SEO

So, the PHB's computer is doing windows update, and I got up to walk
all the way up front (~75 ft, through a cold machine shop), and realized
I can tell when it's done from here. This is what tcpdump gave me just now:

--------------------------<quote>--------------------------------
09:49:40.836590 arp who-has 10.253.117.10 tell 10.254.239.17
09:49:40.836601 arp who-has 10.253.117.8 tell 10.254.239.17
09:49:40.836605 arp who-has 10.253.117.7 tell 10.254.239.17
09:49:40.836614 arp who-has 10.253.117.9 tell 10.254.239.17
09:49:40.836618 arp who-has 10.253.117.6 tell 10.254.239.17
09:49:40.945967 arp who-has 10.253.117.16 tell 10.254.239.17
09:49:40.945971 arp who-has 10.253.117.15 tell 10.254.239.17
09:49:40.945982 arp who-has 10.253.117.13 tell 10.254.239.17
09:49:40.945985 arp who-has 10.253.117.12 tell 10.254.239.17
09:49:40.945996 arp who-has 10.253.117.17 tell 10.254.239.17
09:49:40.946000 arp who-has 10.253.117.14 tell 10.254.239.17
09:49:41.055346 arp who-has 10.253.117.19 tell 10.254.239.17
09:49:41.055357 arp who-has 10.253.117.21 tell 10.254.239.17
09:49:41.055360 arp who-has 10.253.117.18 tell 10.254.239.17
09:49:41.055362 arp who-has 10.253.117.23 tell 10.254.239.17
09:49:41.055373 arp who-has 10.253.117.20 tell 10.254.239.17
09:49:41.055378 arp who-has 10.253.117.22 tell 10.254.239.17
09:49:41.164724 arp who-has 10.253.117.27 tell 10.254.239.17
09:49:41.164727 arp who-has 10.253.117.29 tell 10.254.239.17
09:49:41.164738 arp who-has 10.253.117.24 tell 10.254.239.17
09:49:41.164746 arp who-has 10.253.117.26 tell 10.254.239.17
09:49:41.164748 arp who-has 10.253.117.28 tell 10.254.239.17
09:49:41.164759 arp who-has 10.253.117.25 tell 10.254.239.17
09:49:41.274103 arp who-has 10.253.117.35 tell 10.254.239.17
09:49:41.274107 arp who-has 10.253.117.34 tell 10.254.239.17
09:49:41.274118 arp who-has 10.253.117.32 tell 10.254.239.17
09:49:41.274120 arp who-has 10.253.117.31 tell 10.254.239.17
09:49:41.274131 arp who-has 10.253.117.33 tell 10.254.239.17
09:49:41.274134 arp who-has 10.253.117.30 tell 10.254.239.17
09:49:41.383485 arp who-has 10.253.117.40 tell 10.254.239.17
09:49:41.383488 arp who-has 10.253.117.39 tell 10.254.239.17
09:49:41.383498 arp who-has 10.253.117.37 tell 10.254.239.17
09:49:41.383502 arp who-has 10.253.117.36 tell 10.254.239.17
09:49:41.383511 arp who-has 10.253.117.41 tell 10.254.239.17
09:49:41.383520 arp who-has 10.253.117.38 tell 10.254.239.17
09:49:41.492875 arp who-has 10.253.117.43 tell 10.254.239.17
09:49:41.492882 arp who-has 10.253.117.45 tell 10.254.239.17
09:49:41.492885 arp who-has 10.253.117.47 tell 10.254.239.17
09:49:41.492890 arp who-has 10.253.117.42 tell 10.254.239.17
09:49:41.492894 arp who-has 10.253.117.44 tell 10.254.239.17
09:49:41.492899 arp who-has 10.253.117.46 tell 10.254.239.17
09:49:43.840131 arp who-has thunderbird.dsl-verizon.net tell 10.254.239.20
09:49:43.840179 arp reply thunderbird.dsl-verizon.net is-at 0:2:2a:cb:49:ce
09:49:52.884207 arp who-has 10.253.117.48 tell 10.254.239.17
09:49:52.899792 arp who-has 10.253.117.49 tell 10.254.239.17
09:49:52.915389 arp who-has 10.253.117.50 tell 10.254.239.17
09:49:52.931037 arp who-has 10.253.117.51 tell 10.254.239.17
09:49:52.993557 arp who-has 10.253.117.52 tell 10.254.239.17

rich@Vehicle:~$
-------------------------<end quote>------------------------------
I wonder who the hell 10.253.117.* are? And I don't remember what
"arp" stands for. Address Resolution Protocol?

But it's kind of spooky. Also kind of neat - the time is in milliseconds.
:-)

Apropos nothing. I just thought it was kinda cute. Y'know, like when
you get a new toy you want to show it off to all your friends. And
especially when there's some assembly required. ¿:->

Cheers!
Rich

[Followup-To: header set to alt.os.linux.slackware]
Rich Grise wrote:
> -------------------------<end quote>------------------------------
> I wonder who the hell 10.253.117.* are?

10.*.*.*, like 192.168.*.*, is a range reserved for private use. machines
with such addresses cannot be directly connected to the internet, they need
to go through masquerading/NAT.

> And I don't remember what
> "arp" stands for. Address Resolution Protocol?

yes:

<http://whatis.techtarget.com/definition/0,,sid9_gci213780,00.html>

--
Joost Kremers joostkremers@yahoo.com
Selbst in die Unterwelt dringt durch Spalten Licht
EN:SiS(9)

on 2004-03-06, in <slrnc4k8r2.i5.joostkremers@j.kremers4.news.arnhem .chello.nl>,
these words of wisdom from Joost Kremers did appear:
> [Followup-To: header set to alt.os.linux.slackware]
> Rich Grise wrote:
>> -------------------------<end quote>------------------------------
>> I wonder who the hell 10.253.117.* are?
>
> 10.*.*.*, like 192.168.*.*, is a range reserved for private use. machines
> with such addresses cannot be directly connected to the internet, they need
> to go through masquerading/NAT.
>
>> And I don't remember what
>> "arp" stands for. Address Resolution Protocol?
>
> yes:
>
><http://whatis.techtarget.com/definition/0,,sid9_gci213780,00.html>

Thanks! Yes, I know about masquerading; Right now there's lessee ...
4 computers on the subnet.

I've got a leases file showing a whole bunch of leases; only a couple
of computers are on right now. I plan to make a subnet or two. There's
a diagram at
http://home.earthlink.net/~entheos_e...ntheos_LAN.gif .

Oh, yeah, I forgot to mention - bellerophon used to be ABI-Ops, but
I've repartitioned and it's exclusively Slack 9.1 now.

My holy Bob sakes alive. of my 3 computers and Joe's, there are
two running nothing but Linux.

Oh, and Real Soon Now, if anybody asks for it, I'll post bellerophon's
/var/log/packages, or at least count the packages. It's an absolute
bare-bones server. At the moment, bellerophon has thunderbird's monitor,
and I'm at vehicle with a ssh open on thunderbird. entheos is just sitting there
with earthlink's ftp client, and several other apps. open.

So, do those numbers look logical? (ip #s with ?'s) I'm going to have
to make some kind of truth table to learn what netmasks really do, and
I think I'll have to get out the scientific calculator to figure out how
many ways there are to connect these 4 computers together. Oh, yeah.
Vehicle, Entheos, Thunderbird, and Bellerophon are all in my office.
Boogeyman, ABI-Ofc1, ABI-Quality, and ABI-Chief are up front.

So, In my saga, I've got to the point of looking at DNS, thinking without
a hosts file, where do apps know where to send their stuff? Well, there's
a dhcp.leases file, and it's got hostnames - I haven't determined
yet if <whatever app or daemon needs an IP> gets the name from the
/etc/hosts file, from /etc/HOSTNAME, or from DHCP_HOSTNAME, but having
seen the hostname in the /var/state/dhcp/dhcpd.leases file, I'm wondering,
is there just some switch in the config file such that those hostnames in
the leases file get exposed? (Y'know, so ping bellerophon and so on will
work.)

Thanks,
Rich