RE: FW: The worst abuse e-mail ever, sverige.net

["Sean Crandall" <sean () megapath net>]

> -----Original Message-----
> From: owner-nanog () merit edu [mailto:owner-nanog () merit edu] On 
> Behalf Of Mikael Abrahamsson
> Sent: Tuesday, September 21, 2004 1:01 PM
>
> As I said, this is DSL, which to me implies always on. Each DSLAM port
> only allows one IP address, this is set statically. The customer has a
> static IP address assigned to him/her, which never changes 
> over time. No
> DHCP, nothing dynamic what so ever. If you want to make yourself
> unreachable to one of our customers you blacklist their IP 
> which is always
> the same. Simple.

We configure our DSL customers the same way you do.  Static PVC, Static
IP.  Each user has a static IP and in 99% of the cases, we do not assign
any dynamic IPs.  

However, I would say that it is safe to say that the majority of the
ILECs here in the US provide DSL service where the IP is dynamic.  Most
of the time, it doesn't change, but it is very possible that the next
time that the user logs in (most are also using PPPoE for the connection
setup) that the DHCP server might give them another IP.

As such, when we have seen our IP blocks get blocked strictly because of
the rDNS entry having 'dsl' in it, a simple email to the admins
explaining that we are not providing dynamic services has gotten our
rDNS entries taken off of the blacklist.

-Sean

Sean P. Crandall
VP Engineering Operations
MegaPath Networks Inc.
6691 Owens Drive
Pleasanton, CA  94588
(925) 201-2530 (office)
(925) 201-2550 (fax)