[Swan] ipsec tunnel between 2 hosts on same switch

[Paul Wouters]

On Thu, 16 Oct 2014, bmoyni01 at vodafone.ie wrote:

> I have the following on each machine.
>
> ipsec.conf
>
> config setup
>    protostack=netkey
>    nat_traversal=yes
>    virtual_private=%v4:10.0.0.0/8,%v4:192.168.0.0/16,%v4:172.16.0.0
> /12,%v4:25.0.0.0/8,%v4:100.64.0.0/10,%v6:fd00::/8,%v6:fe80::/10
>
> conn ipsec0
>    type=tunnel
>    authby=secret
>    auto=start
>    left=192.168.30.51
>    leftid=@left.com
>    right=192.168.30.50
>    rightid=@right.com
>
> ipsec.secrets
> %any %any : PSK "preshared key"

> 022 "ipsec0": We cannot identify ourselves with either end of this connection.

There were some startup issues with orienting and working with systemd.
Can you try this with libreswan-3.11rc4?

https://download.libreswan.org/development/


> I have read this example:
> https://libreswan.org/wiki/Host_to_host_VPN_with_PSK

> In the  Host to host VPN with PSK  example:
> 192.0.2.254/24 eth0 WEST eth1 192.1.2.23 --[internet]-- 192.1.2.45
> eth1 EAST eth0 192.0.1.254/24
> Are 192.1.2.23  and 192.1.2.45 default gateways?

No in those examplse both have a default gateway of 192.1.2.254.

> Does this even matter when its host to host on same switch?

Nope :)

> Is the example based on 2 hosts in the same LAN?

Yes, the example has two hosts in the lan 192.1.2.0/24

Paul