Nate;

On Fri, 2019-07-12 at 02:27 -0700, Nate Sales via 44Net wrote:

email message attachment (Comcast Xfinity Routing)

...

I'm wondering if anyone here has had success with an IPIP gateway on Xfinity by Comcast. I haven't had a lot of success with it, and I'm wondering if even in "bridge" mode the CPE modem/router that they give you is still blocking protocol 4.

I'm on Xfinity and it took me about 2 years to figure out what's going on with them and how to fix it. I wrote a white paper on the topic:

https://uronode.n1uro.com/linux/amprcable.html

It's a 44-net IP so if you can't see it let me know and I'll send you the text off-list.