VPN and IPtables

[James Knott]

Zbigniew Koziol wrote:
> Isnt VPN using a protocol gre ? I had the problem with openBSD working 
> as a firewall. openBSD by default does not allow to use gre protocol 
> (Windows does). Linux probably does not either.

GRE is one method of implementing a VPN, but not the only one.  Also, 
GRE is available for Linux.
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