From: ibuprofin@painkiller.example.tld.invalid
On Mon, 31 Dec 2012, in the Usenet newsgroup alt.os.linux.mandriva, in article
, Adam wrote:
Happy New Year!
>Moe Trin wrote:
[Thinkpad T60]
>> The "From:" address of mail I send out might be something like "Moe
>> Trin ", not any more weird or mysterious as
>> the CompUServ or Prodigy addresses
>CompuServe User IDs weren't mysterious to me. They were just
>standard DEC PPNs like the one I'd had for a class a few years
>before. A few of the project numbers had special significance; one
>was for SIG/Forum sysops (who had certain privileges), another was
>for CIS contractors, etc.
Few people recognized them as anything more than random digits. Some
didn't even notice that the "8" and "9" digits were missing. There
were a number of truly bizarre schemes out there - several of which
used just a seven digit number while at least two used 6 character
strings (case-less alphanumerics). X.400 names were almost easier to
keep track of.
>> Yes, secure sockets level (SSL) can encrypt a web session (https)
>> or SSH, but things are simply not foolproof. I'm rarely in that
>> much of a hurry that I NEED to buy something or check my bank
>> accounts from a public hot-spot.
>The only exception I can think of is trying to increase an eBay bid
>within the last 60 seconds before the auction ends. The most
>competitive auctions are usually won by a bid placed just before the
>closing. (If I want something that badly, I can stay home!)
That's probably the correct solution. In most cases, you'd probably
get away with bidding from a hot-spot, but the risk is non-zero. (But
then, the risk of eBay isn't exactly zero either.)
[hotspot networking]
>>> But what if I go from one wireless network to another without
>>> rebooting?
>> You mean hibernating between them? I typically don't mind the
>> extra minute or so it takes to cold-boot, so I usually shut down
>> when moving from one to another.
>> Does that make sense to you?
>Somewhat... enough to tell me I should shut down before moving
>farther than an adjacent building.
You can try moving without shutting down - if all else fails, you can
restart the wireless networking either with the distribution specific
helper or icon. Pressing the appropriate key on the laptop to turn
off the networking and then turn it back on may also restart the link
and force it to acquire a new address.
>I'd assume that the whole DCC campus is a giant hot spot, but I have
>no idea (yet) whether it's all one or separate for each building.
The individual wireless devices have a relatively short range, maybe
up to a thousand feet with no intervening obstacles, but that would
likely be with reduced bandwidth. At Paradise Valley Community
College, the entire campus is not quite a quarter square mile (and
none of the buildings are more than 5-600 feet from a central spot)
yet they have three hot-spots that I'm aware of (library, cafeteria
and student center) using different RFC1918 /23s. I've never tried to
use wireless at ASU or NAU so I don't know what their setups are like.
It's possible to have a set up such that you get a single IP that
stays with you as you move abound something like a campus, but I've
not seen many setups that do that.
[firewall rules]
>> BUT I do not allow any _incoming_ connections at a hot-spot.
>That made sense when I realized that a "connection" is not the same
>as a data packet. If you request a web page, you're certainly going
>to want to receive it from the remote web server, but then you'd
>started that connection.
Bingo! See my response to Wolfgang Schelongowski last week. I'm
intentionally not running any servers on the laptop that I want the
world to reach, so even without a firewall, I've got essentially
nothing accepting inbounds. The firewall is merely a case of dotting
the "t"s and crossing the "i"s as extra (free) insurance.
>>> My own little LAN at home is 192.168.0.0/26
>> Common network, uncommon net-mask.
>Well, back when I was setting it up, I didn't want to use any more
>addresses than needed. I'm used to resources being limited, not
>overwhelming!
When they were developing IPv4, they really weren't thinking about
conserving resources - hence the allocation of /8s to "this" computer,
"everybody" and the loopback. While IPv6 has corrected that, the
philosophy still exists in spades - RFC6177 ("IPv6 Address Assignment
to End Sites") _narrowed_ the recommendations of it's predecessor
(RFC3177 "IAB/IESG Recommendations on IPv6 Address Allocations to
Sites") but they're still talking of /64 networks (1.844 x 10^19
hosts) which if you haven't disabled IPv6 on your systems, it's
configuring an IPv6 LinkLocal network on your Ethernet to that. If
you had every Ethernet card ever made on your LAN, you could still
give each card 65k addresses and still have left-overs. RFC1606 not
withstanding, 128 bit addresses are overkill.
[choosing a case]
>> You're saying "a carton" which I interpret as a cardboard box. I'd
>> really not bother, as a purpose built case is relatively inexpensive
>> and built to handle to situation
>How else can I tell whether my laptop will fit into any particular
>case?
A freebie I picked up somewhere is a tape measure - about 2" square by
a third of an inch thick (it also lives in my briefcase). ;-)
>Or will any case that says "for 14.1" laptops" (or larger) be sure to
>have enough room?
That should work. If you're speaking of laptops, the sizes are more or
less standardized. If you think about it, the display size is the main
control of case size, and those are pretty well cast in stone. For
perspective, my wife's 15.6" ASUS is 14.6 x 10.1 x 1.4 inches and 5.8
pounds, while my HP is 14.7 x 9.7 x 1.5 inches and 5.5 pounds. I've
purchased several cases and sleeves for ours, and they've all fit
reasonably. I think that every case/sleeve has listed the maximum
dimensions as well as advertising a "nominal" size. The differences
in the various cases/sleeves usually wind up being quality (materials
and construction), the thickness (usually padding material) and how
many extra places they include to stash things. The sleeves lack
handles, but the cases may include a shoulder strap in addition to a
handle.
>But if I bring the thing to campus, I may also have a fat textbook,
>library books, etc. and I know having to carry two cases increases the
>chance of my forgetting one of them. Maybe I'll eventually need two
>cases -- one just for the laptop and one for the laptop plus lots of
>other stuff.
[continued in next message]
--- SoupGate-Win32 v1.05
* Origin: you cannot sedate... all the things you hate (1:229/2)
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