<html><head></head><body> <div><br></div><div>Breaks mtr. </div><div>Im trying to diagnose some issues and the other party insists on mtr working from both sides. </div><div>Inbound to me the 10.20.21.212 drops all pings and mtr goes no further.</div><div>The ping is not addressed to 10.20.21.212. It should elicit a ttl expired icmp response.<caret></caret></div><div><br></div>Thats the main reason this got my attention again. <div><br> <div id="protonmail_mobile_signature_block"><div>Sent from Proton Mail for iOS</div></div> <div><br></div><div><br></div>On Wed, Jun 15, 2022 at 11:10, Tim Connors <<a href="mailto:tim.w.connors@gmail.com" class="">tim.w.connors@gmail.com</a>> wrote:<blockquote class="protonmail_quote" type="cite"> On Tue, 14 Jun 2022, Damon Permezel via linux-aus wrote:<br><br>><br>> Here is the explanation from 2019:<br>><br>> > The 10.20.x.x interestingly is a loopback address for the provider<br>> > edge NBN / TPG network.It's not pingable, however it does appear in<br>> > traceroutes.We have discussed this issue with networks to remove it,<br>> > however it's not high on their agenda and it's not breaking anything,<br>> > apart from causing angst among the network savvy customers.<br>><br>> Sounds like exactly the thing they would say if they are intercepting<br>> all my traffic ... -;)<br><br>I don't even understand the angst - maybe I'm not network savvy enough.<br><br>Telecom providers have internal infrastructure required to route your<br>traffic. What IP addresses they are assigned is completely irrelevant to<br>you, so long as the packets can be routed to your required destination.<br>Since your required destination isn't a private IP address, it's<br>completely legitimate for hops along the way to be in the private ranges.<br><br>It's not like it's going to break ICMP or anything.<br><br>It's not like a vendor of ours who ship thousands of devices with<br>unconfigurable IPs in a private range, which happens to clash with already<br>existing mail servers in that same range, which we need to be able to<br>communicate with.<br><br>--<br>Tim Connors<br></blockquote></div></body></html>