On the bright side since there are so many types of client-side VPN's I am pretty sure that do not need to make one for my needs. The target platform is an old 1.5 Ghz intel box that I pumped up with 2 GB of DDR2 ram, mirrored 100 GB hard drive and 2 Gigabit Nic's. Since it is necessary to run this on older linux hardware from what I can tell, the server should be IPSec as opposed to an SSLVPN hotness. If someone can add more detail to the parts that are necessary for an IPSec vpn server please feel free to contribute. The parts I plan to use generic modules for (and create adapters for) are the Cryptographic Algorythms (AES preferably although it appears that windows like DES / 3DES - Noobs) Oakley key generation (for IKE and ISAKMP).You should run the ForwardServer class with specific program arguments:-handshakeport2206 -usercertcerts/server.pem -cacertcerts/CA.pem -keycerts/serverprivatekey. In order to run the VPN you need to run the ForwardServer class.

Something for Internet Security Association and Key Management Protocol (ISAKMP) Virtual Private Network software built with Java using OpenSSL.

Method for creating IPSec Encapsulating Security Payload (ESP).

Method for creating IPSec Authentication Header (AH).I know there are many out of the box and even open source ones, but unfortunately even though I know several web programming languages the C code examples I have seen is not documented/structured in such a way that I can understand it. Here are 71 public repositories matching this topic. Can someone point me to a skeleton of writing this sort of server? A virtual private network (VPN) extends a private network across a public network and enables users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network. From a programming standpoint it appears to me a VPN server is just a pass-through proxy that encrypts traffic from the client, and decrypts it on the server. I have decided to write my own light weight VPN server in Java.

Vpn project in java with source code