>> Actually it is more than possible.  Some ISDN blocks sit in the same
>>  block (/24) as dialups, albeit a different subnet mask.  When RBL
>>  lists blacklist addresses, they often don't research into the extent
>>  of the range, and just block the whole /24 range, while the dialup
>>  range stops halfway through that subnet.

> Well, then complain to your provider to get this fixed. They should
> not take IPs from dial-up pools and assigned to them fixed customers.
> With a fixed IP, you should get your own PTR record and so on, and
> this is not possible with dial-up pools.

How the ISP sets the addresses up is up the them.  Mine doesn't do it...
but I have seen some that do.  And you're wrong... the IP doesn't come from
the dial-up pool... it's a different subnet... just some RBL systems block
whole /24 class addresses, instead of investigating where the dial-up pools
go from and to.

-- 
Jonathan Angliss


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