VPN on a Windows VPS can be configured using Routing & Remote Access service but before that VPN module for the VPS need to be enabled from the host server or Main Hardware Node using following command.
After that reboot the container and user will able to enable RRAS service from within the container but while starting/enabling RRAS on a VPS it shows following Error:
As per SW-Soft/Parallels Engineers this a bug in Virtuozzo which has been fixed by the Virtuozzo Developer in Virtuozzo VZU450011 Update. This update can be installed using Virtuozzo Update Wizard (vzupdate.exe) and follow the instructions. This wizard will install all the recent Virtuozzo updates and hot-fixes in the correct sequence OR you can download and install it manually using following URL but make sure you have already installed all previous updates before installing any update manually.
You can read more about installing updates manually on Parallels KB
About Milind Koyande
Milind Koyande is the Senior Research Engineer and his job is to work with new technologies, specially Cloud Computing / Virtualization Technology. His past projects include Government Sector initiatives, Backup and Disaster Recovery Solutions.
Milind Koyande is the Senior Research Engineer and his job is to work with new technologies, specially Cloud Computing / Virtualization Technology. His past projects include Government Sector initiatives, Backup and Disaster Recovery Solutions. Follow him on 
Virtuozzo Bug FIX: Not able to enable VPN on a VPS « .:][ Gr8 Admin Team ][:.
on Apr 6th, 2010
@ 12:17 pm:
[...] RRAS on a VPS it shows following Error: Unable to load C:/WINDOWS/System32/iprtrmgr.dll. Read More Here Categories: Windows Tags: RRAS service not starting, Unable to load iprtrmgr.dll, Virtuozzo [...]
Virtuozzo Bug FIX: Not able to enable VPN on a VPS | eITWebGuru
on Apr 6th, 2010
@ 12:21 pm:
[...] Read More Here [...]
Tweets that mention Virtuozzo Bug FIX: Not able to enable VPN on a VPS | -- Topsy.com
on Apr 6th, 2010
@ 9:46 pm:
[...] This post was mentioned on Twitter by maxmk. maxmk said: Virtuozzo Bug FIX: Not able to enable VPN on a VPS: user will able to enable RRAS service from within the containe… http://bit.ly/d3DsZr [...]