Question : Problem: How to setup VPN on Cisco 827 Router?

I have a Cisco 827 router. Recently I have been asked to setup vpn on it. I am not very familar with it. Would be great if anyone can provides some help. Thankls.

Answer : Problem: How to setup VPN on Cisco 827 Router?

Do you know if you need to set up IKE or Mankey tunnels?  Here's a basic set up I use for ike tunnels using gre

crypto isakmp policy 1
 encr 3des
 authentication pre-share
!
crypto isakmp key address

crypto ipsec transform-set esp-3des esp-md5-hmac
!
crypto map VPN 1 ipsec-isakmp
 set peer
 set transform-set
 match address
!
!
interface Tunnel1
 description
 ip unnumbered
 no ip route-cache
 no ip mroute-cache
 keepalive 10 3
 tunnel source
 tunnel destination
 crypto map VPN
!
!
access-list permit gre host host

****
or without gre

crypto isakmp policy 2  (create your own policy)
 encr 3des
 hash md5
 authentication pre-share
 lifetime 28800
!
crypto isakmp key address
!
crypto map VPN 100 ipsec-isakmp
 description
 set peer
 set security-association lifetime seconds 28800
 set transform-set
 match address
!
ip access-list extended
 permit ip
!