Multiple ISP's on one Server

[Nifty Hat Mitch]

On Tue, Oct 05, 2004 at 06:48:00PM -0400, Sam Varshavchik wrote:
> Nifty Hat Mitch writes:
> >On Fri, Oct 01, 2004 at 09:41:46PM -0400, Sam Varshavchik wrote:
> >>Thom Paine writes:
> >>
> >>>I ran into a small problem last month in that I used over 70G of
> >>>bandwidth.
....
> >In some cases it is possible to setup routing metrics
> >so your favorite connection is used more than another.
> 
> Except that his other connection is a cablemodem ISP.
>
> Only clueless ISPs allow their retail subscribers to fling any
> packets they like.
> 
> Clueful ISP will have their border routers drop all packets that
> originate from some IP address that does not belong to the ISP.

Absolutely.

I do believe that there is a bit of incest between various providers
based on routes to and from friends of mine in this area.  It may be
that the border routers of interest are not involved (2% chance).
Such things are beyond the first order visibility of the user and they
are dynamic so I thought I would mention it.  He could find that 70GB
was used in the first night or with a config change the use spikes
six months from now.

Folks that lease lines between offices near and far need to be aware
of this.  In some cases the ISP will smile all the way to the bank as
your published routes link hither and yon for them.  In part this is
also why network security tools like ssh and vpn are so important for
businesses.


-- 
	T o m  M i t c h e l l 
	Me, I would "Rather" Not.