What are IPsec tunnels?

Question

Information Security

I apologize for such a stupid question, can someone explain in detail what IPsec tunnels are, what their number affects, etc...

Answer 1

Wow stupid.. Decent question.
IPsec is the Layer 3 network layer of the OSI (Reference/GOST) network stack model.
It is responsible for determining the smaller route and constructing logical addresses.
For clarity, I'm stealing a table from the wiki:
The OSI model, which is used in TCP / IP, checks the incoming data. Actually encapsulation transfers data from (1) level and higher in the hierarchy.
Directly, IPsec is a protocol that is something in between the lower levels (where the choice of interactions is simple and easy for applications to understand, but the choice of a specific protocol is required) and the upper ones, and the same IPsec is used in the well-known protocol of this level - IP. In general, we decided to use it as a universal tool for organizing a secure channel connection.
A little about tunneling.
IPsec works here and there) In connections like l2tp, because he acts as a "route-builder" he directs and we successfully connect to our private network.
Either does the job in tunnel mode . In this option, it encrypts all outgoing packets and encapsulates them in the data of a new packet.
Actually in tunnel mode, a VPN connection occurs, more precisely, as mentioned above, it directs, encrypts, and encapsulates.
ps in fact, as I started to paint, I realized that it is not so easy to explain specifically the meaning and interactions ... a huge number of "buts" and "ifs" ...
Sorry, self-taught, I learned all these secrets without Google / Wikipedia to that- well...

Answer 2

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