Allow VPN PPTP Traffic through Cisco ASA

To allow VPN PPTP traffic through your Cisco ASA, use inspect pptp.

asa# conf t
asa(config)# policy-map global_policy
asa(config-pmap)#  class inspection_default
asa(config-pmap-c)# inspect pptp 
asa(config-pmap-c)# exit
asa(config-pmap)# exit
asa(config)# exit