These instructions show you how to install the P2PNS implementation for Linux. Compiling for Windows is currently not supported.

1. Download and install [http://www.oversim.org/ OverSim] according to the these [http://www.oversim.org/wiki/OverSimInstall install instructions].

2. Download the modified OpenSER SIP proxy [http://www.p2pns.org/chrome/site/openser-1.3.1-p2psip-20080926.tgz openser-1.3.1-p2psip-20080926.tgz] and extract in next to your !OverSim installation:
{{{
  cd ~/sim
  tar xzf /tmp/openser-1.3.1-p2psip-20080926.tgz
}}}

3. Compile and install !OpenSER:
{{{
  cd ~/sim/openser-1.3.1-p2psip
  make prefix=`pwd/install` install
}}}

4. Edit openser-1.3.1-p2psip/install/etc/openser/openser.cfg and change the following parameters:
{{{
  listen: change this to the local IP
  mpath: change this to the module path of your OpenSER installation
         (e.g. /home/user/sim/open-1.3.1-p2psip/install/lib/openser/modules/)
}}}

5. Edit !OverSim-20080919/Simulations/realworld/realdhtapp.ini and remove the bootstrap IP:
{{{
   bootstrapIP: replace the "10.6.0.1" by ""
}}}

5. Start !OverSim and click on the "FAST" button:
{{{
  cd ~/sim/OverSim
  bin/OverSim -f Simulations/realworld/realdhtapp.ini 
}}}

6. Start !OpenSER (in a new terminal):
{{{
  cd ~/sim/openser-1.3.1-p2psip
  install/sbin/openser -f install/etc/openser/openser.cfg
}}}

7. Start and configure a SIP UA of your choice (e.g. [http://www.ekiga.org/ Ekiga]):
{{{
  - Set the outgoing proxy to ''localIP'':5061
    (With Ekiga: ''Edit->Preferences->SIP Settings->Outbound Proxy''
  - Create a new SIP account with an arbitrary username and the domain ''p2p'' (e.g. alice@p2p)
    (With Ekiga: ''Edit->Accounts->Add'': Account Name and User ''alice'' and Registrar ''p2p'')
  - Register the account at the local SIP proxy
    (With Ekiga: ''Edit->Accounts'': Click the checkbox next to the account, if it's not already registered)
}}}