[PLUG] E-mail server?

[drew wymore]

On 1/1/07, someone <plug_0 at robinson-west.com> wrote:
>
> > >From a managment standpoint DHCP is much easier but requires more
> upfront
> > work (DHCP server, Accounting/Radius). If you're using a static setup
> you
> > risk having only roughly 63 customers per /24 subnet (depending on how
> its
> > engineered) so you're looking at additional cost as you grow because
> you're
> > paying someone to submit applications to ARIN for new subnets as well as
> > paying the registration fee's. Of course if you go DHCP then you have to
> > deal with things like the MPAA and RIAA complaints and being able to
> > accurately correlate authentication and IP data to a specific account
> > which takes time and money :-)
> >
> > This idea could be argued for ever and ever but I guess comes down to
> the
> > time and money and engineering you want to put into a network
>
> Well, DSL service providers offer static subnets where they don't do
> DHCP for those customers.  With the advent of IPV6, ip addresses should
> get cheaper.  As far as arguing that you can only put 255 people on
> a /24 and that this isn't profitable, we are talking about DSL customers
> or cable customers that are always supposed to have access.  If you only
> have 1 subnet of 255 hosts and more than that many customers, say three
> times as many, probably only a third of your customer can use the
> service simultaneously.  Considering people tend
> to want access at the same time, 66% on average are probably going to be
> angry when they get blocked.  There used to be dial-up ISP's that hit
> 13:1 ratios for people trying to get on.  People don't expect a
> broadband experience to be like a dial-up one.  Besides that, there
> probably aren't any dial-up ISP's that are that bad anymore.


I was referring to the fact that if you are using routed versus bridged
subnets on a /24 that you'd be looking at a total of 63 static customers
which his a waste of IP space IMHO unless they are paying a premium for the
service. Its entirely feasible to do bridged /24 static subnets as well.
There shouldn't ever be contention on a DHCP broadband network. You can
assign /23 or even larger if your customer base in that large.



The average DSL customer pays a minimum of $25/month.  That is $1575
> gross from 255 paying customers each month.  Now what does the OC-3
> feeding these people cost?  How much is lost to taxes?  $50+/month is
> common for bridged customers with a subnet that have decent bandwidth.
> The fees to ARIN, not an issue for ISP's because they already bridge
> customers without doing dhcp and charge the customer for it in the
> process.
>
> Dynamic assignment of ip addresses only means you can serve more
> customers if you are lucky enough to find people that are willing to
> time share.  Considering that most people want Net access at the same
> time, this is one of the main reasons why always on broadband was
> invented.
>
> Why do you have to do radius etcetera if you trust the physical lines
> your customers are coming in on?  Let's look at Opus interactive
> for a moment, what comes out of the modems of their St. Helens customers
> that constitutes authentication information?  They connect to an ATM
> network, but does that network require any authentication or is it
> statically set up?  I remember having to put two fixed numbers into my
> modem for service in Scappoose.  Seems to me that you can offer dhcp to
> the right person by putting a custom configured instance on the correct
> physical segment.  The only problem I see is that the ATM network is
> probably run through a dumb concentrator/bridge causing all the
> information about which segment traffic is coming from to be lost.


You can do it without authentication. The company I work for has a PPPoE
product (which I detest but have to support) so I had authentication on the
brain when I wrote the earlier email. I think authenticated user sessions
are better IMHO because you have documentation on usage as well as
information you might need in the case of a MPAA or RIAA notice if the
company were to take them seriously.



Right now I am going through servers on static ip addresses connected to
> bridged DSL.  I guess Opus just plain trusts us.  There is no dhcp to
> get onto the subnet.  I wonder if I'm still the only bridged DSL
> customer in Scappoose or if others have gone this route?
>
> I have a hard time with the notion that you can't have all of your
> DSL or cable customers on static subnets because of profit margins.
> I also have a hard time with the notion that ISP's even necessarily
> use authentication.  I wish Opus would require authentication for
> it's smtp service and I wish it would offer encrypted imap sessions.
>
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