VPN on a general plan to understand for a beginner.

Hi all

This question is not really particularly related to any Cisco VPN / Firewall product.
But I really hope to seek clarification with regard to the general operation of a tunnel VPN gurus here...

So here we go...

I understand that (the encryption side), VPN tunnels incorporates real source and destination of a packet network with the public internet address (for example the internal network) between the VPN client and the VPN server.

For example, the site has, I would have a private 192.168.10.0/24 network and I wish that connections of A site VPN clients part of the 192.168.10.0/24 network. The gateway for this network is a coreswitch L3 - 192.168.10.254 who will be roads and then to other resources/internal network.

As shown in my picture below, I have an internet router that does not support VPN, so I have to configure a different VPN behind her with a public IP address

My question is->

If there is a road to install in my VPN client with

192.168.4.0 255.255.255.0 192.168.10.254

Which means my package of 'internet' is always sent to the VPN server and the VPN server can "unpack" it and "transmit" to the IP Address of the gateway of the coreswitch - 192.168.10.254 L3?

e.g. embedded package from computer VPN client

[src] [dest] [load]

[192.168.10.50] [192.168.4.3] [icmp]

final package

[public CBC] [public dest] [software package]

[63.216.23.24] [202.202.202.10] [192.168.10.50] [192.168.4.3] [ICMP]

T1) what I wanted to say, that is, the final package is sent via the internet to the VPN (202.202.202.10) server, how does the VPN server, can continue to transfer the package to the L3 gateway then? Surely she needed a right sort of ability to transmission and routing?

In general how, the embedded package does get sent to the VPN server, then to the L3 switch-> to the desired destination 192.168.4.3?

- or - what I need to Setup/assign a separate subnet together VPN for the VPN client and the VPN server; and the gateway for VPN client for all other internal networks will be for the VPN server (and not the coreswitch L3), with the server VPN with roads to another network internal with the L3 coreswitch instead?

Kind regards
Noob

Yes.Participation in this forum is a voluntary activity and often work day will be pre-empting of quick answers.

There is 'something like' a table in a session. In fact, a set of security IPsec Associations (SAs) as the VPN device uses to keep track of the remote clients connected.

It represents for the networks being the that these customers are on the device itself (even if they are actually remote) then that traffic from VPN clients and the local subnets will never see the VPN itself as a device in the path (for example, via the output of traceroute)

Tags: Cisco Security

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