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You can circumvent all this trouble by using ready made solutions instead of reinventing the wheel. There are free OpenSource projects as autossh and rstunnel (reliable ssh tunnel) that address this issue.

[1] http://sourceforge.net/projects/rstunnel/ [2] http://www.harding.motd.ca/autossh/

the bob

-- http:\\www.hs-pongratz.de

I didn´t know this projects, I´ll investigate them, one question before I start, can I use this solutions on the client machine running windows?

Nope, according to projects descriptions on links mentioned above these are *nix solutions. But ipsec would be interoperable with windows >=2k. the bob -- http://www.hs-pongratz.de