44net-request@hamradio.ucsd.edu wrote:
Subject: Re: [44net] Strange Broadcasts... From: Nigel Vander Houwen nigel@k7nvh.com Date: 06/13/2015 09:30 PM
To: AMPRNet working group 44net@hamradio.ucsd.edu
Rob,
Thank you for making my point. The reason you cant use a 44/8 address for a tunnel endpoint is because routing is broken.
Nigel
I don't agree with you. There is a problem with routing inside UCSD in that case, but there are other reasons why that should not be done. When you run an IPIP gateway on a source-address-filtered system (and in my opinion, ALL user connections should be soirce-address-filtered!! ISP's that don't to that just suck!) you need to route back traffic from net-44 to internet via the gateway. The only viable way of setting up policy routing rules to do that falls apart when tunnel endpoints are inside 44.0.0.0/8. So that should just be prohibited. (As Marius also explained, it is even worse when tunnel endpoints exist within subnets that are also advertised as being gatewayed)
Rob