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Category: Cisco VPN

Cisco Site to Site GRE VPN Tunnel with EIGRP

Cisco Site to Site GRE VPN Tunnel with EIGRP

What is a GRE tunnel? Generic Routing Encapsulation (GRE) is a tunneling protocol that lets you run a routing protocol between endpoints. This example will create a GRE tunnel between two routers and will run EIGRP between the two. Topology Summary: 192.168.13.0/24 will be the Tunnel Network IP block  Router-1 lo0 10.1.1.0/24 e0/0 192.1.12.2 Router-2 lo0 10.2.2.0/24 e0/0 192.1.23.2 Router-1 interface tunnel1 ip address 192.168.13.1 255.255.255.0 tunnel source 192.1.12.1 tunnel destination 192.1.23.3 router eigrp 100 no auto-summ net 192.168.13.0 net…

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Cisco IOS Site to Site VPN

Cisco IOS Site to Site VPN

Five steps to configuring an IPSec Site to Site VPN! Configure Phase I – ISAKMP Parameters Configure Phase II – ESP Parameters Configure the interesting traffic ACL Link the above parameters to each other using a Crypto Map Apply the Crpyto Map to the outbound interface Notes: Items below between < > are meant to be replaced with a value Phase 1 parameters: pre shared key: cisco123 Peer IP:  192.1.23.3 Phase 1 encryption:  3des Phase 1 hash:  md5 Phase 1…

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