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I want to place a VPN beetween home and school because I do not trust the network down there.

If I configure the VPN server with NAT-T (nat-traversal) and configure my router to foward UDP 20 -> UDP 500 && UDP 21 -> 4500 (I also configure the client to use UDP 20 for IKE and 21 for NAT-t) will the configuration works?

And is IKE mandatory in order to ipsec to function?

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I think you're going to have a hard time convincing people here to help you subvert rules that your school has put in place. Keep in mind that many of the people here are the exact ones that are tasked with implementing and enforcing compliance with such rules. – EEAA Oct 11 '10 at 20:40
...additionally...not that I agree with such rules. On the contrary, I think they're ridiculous for the most part. – EEAA Oct 11 '10 at 20:41
Um ok I see.... – Gopoi Oct 11 '10 at 22:36
And I do not break any law and any contract with them. They every port else than FTP, SSH, TELNET, IMAP, SMTP. Also they block ssl other than in http. – Gopoi Oct 11 '10 at 22:38
up vote 0 down vote accepted

So I tried to change the port and all worked well.

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