IPSEC

[lovefunlove]

Hello Guys ,

I have a 1721 router with only 1 default Ethernet port.Due to a particular network scenario i am not using my serial for WAN.I am using my one Ethernet port for both my lan and wan by giving secondary IP.

I want to know that can we configure IPSEC on this router by having same incomming and outgoing port(my Ethernet). and also without using any loopback.

Waiting for your expert comments .

Regards,

Max

[Tim Smith]

Hi Max,

Have you got a spare WIC slot?

I would suggest putting in a WIC-1ENET if possible.

Otherwise your WAN traffic comes across the same layer 2 network.

If you have no slots, you could use VLANs but that is not really a nice option either.

Cheers,

Tim.

[r.fang]

Yes, you can single Ethernet interfac to achieve this.

I have same configuration scenario at our production network. we also put GRE tunnel on top of IPSec.