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Re: adsl keep alive script
On Saturday 01 December 2001 10:12 am, Arie Vayner wrote:
> Hi
>
> Again, I must say that I work for Netvision (please do not flame ;-)
> Please see my comments inline.
Donno about others, but I'm glad to see someone from Netvision tech staff in
the Linux-IL mailing lists ;)
> > This is quite irrelevant, since ADSL users typically leave
> > their ADSL connection on 100% of the time. Or, if they only
> > turn on their computer some of the day, they all tend to do
> > it on the same time. The end result is that an ADSL provider
> > probably (and I didn't check this with actual
> > statistics) needs almost as many IP numbers as it has
> > customers - even if these are not fixed IPs.
>
> I am sorry to tell you, but you are quite wrong here...
I did some checking with many ADSL users (most of them are Windows users),
most of them turn off their machines when they finish surfing/chatting/email.
Of course - there are the "warez dudez" who leave their machines open night
and day to download the latest warez, and many Linux users who leave their
Linux machines (or Linux gateways) open 24 hours a day, so the IP cosuming is
not as big as many people thought it would be.
> > Users which only log in infrequently probably don't get ADSL
> > - unless they are rich and don't mind throwing away money.
Yes, it's only getting cheaper if you're comparing it against 128K ISDN
connection price (not considering Bezeq 99 NIS opportunity for 3 months and
the crappy upload stream capabilities [64k] with the cheapest plan).
> > The only benefit of non-fixed IPs that I can see is lower
> > administration effort (no need to remember which IP belongs
> > to whom) and easier renumbering, if the ISP decides to move
> > its ADSL block to a different address block.
>
> The other benefit is that the ISP can make his routing table smaller,
> avoiding using host routes for each and every user, and being able to
> aggregate the larger pools of IPs allocated to users on demand.
Agred.
> > > in fact, i'd expect providers to start NATing their ADSL users, if
> > > their number grows too far and large. otherwise, i don't see how
> > > millions of ADSL/cable/fixed-line connections could be
> >
> > supported, and
>
> Doing NAT on a large scale basis is a difficult task, and is not a
> really good solution. I guess you wouldn't have liked being connected
> behind a NAT connection, wouldn't you?
Which reminds me Tevel experiment with their cable modems & Internet
connection (all the people are behind NAT - so if 1 kid abused EFNet - no one
will be able to use that same IRC servers).
> > > i don't see ipv6 actually coming in any time soon (i.e. withing the
> > > next 3-4 years).
>
> As it seems, IPv6 is being pushed quite hard by companies like Cisco,
> and extensive testing is being done. I already heard about commercial
> providers using it with a subset of customers.
Such as? is there any time frame for a massive deployment? maybe an
"experiment" plan in the works by Netvision? I'll be happy to join...
> I think that it will be used sooner by providers who need it's features
> (i.e. lot's of IP addresses).
> The main reason it is hard to deploy IPv6 (except that people are not
> familiar with it) is that the hosts (PCs) lack the easy support for it
> (like they have for IPv4).
> I think this is about to change...
Change? umm, I didn't see support for this on Win XP/2k/ME. Sure, Linux users
can always recompile the kernel in a few mintues and have IPv6 support, but
how Netivision can do it with their majority of their clients who use
Windows? (and don't get me started with the majority of Israeli Windows sys
admin people who are simply and utterly CRAP - and nothing can teach me this
other then the well known Nimda Virus - it is an amazing how many Windows sys
admins don't have a single clue about security!)...
Hetz Ben Hamo
hetz@kde.org
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