Posted on 2014-12-18
Last Modified: 2014-12-18
When setting up a vpn site to site tunnel, can I use the loopback interface as my interface to connect to the peer? All my interfaces are taken. If not, what other options do I have?
Question by:Shark Attack
  • 3
  • 2
LVL 11

Expert Comment

ID: 40507346
On most routers/firewalls, you can connect more than one tunnel to a single interface. For example, you might have three remote sites that connect via IPSEC VPN tunnels - and each of those will connect to the WAN interface on your device. If your loopback IP is public, then there's nothing that specifically precludes you from using that, but it depends on the type of router/firewall you're using.

Author Comment

by:Shark Attack
ID: 40507355
right, but the issue is, there needs to be a specific IP address coming from that routers interface not the one currently there and I cannot change the IP on that interface because it goes to other tunnels
LVL 11

Expert Comment

ID: 40507359
Okay, so this particular P2P tunnel needs a specific IP address on your end, which is not the currently assigned address on your WAN interface. You want to know if you can assign this particular address to your loopback and create the tunnel with that.
Is this a Cisco router?

Author Comment

by:Shark Attack
ID: 40507429
yep, 2811
LVL 11

Accepted Solution

rharland2009 earned 500 total points
ID: 40507665
In that case, you should be able to configure your tunnel using the loopback without issue. As long as it's reachable from the device at the other end of the tunnel, you're good.

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
How to use a IP block on cisco 877 3 40
Sonicwall TZ 205- Dropping Incoming E-mail as IP Spoof 13 92
Allowing Multicast in the firewall 2 42
BGP routing on Windows 2016 7 38
I've written this article to illustrate how we can implement a Dynamic Multipoint VPN (DMVPN) with both hub and spokes having a dynamically assigned non-broadcast multiple-access (NBMA) network IP (public IP). Here is the basic setup of DMVPN Pha…
Quality of Service (QoS) options are nearly endless when it comes to networks today. This article is merely one example of how it can be handled in a hub-n-spoke design using a 3-tier configuration.
After creating this article (, I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Windows 10 is mostly good. However the one thing that annoys me is how many clicks you have to do to dial a VPN connection. You have to go to settings from the start menu, (2 clicks), Network and Internet (1 click), Click VPN (another click) then fi…

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

20 Experts available now in Live!

Get 1:1 Help Now