Solution manager Remote Connection issues

Hi
I'm currently in the process of setting up Solution Manager 7.1 on windows Server 2008r2 using central system.
I did the prerequisite check & the Solman installation and i'm actuallly working on the post-installation steps.
I'm experiencing difficulty with the step : "Configure Remote Connection to SAP".
I followed the informations provided on :   http://service.sap.com/remoteconnection
In the technical prerequesite you have to set up a connection to sap support.
So i have to choose a connection type : I selected Internet connection so my first question is : do we need "VPN with SNC" or "VPN OR SNC" ?
I personnaly understood VPN or SNC.
So from here i decided to use SNC.
The first step was to set up & configure the SAProuter. I decided to do it on an another computer on the same domain ( not on the same computer where Solution Manager is installed ) but i'm not sure it is necesary
I assume I can install Saprouter on the same location as the Solution manager? do you recommend it ?
The Basic Functions testing with niping is working.
The next step is : "establish Internet Connections"
So now i can choose between SNC or VPN : my goal is to establish the connection as fast as possible.
I actually don't have a switch available ( i can get one if necesary but time is running ... ) so i'm opting for the SNC solution.
I tryed to get the certificate for the saprouter but i don't have a register SAProuter, but when i opened a customer messager for component  XX-SER-NET, SAP answered about the impossibility to access SAP service Backbone with an SNC , saying that i will need to register a VPN site to site connection to SAP => i don't get it .... Can someone explain it to me ?
So please can one of you guru's tell me how to set this remote connection :
-which materials ( server / switch / firewalls ) ?
-where to get the right documentation ?
-What about DMZ ?
-I have a single IP Address is that enough ? ( setting up nat for port  3299 )
- do i have to contact a service provider ?
My idea was initially to set up the SAProuter on the same computer as the SOLMAN setup & use SNC communication  to communicate with SAP but it doesn't seems that easy. Do i need separate installation for Saprouter <=> Solution Manager. ?
What's the minimal infrastructure to establish this connection ?
In addition to that, after configuring the SAProuter, i had trouble with the SAPMMC : on my system , on the instance 0 , the process disp+work.EXE  won't run ( yellow light )and i can't find where i made a mistake if you have suggestions ...
Really need your help, i'm on a short deadline ... Any help, even incomplete, would be appreciated.
Thanks a lot.

Thx for the answer.
I actually managed to register my saprouter with SAP and was granted with CN/OU & connection informations.
I followed this guide : http://service.sap.com/saprouter-sncdoc  with the addition of this guide : http://wiki.sdn.sap.com/wiki/display/Basis/SAProuterviaSNC.
My first issue : I'm running with a Windows server 2008 r2 enterprise edition 64 bits with a processor Intel Xeon 2.4ghz ( dualcore). so i decided to use the crypto folder "nt-x86_64"
For the environment variable i set as System variables SECUDIR = C:\usr\sap\saprouter and SNC_LIB = C:\usr\sap\saprouter\nt-x86_64\sapcrypto.dll 
The generation/install of the certificate is alright ( sapgenpse get_my_name -v -n Issuer is OK )
using the command :saprouter -r -K "p:CN=mycn, OU=myOUnbr, OU=SAProuter, O=SAP, C=DE" i have
I get the following message :  trc file     dev_rout
                                                no ligging active
Its strange cause it looks like its running but when i check the services running on windows saprouter isn't started .... How to know if SAProuter is running right ?
If i folow the SAP procedure : Step 3 : test of the ip connection by the customer : SAP Remote Services : technical preparation ( see SAP Note 812386 ) : it's ask in the note to implement note 766505 via SNOTE : i get the following error msg : Error in remote connection to destination SAPOSS : Error when opening an RFC connection ( LB: Hostname or service of the message server unknown#DEST = SA
What's wrong ?
If i use T oss1 in parameter => technical setting => i set my saprouter info in SAProuter 1 ( at customer site ) with instance no. 99 and if SAProuter and SAPNet Message Server at SAP i put the following : Name : sapserv2 / IP Address 194.39.131.34 intance no. 99 and message server name oss001/ DB Name 001/ Instance no.01.
When trying to "Logon to SAPNet"  i have an error Unable to connect to SAPNet message server ( default connection will be used ... ) 
and followed by the error screen : "partner '80.15.173.168:sapdp99' not reached WSAECONNREFUSED : Connection refused. do you want to see the detailed error description ? "
Details : module nixxi.cpp / line 3286 / Method : NipConnect2:80.15.173.168:3299 / Return code : -10 / System call : connect / Error No : 10061 / Error Text WSAECONNREFUSED: Connection refused / Counter : 10
Any idea ?
when doing niping.exe -c -H /H/mylocalSR/H/194.39.131.34/H/194/39.131.34 i obtain :
Wed Dec 07 21:20:09 2011
connect to server o.k
Wed Dec 07 21:20:09 2011
send and receive 10 messages (len 1000)
times -
avg   122.148 ms
max   193.731 ms
min   81.564 ms
tr 15.990 kB/s
excluding max and min :
av2   118.273 ms
tr2   16.514 kB/s
Is it the expected output ?
I've maintained system data in service.sap.com/system-data ( selecting the sap router ) then i tryed to use the SAP service connection, downloaded the .exe but i can't find the stfk.oez. I realized that in my maintain connection screen i have no space for entering any routestring. Seems wrong ?
Do i have to use the SAO?
i've made nat redirection from my router as this : from my public ip to my lan ip ( 192.168.x.x) what should i enter in the routestring : /H/public or lan or hostname ?/S/3299 ?
Hoping you can help me ! ( the goal of all this is to set up RFC connection for postinst step of Solution manager ).
Edited by: BLANCHARD Guillaume on Dec 7, 2011 10:47 PM

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