mDNS/avahi/zeroconf/bonjour & Chromecast to WAN port

OK, I have the avahi-daemon at least working to resolve LEDE.local. I changed the parameter:

publish-workstation=yes

I also found this post:

It looks like there is a nifty iptables magic there to get the TTL=1 mangled. I'll have to go read those posts @joe_internet pointed out.