at first i do what is in this guide
http://freehostinganswers.com/blog/h...at-and-ubuntu/

Add the following iptable rules:

iptables -t nat -A PREROUTING -d x.x.x.x -p tcp --dport 81 -j DNAT --to x.4.252.69
iptables -t nat -A PREROUTING -d x.x.x.x -p tcp --dport 3460 -j DNAT --to x.4.252.69

where x.x.x.x is IP address of your public server. (dont forget to change the "x" with proper number in the x.4.252.69)

now i cant access my server from my ip iam waiting softlayer to answer me why lol

?

One thing... the localip and the remoteip (pptpd.conf) should be IP addresses from private range e.g.:
localip 10.10.10.2
remoteip 10.10.10.1

Does that goes for your case?

btw, I hope you did not set the public ip of your PC as a remoteip.

my laptop ip is x.4.252.69
my server ip is x.173.180.202

hahaha i did that sorry i didnt understand this step very well

Oh, no

You made a common mistake in pptpd.conf

find the place in pptpd.conf where the localip/remoteip are specified and edit it to be like this:

localip 10.10.10.2
remoteip 10.10.10.1

Then when you get access to your server again, add the following iptables rules:

iptables -t nat -A PREROUTING -d x.173.180.202 -p tcp --dport 81 -j DNAT --to 10.10.10.1
iptables -t nat -A PREROUTING -d x.173.180.202 -p tcp --dport 3460 -j DNAT --to 10.10.10.1

ok i edited thanks
i can access it through free vpn
but i cant access from my ip i dont know why but i put ticket for softlayer.com
waiting them to finish so that i can test with these rules

how i can disconnect ppp0
??? vpn account connected to the server

i solved the problem /etc/init.d/pptpd restart-kill
that because i put my ip in remote ip lol
the softlayer still searching for the problem :P

you are my super man
i love you man
thanks alot

if i make more than 1 vpn account
all of them will take 10.10.10.1
so that i can put
remoteip 10.10.10.1-200

right ?

and in iptables
iptables -t nat -A PREROUTING -d 184.173.180.202 -p tcp --dport 82 -j DNAT --to 10.10.10.1-200
??

No, wait.

You can remove the last added iptables rules.

First enter this:

iptables -t nat -L --line-numbers

you should get something like this:

Chain PREROUTING (policy ACCEPT)
num target prot opt source destination
1 DNAT tcp -- anywhere landings.nyc.trafficz.com tcp dpt:81 to:10.10.10.1

Notify "1" under below the "num" field. You should use that rule number (in your case it can be different) to delete the previous added rules:

Then enter:
iptables -t nat -D PREROUTING 1

where "1" is the number that you found for "destination" x.173.180.202