Feature Request: GRE NAT Tracking (PPTP)

RouterOS General
1

As of 5.8, it appears that Conntrack and SNAT are unable to track multiple GRE tunnels to the same host. This problem manifests is self as multiple users behind a MikroTik NAT router are unable to PPTP VPN into the same remote server.

more information is available in this thread:
http://forum.mikrotik.com/t/mikrotik-mikrotik-pptp-problem/51730/1

Additionally the netfilter mailing list has a lot of discussion about this topic when they introduced the nf_conntrack_pptp module

mikrotik -> mikrotik pptp problem
[solved] PPTP passthrough
2

Such feature already exist.

/ip firewall service-port enable pptp
3

I thought I had that enabled during my testing. I will go back and try it again. Thank you.