I have 3 routers that are to be directly connected using a fast Ethernet connection. Sensitive data will need to be communicated via these links.

I know that if this was a serial link then i would be able to use PPP encapsulation process with CHAP. But what are my options for a fast Ethernet connection?

  • What are the router models?
    – Ron Maupin
    Commented Jul 27, 2016 at 15:06
  • Cisco 2811 routers
    – JBoH
    Commented Jul 27, 2016 at 15:07
  • If you have the security license, you could use encryption. By the way, CHAP doesn't actually encrypt data on the PPP link. Also, you can use PPPoE on Cisco routers.
    – Ron Maupin
    Commented Jul 27, 2016 at 15:13
  • What sort of encryption? (sorry i am just a newbie)
    – JBoH
    Commented Jul 27, 2016 at 15:18
  • 1
    In what way is the data "sensitive"? I worked on a network for the US DoD that carried Top Secret information of the US (and allies) military. If you need that level it would be hard to describe in this forum, but I assume it's somewhat less than that. Also, what is the physical connection like? If the Ethernet they communicate on is all on your premises, there's one set of solutions, but if there are connections off premise, then there's a whole different class.
    – MAP
    Commented Jul 27, 2016 at 19:30

2 Answers 2



IPSec Tunnel. You need to verify that your routers have a security feature set, or VPN capability. If they do, IPSec VPN is the tried and true method for doing this.


For anything sensitive, make sure you use ssh.

ssh keygen
ssh-copy-id -i (remote)

in both directions.

then you can use scp for encrypted transfers.

For Windows you can use WinSCP. Get the PuTTY suite and look in the directory and you will find it.

This makes it simple because it can run both as scripts and as tasks. Once you exchange public keys it will not prompt you for a password.

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