Hi Terry, > my concern wsa that if I got my routing tables wrong then my server > could respond to a DNS Request from the PoS equipment instead of the > ISP defined Routers.
The PoS doesn't broadcast a DNS request, but sends it to its configured DNS servers, none of which should be router-pi's Internet-side interface and so it won't even see packet. If PoS had the router-pi's captive-side IP address as a DNS server for some reason then it wouldn't know how to get it to there without a route via Internet-side interface. > Presumably, if I've got the setup right, I shouldn't be able to ping the > server from the Internet side of eth1 (eg my PC), only the AP side (eg my > phone)? It's not a server that's pinged, but an interface. Often, they're the same, but you have two of interest, plus loopback. You need to try pinging both from both sides, so four pings. Cheers, Ralph. -- Next meeting: Bournemouth, Tuesday, 2018-07-03 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:[email protected] / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
