Here is an easy way to make use of IPv4 GRE tunnels in Ubuntu, or any other Debian based distro. You will need to edit /etc/network/interfaces. Here is a template with the information you will need to add: auto tun1 iface tun1 inet static address <tunnel IP> netmask <tunnel subnet mask> pre-up iptunnel add tun1 mode…
Tag: Routing
GRE between Vyatta Core & pfSense
Below i show the config for Vyatta Core and pfSense configuration details, in order to create a GRE Tunnel between two sites. Vyatta Core Configuration: vyatta@vyatta1-site1:~$ show configuration interfaces { ethernet eth0 { address 192.168.1.1/24 duplex auto hw-id 00:0c:29:00:a3:d7 smp_affinity auto speed auto } ethernet eth1 { address dhcp duplex auto hw-id 00:0c:29:00:a3:e1 smp_affinity auto…