You actually need TWO static addresses, but they're in different
scopes and come from different places, and get applied to different
interfaces.

  Your router is not just routing, but is doing NAT (Network Address
Translation) between your local private submet, and a public Internet
address.
  For port forwarding to work, your iPad needs a static address on the
private subnet, and the DHCP reservation approach I described provides
that.
  I'm not familiar specifically with vpnbook, but it sound rather as if
it needs your public address to also be static.  By default, your router
probably gets its public address from your ISP via DHCP, and if you need
a static public address then your ISP is who you need to get it from --
typically they won't do reservations and so you'll need to configure the
address/mask/gateway they specify on the "WAN" interface of your router.

David Gillett
CCNP CISSP

-------- Original Message --------
Subject: [PCBUILD] dhcp static ip
From: Jacob Smith <[log in to unmask]>
Date: Sun, December 15, 2013 10:31 am
To: [log in to unmask]

I'm trying to set up vpn for my iPad with vpnbook.com. I've been trying
to
give my iPad a static IP, so that I can enable port forwarding
once-and-for-all. Whatever I set the IP address to, it can't seem to
connect. Is this one of those "IP conflicts" I've heard about? What can
I
do? The router is a linksys e1500.

-- 
 Blessings,
Jacob Smith

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