<div>
If you tell us the reason you'd want to do this and the application, maybe we can suggest a workaround.
</div>


If you tell us the reason you'd want to do this and the application, maybe we can suggest a workaround.

<div>
I've recently moved to an MPLS solution for Phones and Internet where the provider manages firewall duties. I could eliminate the 2811 entirely except that the VPN is less expensive than the providers'. Now I have no WAN connection directly to the router. I'd still like to run the VPN however. The only way ( if possible) I could see to do this is to use a separate public IP NAT'd to an internal subnet and attached to FE0/1 than use FE0/0 connected to internal network with VPN running in between. Unfortunately even allowing for firewall ports opened for CISCO VPN, I'm still unable to connect. Now wondering if I can even do such a trick...
</div>


I've recently moved to an MPLS solution for Phones and Internet where the provider manages firewall duties. I could eliminate the 2811 entirely except that the VPN is less expensive than the providers'. Now I have no WAN connection directly to the router. I'd still like to run the VPN however. The only way ( if possible) I could see to do this is to use a separate public IP NAT'd to an internal subnet and attached to FE0/1 than use FE0/0 connected to internal network with VPN running in between. Unfortunately even allowing for firewall ports opened for CISCO VPN, I'm still unable to connect. Now wondering if I can even do such a trick...

<div>
<div class="content wysiwyg-content">
Does anyone know if I can configure the VPN server between the two built-in ethernet ports?<br />
Is there a design/hardware reason why this can't be done?
</div>
</div>


Does anyone know if I can configure the VPN server between the two built-in ethernet ports?
Is there a design/hardware reason why this can't be done?

Vpn on Cisco 2811

A virtual private network (VPN) is a network that uses a public telecommunication infrastructure, such as the Internet, to provide remote offices or travelling users access to a central organizational network securely. VPNs encapsulate data transfers using secure cryptographic methods and other security mechanisms to ensure that only authorized users can access the network and that the data cannot be intercepted.

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.

Routers

Internet Protocol Security (IPsec) is a protocol suite for secure Internet Protocol (IP) communications by authenticating and encrypting each IP packet of a communication session. IPsec includes protocols for establishing mutual authentication between agents at the beginning of the session and negotiation of cryptographic keys to be used during the session. IPsec can be used in protecting data flows between a pair of hosts (host-to-host), between a pair of security gateways (network-to-network), or between a security gateway and a host (network-to-host). IPsec is an end-to-end security scheme operating in the Internet Layer of the Internet Protocol Suite.