In this post I will try to show how I configured an SRX NAT device to forward PPTP connection.
Please read the entire post without applying any configuration as the first part of this post
does contain some mistakes:)
As you can see in the topology for this, I have used my SRX device (SRX100 12.1X44-D20.3)
in between an XP VPN client and a RRAS server on Windows2008. I must admit that it
was a pain to install/configure RRAS on 2008 server. After I disabled IPV6, everything
messed up and I had to remove/install interfaces again.
A PPTP connection requires two things;
1) TCP port 1723 for control path
2) GRE for data path