One of my costumers is connected to my Internet network (im an isp), the costumer is using dynamic nat, and on the other end, there is a PPTP server (on a hosted environment), the costumer complains that sometimes can´t connect throught the pptp tunnel, but i always see the TCP port 173, and after that, the GRE session..but the problem is that the costumer can´t make it works..
As an example, this is a snapshot of the nat translation:
ADVERTISING#sh ip nat translations | i 148.244.244
gre <IP_ADDRESS_OUTSIDE>:9 192.168.1.143:256 <PPTP_IP_ADDRESS>:256 <PPTP_IP_ADDRESS>:9
As you can see, there is NAT on the CPE in order to change the 192.168.1.x IP to a public ip address (source to the PPTP Server), on the server side, there is another NAT in order to have a public ip address <PPTP_IP_ADDRESS>..
This is the debug attached..
Does anyone have an idea what can be happening??im new about pptp...thank you very much in advice!
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