Redirect traffic through port 80

Question

My situation is as follow :

I have a client on a network where only port 80 is open. I'd like to be able to connect to a FTP (port 20 - 21) from this client.

Is there any way to redirect traffic through port 80 to pass the firewall? I was thinking of a proxy or a VPN.

If I use a proxy, is it possible to only active it for requests whose destination is a port different from 80?

If I use a VPN, does PPTP have a chance to work? I read that it uses a different Transport Layer, but I'm not sure on the impact on a firewall.

EDIT :

I have created a C2S port-forwarding rule (port 20/21) with PuTTy's Bitvise Tunnelier, to a third party computer which has these ports open (firewall, PAT).

If I try to connect to my FTP from the client in my secured network, I get these logs :

Filezilla

Status: Resolving address of ape2i.com
Status: Connecting to 5.135.164.135:21...
Error:  Connection timed out
Error:  Could not connect to server

NppFTP

-> TYPE I
Connecting
-> Quit  
Unable to connect

If I try to telnet on port 21 with PuTTY, I get this error

Network error: Connection timed out

FOLLOW UP :

I finally managed to make it work with OpenVPN.

In the "Open" network, I created a NAT/PAT rule to redirect TCP traffic from port 443 inbound to port 1194 outbound on a specific machine. On this machine, I installed my OpenVPN server and configured it to push routes on client to reroute all traffic.

push "redirect-gateway def1 bypass-dhcp"

I also bridged my virtual tunneling interface with my ethernet NIC card and assigned it a static IP address.

In the "Secure" network, I installed OpenVPN client and configured it to connect to the IP/Port of the "Open" network.

Answer 1

You need a VPN that works just with a single port 80, so FTP proxy or PPTP won't work since they use additional ports. You can try to establish a SSH-tunnel using port 80, the software putty can be used.