Ipremap is terrible NAT kludge.
You can use Ipremap to dynamically add DNAT rules to a given iptables chain with optional rule removal after a given time-to-live.
A simple use-case is letting applications influence fwmark routing
at will. Your application may remap the IP it wants to connect into a
private range, e.g. 10.19.0.0/16 and connect to the remapped IP. You
can use iptables rule add the desired mark to the packets going to
the remapped IP. The DNAT rule added by Ipremap will then direct the
traffic to its original destination.
It is generally not advised to use Ipremap.
For now, if you really want to create a routing mess, look at
ipremapd.cc for configuration possibilities and ipremap.c for an
example client. Someday a proper user interface may be added.
Copyright (C) 2014 Kristof Marussy kris7topher@gmail.com
Ipremap is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
Ipremap is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with Ipremap. If not, see http://www.gnu.org/licenses/.