitalocean -- outgoing port 23 isn't available on IPv6, but I was trying to use it)
12:29 PM cradek: interesting
12:29 PM cradek: that sounds like such rewarding work
12:29 PM cradek: (sorry)
12:31 PM archivist: one can test IPs on blacklists and get them off, it is a pain
12:31 PM cradek: but hotmail doesn't even say what blacklist they are using, or if it is a dnsbl at all
12:32 PM jepler: archivist: do you have the knowledge to get us off whatever internal list live/outlook/hotmail is using?
12:32 PM jepler: if so we'd love your help
12:33 PM jepler: wow it's worse than I remembered -- not only is smtp port (25, not 23 as I stated earlier) blocked, but so are non-spam-source ones like submission and imap! https://www.digitalocean.com/community/questions/outgoing-connections-on-port-25-587-143-blocked-over-ipv6
12:33 PM jepler: afk for lunch
12:35 PM archivist: I just used a tool seems clean https://mxtoolbox.com/SuperTool.aspx?action=blacklist%3a162.243.45.186&run=toolpage
12:37 PM archivist: what domain are we sending from
12:37 PM cradek: the ptr says forum.linuxcnc.org
12:38 PM cradek: so FCrDNS should pass
12:40 PM archivist: no MX record!
12:42 PM archivist: I assume you are using some other mail server actually
12:46 PM archivist: mail.linuxcnc.org. 14400 IN MX 0 mx1.sub4.homie.mail.dreamhost.com.
12:49 PM archivist: quite a few problems to work through
12:49 PM archivist: one of which is Blacklisted by BACKSCATTERER
12:50 PM archivist: http://www.backscatterer.org/?ip=69.163.253.136
12:50 PM archivist: http://www.backscatterer.org/index.php
12:52 PM archivist: To track down what happened investigate your smtplogs near 10.05.2017 10:52 CEST +/-1 minute.
12:54 PM archivist: pay to get off that list early...wtf robbery
12:54 PM archivist: I am off out to play steam engines for a few hours
01:29 PM cradek: archivist: the dreamhost misconfiguration shouldn't affect the forum, but it is troubling
01:39 PM cradek: no MX record for the forum might be important. I think machines that send mail need to be able to receive it
01:40 PM cradek: although I also think if there's no MX, A is used
01:40 PM cradek: 220 forum.linuxcnc.org ESMTP Postfix (Ubuntu)
01:40 PM cradek: ... and it does answer
01:52 PM jepler: I've never heard that is requried and gmail/google doesn't seem to have either an MX or a listening SMTP on the A record for its outgoing servers
01:52 PM jepler: e.g., I have a mail header: Received: from mail-qt0-f172.google.com ([209.85.216.172])...
01:52 PM jepler: but there's no MX for mail-qt0-f172.google.com and 209.85.216.172 doesn't listen on smtp
01:53 PM jepler: on the other hand, you know the rules enforced on google are not the rules enforced on plebs
01:53 PM jepler: even when it comes to microsoft enforcing them
01:57 PM cradek: if we can trust the words of the reject message, "part of [your ISP's] network is on our block list" probably means that they have spammers sharing this IP range and it's not you/us at all
01:57 PM cradek: but again, it's all just guesses
02:33 PM jepler: yeah
02:33 PM jepler: the way the modern internet works, you're supposed to pay somebody to make sure your e-mails reach peoples' inboxes
03:42 PM Tom_itx: you guys probably know... what's a good web hosting service nowdays?
04:01 PM jepler: Tom_itx: Right now I have most of my eggs in the basket of Digital Ocean. VPSes from $5/month. My referral code: https://m.do.co/c/2f8ff7d3234b (you get $10 credit, I potentially get a credit after you spend $25)
04:02 PM jepler: Tom_itx: they've had 1 extended downtime affecting me in 3 years, which I consider a good average
04:03 PM Tom_itx: it's for a friend so it wouldn't be coming from me or i'd gladly give the referral
04:04 PM jepler: Tom_itx: I also have one server on atlantic.net, because they have a special intro-level server for $1/month.
04:04 PM Tom_itx: i'm just making suggestions to them as they are rather ignorant on it
04:05 PM jepler: broadly, I think the major VPS hosting providers all have a $5/month tier of machine. but of course it depends greatly on the kind of service you want to host whether that is enough.
04:05 PM jepler: the forum takes a $10/month instance and it has occasionally been under-powered (we think this is why we have had the occasional lock-ups, which may be solved know *knock on wood*)
04:05 PM Tom_itx: just a storefront type website
04:06 PM jepler: are they a person who wants to do things like update the PHP that runs their storefront? If so, VPS hosting is what they want. If not, they want some kind of hosted service which I am unfamiliar with
04:06 PM cradek: jepler: do you get an unchanging IP?
04:06 PM Tom_itx: i'll probably just let them go with some DIY site so i can stay detatched
04:06 PM Tom_itx: they're not web or code savvy at all
04:07 PM Tom_itx: and i don't really have time to maintain it for them
04:07 PM jepler: yeah they should pick a site which is 100% about hosting storefronts for people who don't concern themselves with computer code
04:07 PM jepler: if you're a mere mortal you can't / or won't want to set up integration with paypal or whoever the credit card processor of the day is.. it's no fun for a hardcore nerd, let alone for a human being.
04:08 PM jepler: but I don't know who to go to for a web-based storefront
04:08 PM Tom_itx: heh
04:08 PM Tom_itx: i didn't figure you would for that
04:09 PM Tom_itx: more than anything i guess i'm just trying to keep them from getting ripped
04:13 PM jepler: yeah I don't even know where to go for reviews of ecommerce hosting that you can trust
04:31 PM JT-Shop: I run two web stores with opencart
05:55 PM archivist: just got back, jepler there were a few errors that https://mxtoolbox.com found, run their problem finder on linuscnc.org
06:02 PM archivist: Local NS list does not match Parent NS list, the NS order is different from the two, not much of a problem
06:03 PM andypugh: serial port access.
06:03 PM andypugh: Using the RTAI driver seems to tie us to RTAI
06:04 PM pcw_mesa: I wonder how the stock serial driver does under Preempt-RT
06:05 PM andypugh: Does the UART buffer bytes internally, so that you can use direct outb/inb calls, or would a generic HAL driver have to handle that too? (I am asking you chaps in case you know, reading the UART docs would be the next stage, though I don’t actually _need_ a serial driver myself. But it keeps cropping up on the forum.
06:06 PM andypugh: I have done real-time serial, I used the Mesa UART.
06:06 PM andypugh: That works :-)
06:07 PM andypugh: Though I did have to kludge keeping the bytes in synch
06:07 PM pcw_mesa: Andy standard PC UART will have at least 16 byte RX and TX FIFOs
06:07 PM jepler: andypugh: The 16550 UART has a 16-byte FIFO on both the RX and TX ends. It's typically got a rate of 115200 bits/second, so with 8N1 data framing you only get about 11 bytes per 1ms
06:08 PM pcw_mesa: s/Andy/any/
06:08 PM andypugh: 11 bytes is plenty for some applications
06:09 PM pcw_mesa: and you could run it from a slower thread if needed
06:09 PM andypugh: 5 x 16-bit step-deltas and a checksum, for example
06:10 PM andypugh: I am nit sure what the various extant serial protocls use.
06:10 PM andypugh: I think many send inefficient text-mode commands.
06:11 PM jepler: https://en.wikibooks.org/wiki/Serial_Programming/DOS_Programming
06:12 PM jepler: anyway as long as you blacklist the kernel driver, I think an inb/outb-level driver is not too complex to write; it's a 20 year old chip
06:14 PM jepler: difficulty: the author of that page thought PASCAL was a pretty rad language
06:15 PM pcw_mesa: more like 30 year old chip
06:15 PM andypugh: PCW seems to be of the same opinion, I have only ever had VHDL and Pascal from him :-)
06:15 PM jepler: everything's 10 years older than I think
06:16 PM jepler: like take me for example
06:16 PM jepler: register map on page 17, I think this is the common "16550" http://www.ti.com/lit/ds/symlink/pc16550d.pdf
06:17 PM andypugh: I find myself 20 years older than I think. Still waiting for my life to start going properly. :-/
06:18 PM jepler: http://byterunner.com/16550.html
06:18 PM jepler: andypugh: yeah I worry that in 10 years I'll be 20 years wrong about the age of everything, and so on
06:19 PM jepler: grouse about the price of coffee at diners, etc
06:25 PM andypugh: I still think I have time for all the projects I think up, like a HAL serial driver…
07:01 PM seb_kuzminsky: sweet summer child
10:38 PM Tom_itx is now known as Tom_L