NAT Helper for FTP and PPTP

[hwinkel]

Hi,

are there any NAT Helper implementations included to support
NAT/PAT for ancient protocols like PPTP, FTP etc... Unusually found in the Kernel NAT implementations. If not, how hard can it be?

[gshimansky]

Well you need to add support for TCP streams and try to parse TCP packets to extract FTP commands that require to open a port. Currently NAT has only rudimentary notion of TCP connection to monitor when it is being closed https://github.com/intel-go/nff-go-nat/blob/master/nat/translation.go#L368. All other TCP states are not monitored.
For PPTP I don't know protocol details so I cannot advise you here.

[hwinkel]

@gshimansky thanks for the Pointer.

[torabkheslat]

@hwinkel Is there any update to this thread!?