Very Computer

by **Fred** » Sat, 08 Feb 1997 04:00:00

I work in two states, and have 3 static IPs assigned to computers that
travel with me. I would like to use these machines with their static
addresses when they're not physically connected to company (class c)
network via ISP assigning dynamic IP.
Any and all help is appreciated.

PLEASE reply via email too.

by **Dr Bill C Rieme** » Mon, 10 Feb 1997 04:00:00

>I work in two states, and have 3 static IPs assigned to computers that
>travel with me. I would like to use these machines with their static
>addresses when they're not physically connected to company (class c)
>network via ISP assigning dynamic IP.
>Any and all help is appreciated.

Hmmm. Static IP's are so obsolete. It is hard to believe people still
want them. It would be about equivalent to always wanted to use the
same frequency with your cellular phone. In the end, what you really
want in most cases is just the same phone number where-ever you go. Like
wise, with your computer, it doesn't really matter what IP number gets
assigned. All you really want is to be able to reach your computer by
the same name. Unless you are still hard wiring IP addresses into an
/etc/hosts file. (yuck)

OK. Now that I'm done with my editorial, I'll get back to answering your
question. To keep the same ISP, you must be connected to the routers
which are registered to handle those IP's. So if establish a PPP connection
to the relevant machine you can use your static IP. Otherwise, to the rest
of the world, you'll look like someone forging your IP address. (This can
be done, but isn't very effective since most routers will block you routing
requests.) Of course, you can use other means to establish a connection
with your router. PPP is only one example.

Now, if all you really want to be able to do is have people reach your machine
anywhere in the world, then all you need to do is create a name server record
for your machine with a regularly expiring address record. Then once you
connect to the network, you can have a script automatically update the record
on your name sever. Currently, I do this with my 'ip-up' script. Of course
this requires having a DNS server where you are allowed to update the
records...

Bill

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Very Computer

Using my static IP via dynamic connection

Using my static IP via dynamic connection

Using my static IP via dynamic connection