Ubuntu

How can i establish communication between two machines using IPSec in linux?? Do you have any materials or regarding links? or any materials of udp socket programming?

Richard Stevens wrote a wonderful book on UNIX network programming; well worth the money. When I bought my copy there was only one volume, now there are two:

Amazon.com: Unix Network Programming, Volume 1: The Sockets Networking API (3rd Edition) (0076092025917): W. Richard Stevens, Bill Fenner, Andrew M. Rudoff: Books

I don't know if he covers IPSEC in the latest editions, but they certainly cover UDP socket programming.

thanks.
you think is there any tools instead of programming?

I guess it depends on what your goal is. When someone says 'UDP or socket programming' I take that to mean that they are writing code and that process will need to communicate with one or more other processes using UDP or TCP over IP. If this is the case, then you might look at Zero MQ (0MQ) as it is a library that can make some things easier. I don't use it, but a coworker of mine has made extensive use of it and swears by it. You'll still need to understand scoket and UDP programming.

The Intelligent Transport Layer - zeromq


If you're looking to do something else (other than writing programmes which need to communicate), then please post what it is -- it's difficult to make suggestions without any information on what you are trying to actually do.

Actually I want to do the project by title of " security in the internet compare with DMP" . Regarding this , I need to establish communication between two machines using IPSec.
I don't have any more idea of UDPsocket and IPsec in details. I think first of all I have to be introduce: regarding resources and then method or tools to perform them
//sorry for my bad english //

thank u
Elina

---------- Post updated at 06:03 PM ---------- Previous update was at 05:56 PM ----------

Actally I wanna do my project "security in the internet compare with DMP" that regarding this topic I need to establish communication between two machines using IPsec. So i need to config and implementing UDP socket.
I think because i dont have any more idea about Sockets and IPsec in details , first of all I have to be introduce of regarding resources ,then available tools or software to implement instead of programming.

thanks
(sorry for my bad english)

You might have a look at this page for some general information:

IPsec protocols

Setting up a tunnel between two hosts with ssh might be all you need. Have a read over the man page for ssh too.