Dear Ioannis,
Thank you for reaching the Small Business Support Community.
On the RV042 you have a few VPN setup configuration options; Gateway to Gateway VPN, remote access or Client Gateway VPN and PPTP Server VPN, if you would like to know how to go about the configuration steps I suggest you to look a the chapter 9 of the admin guide;
http://www.cisco.com/en/US/docs/routers/csbr/rv0xx/administration/guide/rv0xx_AG_78-19576.pdf
For configuration options and guidelines on the 2811, I suggest you to inquire about it on the"WAN, Routing and Switching" support forum since it is not considered a Small Business device but an Enterprise one running Cisco IOS;
https://supportforums.cisco.com/community/netpro/network-infrastructure/routing
Please do not hesitate to reach me back if there is any further assistance I may help you with.
Kind regards,
Jeffrey Rodriguez S. .:|:.:|:.
Cisco Customer Support Engineer
*Please rate the Post so other will know when an answer has been found.
Jeffrey Rodriguez S. .:|:.:|:.
Cisco Customer Support Engineer
*Please rate the Post so other will know when an answer has been found.