python-vpn

VPN Server implemented in pure Python. (For Research Purposes Only)

Introduction

All VPN softwares are stupid, clumsy and hard to configure. So comes python-vpn.

• NO app install needed
• NO server configuration file
• NO network interface added
• NO iptables or "/etc" modified

Press "RETURN" to start, "CTRL+C" to stop.

QuickStart

$ pip3 install pvpn
Successfully installed pvpn-0.2.1
$ pvpn -p yourpassword
Serving on UDP :500 :4500...
^C
$ pvpn -wg 9000
Serving on UDP :500 :4500...
Serving on UDP :9000 (WIREGUARD)...
^C

Open server's UDP port :500 :4500 to your device. In device's system setting, add an "IPSec" (iOS) or "IPSec IKE PSK" (Android) node, write down the server address and password "yourpassword". Connect.

If you prefer wireguard VPN, specify "-wg (port)" parameter and open server's (port) UDP port to your device. Paste the printed server public key to wireguard client settings, write down the server address:port. Connect.

You should modify the default password "test" with a good one. See "pvpn -h" for more options.

Features

• Clean, lightweight
• IKEv1, IKEv2, L2TP auto-detection
• WireGuard
• TCP stack
• TCP/UDP tunnel
• DNS cache

Protocols

Protocol Name	Name in iOS	Name in Android	Name in MacOS	Name in Windows
L2TP PSK ✔	L2TP	"L2TP/IPSec PSK"	L2TP/IPSec	L2TP
IKEv1 PSK ✔	IPsec [1]	"IPSec Xauth PSK"	Cisco IPSec	IPSec
IKEv2 PSK ✔	IKEv2 [2]	"IPSec IKEv2 PSK"	IKEv2	IKEv2
WireGuard ✔	WireGuard App [3]

[1] Do not use certificates

[2] Turn off "user authentication"

[3] Turn off "preshared key"

Examples

• TCP Tunnel

  If the remote host match in file "rules.country", tunnel through http proxy.
  
  $ pvpn -r http://remote_server:port?rules.country

• UDP Tunnel

  Redirect all DNS requests to 8.8.8.8.
  
  $ pvpn -ur tunnel://8.8.8.8:53?{53}

Specifications

IPSec/ESP

• RFC2406 IP Encapsulating Security Payload (ESP)
• RFC3947 Negotiation of NAT-Traversal in the IKE
• RFC3948 UDP Encapsulation of IPsec ESP Packets

IKE/ISAKMP

• RFC2407 The Internet IP Security Domain of Interpretation for ISAKMP
• RFC2408 Internet Security Association and Key Management Protocol (ISAKMP)
• RFC2409 The Internet Key Exchange (IKE)
• IANA_01 Internet Key Exchange (IKE) Attributes
• IANA_02 "Magic Numbers" for ISAKMP Protocol
• DRAFT_1 The ISAKMP Configuration Method
• DRAFT_2 Extended Authentication within IKE (XAUTH)

IKEv2

• RFC7296 Internet Key Exchange Protocol Version 2 (IKEv2)
• IANA_03 Internet Key Exchange Version 2 (IKEv2) Parameters
• RFC3748 Extensible Authentication Protocol (EAP)
• RFC5106 The Extensible Authentication Protocol-Internet Key Exchange Protocol version 2 (EAP-IKEv2) Method

Diffie Hellman

• RFC3526 More Modular Exponential (MODP) Diffie-Hellman groups for Internet Key Exchange (IKE)
• RFC5903 Elliptic Curve Groups modulo a Prime (ECP Groups) for IKE and IKEv2
• RFC5114 Additional Diffie-Hellman Groups for Use with IETF Standards

L2TP

• RFC2661 Layer Two Tunneling Protocol "L2TP"
• RFC3193 Securing L2TP using IPsec
• RFC1549 PPP in HDLC Framing
• RFC1661 The Point-to-Point Protocol (PPP)
• RFC1332 The PPP Internet Protocol Control Protocol (IPCP)

WireGuard

• RFC7748 Elliptic Curves for Security
• WireGuard Protocol Specification