Using DMVPN with Linux

DMVPN is a very intelligent combination of IPsec, GRE and NHRP. Many Thanks to the Guys at Cisco, Christoph, Frederick and all other. This week i discovered “opennhrp” on sourceforge. It took me a minute or two to have a VM with debian up and the needed tools installed. I used VMWare with a bridged … Continue reading →

Dynamic Multipoint VPN example

Ever wonder how to provision several hundreds of VPNs from remote offices with dynamic IP to a central site with minimal configuration? Cisco offer an elegant solution called Dynamic Multipoint VPN. With DMVPN the central site does not need to know the remote site IP in advance, it will learn it via NHRP protocol when … Continue reading →

OpenNHRP

OpenNHRP implements NBMA Next Hop Resolution Protocol (as defined in RFC 2332). It makes it possible to create dynamic multipoint VPN Linux router using NHRP, GRE and IPsec. It aims to be Cisco DMVPN compatible. Download