RE: Dynamic IP...

["Doktor Faustus" <faustus@telusplanet.net>]

Thanks for the suggestion.  That would work except that my ISP allows only
one IP at a time unless you pay extra.  I have gotten around the problem
using a modified version of the ezipupdate perl script that I found on
Packetstorm.  The script uses some shady techniques to force a different IP
(don't ask me what) but seems to work fine with the DHCP server.  My IP now
changes once every day ;)

-----Original Message-----
From: sebastion@irelandmail.com [mailto:sebastion@irelandmail.com]
Sent: Wednesday, February 21, 2001 11:21 AM
To: Doktor Faustus; misc@openbsd.org
Subject: Re: Dynamic IP...


As Seth and Rod already said, bringing down your ethernet interface
for an hour will (probably, depending on your ISP's usage) assign a
new ip when the interface is brought up again. This can be scripted
(ie, in cron), and is probably the solution your ISP's admin is
looking for.

That being said, I can think of some tricky ways around it ;) For
instance, if you can spare an extra ethernet card plugged into a hub
with the other card, you can (at a scripted time):

1) release the ip from card A (primary card)
2) aquire ip for card A
3) compare ip to previous ip, if different bail, if the same continue
4) release ip from card A
5) aquire ip on card B (_should_ be the same ip as released from A,
unless your ISP's dhcp server is crack. Which is their problem ;)
6) aquire ip on card A (new ip, now)
7) release ip on card B

On Thu, Feb 15, 2001 at 07:33:54AM -0700, Doktor Faustus wrote:
> Is there a way to get it to assign a different IP every time the lease
> expires?  A security minion from my ISP has contacted me, threatening to
cut
> off my DSL service if my IP doesn't change soon.  It would be easier to
just
> comply than to explain.  Also, I think this may pose a problem to anyone
> using a dynamic DNS service such as dyndns.org.  If I remember correctly,
> they boot you off thier service if your IP stays the same for more than 30
> days.
>
> Thank you all for your help.