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Shark Attack

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VPN L2L

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?
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rharland2009

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.
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ASKER

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
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?
yep, 2811
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rharland2009

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