Dec. WLUG meeting reminder! Topic: DMARC, SPF and DKIM
by Tim Keller
Hey Everybody!
We've got a meeting tomorrow!
Date & Time: December 13th 2018 @ 7PM
Location: WPI Student Center Mid Century Room (rm 331)
Presenter: Frank Sweetser
Topic: DMARC, SPF and DKIM.
This topic came up on the list as a possible reason why some people weren't
seeing all the mail on the list and I thought it might be an interesting
topic. The good old days of the internet are sadly dead. Now that the
Nigerian princes have given up trying to distribute their money, we're
instead left with more sophisticated attacks. DMARC, SPF and DKIM are a few
of the techniques now being employed to help cut down on spoofed email.
As usual refreshments and snacks will be provided and afterwards we'll head
off from dinner and keep the conversation going.
Thanks,
Tim.
--
I am leery of the allegiances of any politician who refers to their
constituents as "consumers".
2 weeks, 1 day
cool HW-info linux/bsd tool "inxi"
by Doug Mildram
doug> Ran into this out of the blue, and wanted to share the joy
(if you like attempting to understand the gore of PC
hardware....
or figure out what you just plugged in, or assembled,etc.
Sample output below! I havent even studied the args/options yet.
Sections I "asked for" (the options/args I used.. "inxi -Fxz" , gave
me....)
System,Machine,CPU,Graphics,Audio,Network,Drives,Partition,Sensors,Info.
I like how it reports disk (3 below) info,
with per-disk temperature! Except on an SSD on another machine, temp.=0C
I like how it reports per-disk temperature!
Except on an SSD, I got temp.=0C
sections I asked for with :
Drives: HDD Total Size: 250.1GB (5.1% used) ID-1: /dev/sda model:
Samsung_SSD_860 size: 250.1GB temp: 0C
pardon the TMI/detail+long_lines below. -doug
*Inix* is available in most mainstream Linux distribution repositories, and
runs on BSDs as well.
$ sudo apt-get install inxi [On *Debian/Ubuntu/Linux Mint*]
$ sudo yum install inxi [On *CentOs/RHEL/Fedora*]
$ sudo dnf install inxi [On *Fedora 22+*]
$ inxi -Fxz
> System: Host: P5Q Kernel: 3.10.0-862.14.4.el7.x86_64 x86_64 bits: 64
> compiler: gcc v: 4.8.5 Console: tty 1
> Distro: CentOS Linux release 7.5.1804 (Core)
> Machine: Type: Desktop Mobo: ASUSTeK model: P5Q-PRO v: Rev 1.xx serial:
> <filter> BIOS: American Megatrends
> v: 2102 date: 02/23/2009
> CPU: Topology: Dual Core model: Intel Core2 Duo E8400 bits: 64 type:
> MCP arch: Penryn rev: A
> L2 cache: 6144 KiB
> flags: lm nx pae sse sse2 sse3 sse4_1 ssse3 vmx bogomips: 11997
> Speed: 2003 MHz min/max: 2003/3003 MHz Core speeds (MHz): 1:
> 2003 2: 2003
> Graphics: Device-1: Advanced Micro Devices [AMD/ATI] RV610 [Radeon HD
> 2400 PRO/XT] driver: radeon v: kernel
> bus ID: 01:00.0
> Display: server: X.org 1.19.5 driver: ati,radeon unloaded:
> fbdev,modesetting,vesa tty: 134x42
> Message: Advanced graphics data unavailable in console. Try -G
> --display
> Audio: Device-1: VIA VT1720/24 [Envy24PT/HT] PCI Multi-Channel Audio
> driver: snd_ice1724 v: kernel
> bus ID: 05:00.0
> Sound Server: ALSA v: k3.10.0-862.14.4.el7.x86_64
> Network: Device-1: Qualcomm Atheros AR8121/AR8113/AR8114 Gigabit or Fast
> Ethernet driver: ATL1E v: N/A
> port: bc00 bus ID: 02:00.0
> IF: enp2s0 state: down mac: <filter>
> Device-2: Intel 82541PI Gigabit Ethernet driver: e1000 v:
> 7.3.21-k8-NAPI port: ec00 bus ID: 07:01.0
> IF: enp7s1 state: up speed: 1000 Mbps duplex: full mac: <filter>
> IF-ID-1: virbr0 state: down mac: <filter>
> IF-ID-2: virbr0-nic state: down mac: <filter>
> Drives: Local Storage: total: 1.41 TiB used: 398.89 GiB (27.6%)
> ID-1: /dev/sda vendor: Hitachi model: HDS724040KLSA80 size:
> 372.61 GiB temp: 39 C
> ID-2: /dev/sdb vendor: Western Digital model: WD7500AACS-65D6B0
> size: 698.64 GiB temp: 35 C
> ID-3: /dev/sdc vendor: Hitachi model: HDS724040KLSA80 size:
> 372.61 GiB temp: 42 C
> Partition: ID-1: / size: 64.04 GiB used: 9.41 GiB (14.7%) fs: ext4 dev:
> /dev/sdb1
> Sensors: System Temperatures: cpu: 31.0 C mobo: N/A gpu: radeon temp: 43
> C
> Fan Speeds (RPM): N/A
> Info: Processes: 196 Uptime: 11h 09m Memory: 1.79 GiB used: 896.5 MiB
> (48.8%) Init: systemd runlevel: 5
> Compilers: gcc: N/A Shell: bash v: 4.2.46 inxi: 3.0.26
>
2 weeks, 1 day
Apt-X support
by Richard Klein
I'm looking at bluetooth dongles for my desktop. Is Apt-X support provided
by the hardware or the OS?
--
Rich
3 weeks
new/old toy soon? (yet another Gigabyte GA-NNN looming)
by Doug Mildram
Thanks for the support and keeping the list alive. Perhaps too alive (I can
rant/ramble!)
Are Gigabyte motherboards OK? I've only had one so far. Now dying perhaps.
Looking ahead..... since I upgrade "combo style" (all ram and cpu
attached/included)
I'm gonna look at (days from now) a used motherboard+cpu+ram+beast
video+beast fan,
hope it fits under my hood, dude speaks well about his retired
GIGABYTE GA-870A-UD3 SKT.AM3 AMD870+SB850 4XDDR3-1866, IEEE1394
USB3, SATA3, RAID, ATX
plus cpu,ram, and even fan info on this BEAST of a fan, should i be scared?
https://www.amazon.com/Noctua-NH-U9B-SE2-CPU-Cooler/dp/B002VT1GZ6
doug> I find it cool that a machine/mb that old,
is still way more than I need. I've only got one HD/disk for example.
I'll try to buy her a tiny computer NEW someday if my new/old cheap-out
fails.
I want less power! Good brakes please! Ballpark of $100+ for the combo
you CAN still find online if you dare and you get lucky that it really
works for you.
...below, tangent about the seller i will meet this weekend. Sounds very
smart/honest!
I almost got him interested in our meeting. He said: (plus, he's a CS engr)
Hello network engineer, me> Engineer too....I also
a) use Linux only at home
b) used Linux only on that machine, rock solid :)
The cpu does not come with embedded gpu : I saved 10$ at the time,
too bad now!
1 month, 1 week
desktop (wife=moved->linux Mint) MB/sata/grub fun
by Doug Mildram
Warning: there's a couple "fun" ( my definition for "new to me")
errors/areas
in this LONG email.
Months ago i managed to move wife/maureen's desktop environment to
Mint(ubuntu underneath).
Usage: firefox,gmail (almost nothing else of note. This took some
persuading, but desktops are such a fallback these days......another topic
for another day)
DESKTOP: 10?yr-old Gigabyte motherboard with sata2 ... 4 ports. I only use
1 sata port.
I "gave" it a $90/bestbuy 256g SSD Samsung months ago for /dev/sda
which ran well+fast of course, turns out the SSD is actually still fine
internally.
A FEW WEEKS AGO, the "hint" symptom (1 of 2 in this long story) for disk
woes was....
(well, it started crashing occasionally, then)
ON BOOT, it would sometimes STOP at this prompt
initramfs>
and with good eyes as the boot-attempt screen(s) would fly by and return to
above prompt,
I discovered I could fix it with ( actually i did not use the "-y"
prompt, but it's the same fix either way)
initramfs> fsck -y /dev/sda1
Which would fix a few things, nothing scary for an ex-unix-sysadmin, and
initramfs> exit ######## would allow it to boot and
be OK for days or so.
I taped THAT magic (fsck...) onto a paper mini-sign on the PC for another
rainy day.
TODAY, the crash was followed by not booting (random results, kernel panics
or bios/grub waiting). Worse (not that we care!) near the end of this
story,
the Patriots gave up cool kickoff return with a lead and 0:04
left.
But timing-wise, I'm glad I had a few hours in the living room to debug all
this.
So I brought the SSD to my other living room desktop (not booting FROM
it...)
checked SSD with sudo smartcl -a /dev/sda #### AND ITS FINE.
I moved the SSD "back" to wife's PC on another SATA port.
It's fine! (motherboard deteriorating i guess....but might last another
decade).
I did run into.... ("created" by moving the disk i assume)
.... a boot/warning error NEW TO ME:
On initial boot a WARNING ERROR on the early/black screen
(similar to where initramfs> shows up..just before that i think)
"warning: environment block too small"
was actually ignorable (after a few secs, boot marched on to kernel/logo).
But I found "it's a thing" and the error appears solvable with first google
hit suggesting
linux user# sudo rm /boot/grub/grubenv # or "mv" it somewhere.old; 1024
byte file.
...............# sudo grub-editenv /boot/grub/grubenv create
and reboot. Seems good now except (new i think; probably from the sata
port move?)
there's a ONE MINUTE wait on the initial boot with the Mint logo flashing.
Final things-to-inspect: (no need to "fix" /etc/fstab
which of course does find the disk parts ( just / and swap)
by UUID
and /var/log/syslog ( I have exported it all, i think the disk errors
stopped. )
=========================WRAPUP
Haven't solved this learn-all mission yet, but...hope to make it to WLUG
THURS EVE
and i just thought of a topic. Trick is knowing where to start such a
story/tutorial;
I'd try to skip over BIOS and sata/disk/etc basics, the fuzzy parts for me
involve "initramfs" ... grub ..... and maybe that's it for me.
Desired talk/take-home: linux BOOT steps you don't want to know. -doug
1 month, 1 week
Topic of Thursday meeting
by Keith Wright
> From: "Anderson, Charles R" <cra(a)wpi.edu>
> Subject: [WLUG] WLUG meeting this week
>
> We have a WLUG meeting scheduled for this Thursday at 7pm in the WPI
> Campus Center, Mid-Century Room (the location we use most often).
>
> Subject: [WLUG] Re: December Meeting Reminder!
> From: Chuck Anderson via WLUG <wlug(a)lists.wlug.org>
>
> Maybe we could talk about DMARC, DKIM, and SPF! ****pssst! Frank!***
Why does one message say From: cra(a)wpi.edu,
and the other From: wlug(a)lists.wlug.org?
(Nervermind, CRA explained that.)
I don't want to try to prevent anyone from talking
about anything, but I don't have much to say about that.
I would have wrote you a letter, but I couldn't spell PHLTT!!
If Frank does not have a presentation, I could commit
by Thursday to make some slides and bring a laptop.
I tested slide-showing a few months ago with the WPI
cable in the Mid-century Room and it worked.
Here's the catch: My usual ride is unavailable that
day. I don't drive and I have not been walking well.
I used to walk to WLUG; I fell on the hill.
No problem; I got up and went on; it happens.
I don't want to be carrying heavy and fragile equipment.
I tried to go for a walk this morning, but fell and skinned
my knee at the end of my own driveway.
If someone could commit to pick me up at my house
about 1/2 hour before the meeting I would make sure
I was ready enough to fake it. I live about a mile
from WPI. Send me mail.
I will show you some of what I have been doing,
and how I do it.
The title of my talk:
Love Programs work better than Love Poems
Computatational Metaphysics
Why and how to write soutce code that can be read
Or something else if I thnk of it.
Someone said recently that one of the best talks
ever was Doug Waud showing TeX printing stuff nobody
understood. I thought: "I could do that".
I am not a pharmacist, so I will dazzle you with
Scheme programs and Algebraic Geometry run through LaTeX.
All in living black and white (or glowing green).
-- Keith
1 month, 1 week
WLUG mailing list
by Keith Wright
> From: "Anderson, Charles R" <cra(a)wpi.edu>
> To: "wlug(a)lists.wlug.org" <wlug(a)lists.wlug.org>
> Subject: [WLUG] WLUG meeting this week
>
> I haven't seen any messages to the list since November 8,
> so I'm sending this message to see if the mailing list still works.
> We have a WLUG meeting scheduled for this Thursday at 7pm in the WPI
> Campus Center, Mid-Century Room (the location we use most often).
There might be something wrong, I saw:
> From: "thinkbrown(a)gmail.com" <thinkbrown(a)gmail.com>
> Date: Thu, 8 Nov 2018 18:27:19 -0500
> To: wlug(a)lists.wlug.org
> Subject: [WLUG] Frantic last minute room change
> Sorry for the last minute notice
> Logan (pretending to be Tim)
I missed that meeting, and I think the one before that,
due to scheduling conflicts.
You might find these two in the tl/dr filrer:
> From: Dennis Payne <dulsi(a)identicalsoftware.com>
> Date: Tue, 04 Dec 2018 07:56:41 -0500
> Subject: [WLUG] OpenGameArt Movie Video Game
> I spent the month working in my free time on a new computer game.
>
> From: Doug Mildram <dmildram(a)gmail.com>
> Date: Sun, 9 Dec 2018 23:07:05 -0500
> To: wlug(a)lists.wlug.org
> Subject: [WLUG] desktop (wife=moved->linux Mint) MB/sata/grub fun
>
> Warning: there's a couple "fun" ( my definition for "new to me")
> errors/areas in this LONG email.
If you want 140 character dim witticisms,
you know where to look. This not that.
The message that demands attention is this:
> From: Tim Keller <turbofx(a)gmail.com>
> Subject: [WLUG] December Meeting Reminder!
>
> We've got a meeting coming up next week!
> > Date: Dec 13, 2018 @ 7PM.
> > Location: WPI Campus Center (Mid Century Room 331)
> > Topic: To Be Decided! If there's something you'd
> > like to talk about drop me a line! Otherwise
>
C.R.A continues:
> From: "Anderson, Charles R" <cra(a)wpi.edu>
> Subject: [WLUG] WLUG meeting this week
>
> We have a WLUG meeting scheduled for this Thursday at 7pm in the WPI
> Campus Center, Mid-Century Room (the location we use most often).
Yes. If you did not see Tim's announcement of the same,
then something is wrong.
Which leads me to my proposal, which I will put in another
message so that it is not lost at the bottom.
-- Keith
PS: While I was writing this, two new messages came to me
from wlug, one appears to be a copy of Doug Mildram's message
dated 2018-12-09 the other a reply to that.
1 month, 1 week
mailing list issues
by Anderson, Charles R
Some people (including myself) have not been receiving emails sent to the list. I'm guessing that DMARC may be blocking messages from senders' domains that have DMARC set up, so I made a MailMan change to enable DMARC Mitigations. This works by replacing your "From: you(a)wherever.com" with "From: Your Full Name via WLUG <wlug(a)lists.wlug.org>". Your original From: appears in the Reply-To: header.
I'm also sending this message to test delivery to a few domains like yahoo.com and gmail.com.
1 month, 1 week
December Meeting Reminder!
by Tim Keller
Hey Gang,
We've got a meeting coming up next week!
Date: Dec 13, 2018 @ 7PM.
Location: WPI Campus Center (Mid Century Room 331)
Topic: To Be Decided! If there's something you'd like to talk about drop me
a line! Otherwise
As usual, refreshments and snacks will be provided and we'll head off for
dinner afterwards.
Thanks,
Tim.
--
I am leery of the allegiances of any politician who refers to their
constituents as "consumers".
1 month, 1 week
desktop (linux Mint/ubuntu) Motherboard/sata/grub fun
by Doug Mildram
Warning: there's a couple "fun" ( aka "new to me") things in this LONG
email. SUMMARY 2-lines-below:
1) on reboot, an initramfs prompt, errors only seen briefly as boot screen
overwrites it. Needed fsck.
2) later when things got worse, my solution followed by a different error
message re: "environment block too small".
the LONG story:
Months ago i managed to move wife/maureen's desktop environment to
Mint(ubuntu underneath).
Usage: firefox,gmail (almost nothing else of note. This took some
persuading, but desktops are such a fallback these days......another topic
for another day)
DESKTOP: 10?yr-old Gigabyte motherboard with sata2/sataII ... 4 ports. I
only use 1 sata port.
I "gave" it a $90/bestbuy 256g SSD Samsung months ago for /dev/sda
which ran well+fast of course, turns out the SSD is actually still fine
internally.
A FEW WEEKS AGO, the "hint" symptom (1 of 2 in this long story) for disk
woes was....
( it started crashing occasionally, then)
ON BOOT, it would sometimes STOP at this prompt
initramfs>
and with good eyes as the boot-attempt screen(s) would fly by and return to
above prompt,
I discovered I could fix it with ( actually i did not use the "-y"
prompt, but it's the same fix either way)
initramfs> fsck -y /dev/sda1
Which worked every time (a few times), nothing scary for an
ex-unix-sysadmin, followed by
initramfs> exit ######## would allow it to boot and
be OK for days or so.
I taped THAT magic (fsck...) onto a paper mini-sign on the PC for another
rainy day.
TODAY, the crash was followed by not booting (random results, kernel panics
or bios/grub waiting).
So I brought the SSD to my other living room desktop (not booting FROM
it...)
checked SSD with sudo smartcl -a /dev/sda #### AND ITS FINE.
I moved the SSD "back" to wife's PC on another SATA port.
It's fine! (motherboard deteriorating i guess....but might last another
decade).
I did run into.... ("created" by moving the disk i assume)
.... a boot/warning error NEW TO ME:
On initial boot a WARNING ERROR on the early/black screen
(similar to where initramfs> shows up..just before that i think)
"warning: environment block too small"
was actually ignorable (after a few secs, boot marched on to kernel/logo).
But I found "it's a thing" and the error appears solvable with first google
hit suggesting
linux user# sudo rm /boot/grub/grubenv # or "mv" it somewhere.old; 1024
byte file.
...............# sudo grub-editenv /boot/grub/grubenv create
and reboot. Seems good now except (new i think; probably from the sata
port move?)
there's a ONE MINUTE wait on the initial boot with the Mint logo flashing.
Final things-to-inspect: (no need to "fix" /etc/fstab
which of course does find the disk parts ( just / and swap)
by UUID
and /var/log/syslog ( I have exportedthe old history to study, i think the
disk errors stopped. )
=========================WRAPUP
Haven't solved this learn-all mission yet, but...hope to make it to WLUG
THURS EVE
and i just thought of a (this) topic. Trick is knowing where to start such
a story/tutorial;
I'd try to skip over BIOS and sata/disk/etc basics, the fuzzy parts for me
involve "initramfs" ... grub ..... and maybe that's it for me.
Desired talk/take-home: linux BOOT steps you don't want to know. -doug
1 month, 1 week
