Set up FreeNX with LXDE on Arch Linux

1. install poptop server

pacman -S pptpd

2. edit the configuration file

vim /etc/pptpd.conf
--

option /etc/ppp/pptpd-options
localip 172.16.1.254
remoteip 172.16.1.1-253

localip is ip of pptp server
remoteip is the ip range which vpn client will get from

3. edit /etc/ppp/pptpd-options

name pptpd
refuse-pap
refuse-chap
refuse-mschap
require-mschap-v2
require-mppe-128
proxyarp
lock
nobsdcomp
novj
novjccomp
nologfd
ms-dns 168.95.1.1
ms-dns 168.95.192.1

require-mppe-128 enables encryption
ms-dns is dns server address

4. start pptp server

/etc/rc.d/pptpd start

5. add username and password to /etc/ppp/chap-secrets for ppp authentication

<username>     pptpd     <password>   *

6. make your iphone be a pptp client, General -> Network -> VPN -> Add a VPN -> PPTP
then fill all required fields and save

7. turn on VPN then you'll see the timer start timing