Do most NAT device support protocol 41?
And in which way it deal with when it receive such a packet?
THX!!!
You'd have to check your devices documentation, or their website for specs. Please note you only have to post once, if someone can answer, they will. Also, when you ask a question, please provide specific details, that way you can get better responses. No one likes to guess based on lack of information, thanks.
Should also try searching the forums:
http://www.tunnelbroker.net/forums/index.php?topic=27.0