[Mip6-firewall] HA behind firewall - proposal

[Vijay Devarapalli]

Suresh,

This does address bootstrapping the MIPv6 home address via the
IKEv2 exchange. The home address would be unknown until then.

What might want to add is to require the firewall to allow all
IKEv2 messages also through to the home agent address.

Vijay

Suresh Krishnan wrote:
> Hi Folks,
>    I feel that a BCP for firewall admins would be the best way to 
> address the HA being behind a firewall.
> 
> * This firewall MUST NOT drop IPSec traffic bound to the Home Agent. The 
> home agent address needs to be configured on the firewall to explicitly 
> allow all IPSec traffic. If this traffic is found to be not legitimate, 
> a host based firewall or the HA implementation can drop the packet
> * If an MN is providing services (i.e. allows incoming connections), the 
> firewall needs to allow connection requests with the MN HoA as the 
> destination address. The address(es) of such MN(s) need to be configured 
> on the firewalls
> * The firewall MUST permit all HoT messages with a destination address 
> of a known MN HoA, if there was a HoTI message sent out with the same 
> source address. The firewall might verify if the home test init cookie 
> matches the one sent
> 
> I believe that these rules are reasonable, but some of these might not 
> be acceptable to firewall admins. But, since the home network is 
> providing a service, there is not much room to maneuver without changing 
> the MIP6 protocol and end nodes (which might be another option).
> 
> Cheers
> Suresh
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