4 ms·
OK, I'm not sure I buy this explanation. If they want to revert whatever happened to 1.0.0.1, and fix 1.1.1.1, I'm fine with that. Here's what I do know: * I
by alex_young 9y ago
OK, I'm not sure I buy this explanation. If they want to revert whatever happened to 1.0.0.1, and fix 1.1.1.1, I'm fine with that.
Here's what I do know:
* I am an AT&T fiber customer.
* 1.1.1.1 did not resolve DNS for me any time I tested it.
* 1.0.0.1 did resolve DNS when I first tested it.
* Neither 1.1.1.1 or 1.0.0.1 work from the external interface of my AT&T router now.
* Strangely, 1.1.1.1 responds to ICMP requests from the diagnostic interface of the router, but not from the external interface.
* 1.0.0.1 does not respond to ICMP requests from the diagnostic interface of the router or from the external interface.
It sure looks like something upstream from my router is blocking requests to 1.0.0.1, and that this is new behavior.
Like I said earlier, I don't especially care what the reason is, as long as they do something to fix it.
- vermilingua 9y agoThe reason you are getting an ICMP respose from 1.1.1.1 is that your router is responding. This is consistent with the explanation. If you still want to doubt it, clear all DNS and ARP tables, ping 1.1.1.1, and check the ARP entry for it. It will match the MAC of your routers inward facing interface.
- alex_young 9y agoFrom the same diagnostic interface: traceroute to 1.1.1.1 (1.1.1.1), 30 hops max, 38 byte packets 1 1dot1dot1dot1.cloudflare-dns.com (1.1.1.1) 0.327 ms 0.156 ms 0.120 ms
- nitrogen 9y agoThe fact that the reverse DNS is correct doesn't mean that it's reaching the real deal. The fact that the ping time is fast enough that light could only have traveled 5 or 6 miles one way means it's almost certainly not the real deal.
- alex_young 9y agoYou're right. The fact that it's only one hop should have told me the same.
- ajross 9y agoFWIW: light can go ~23 miles in the 120us measured.
- nitrogen 9y agoHmm, not sure how I managed that; must have divided by 2 twice or something to find one-way length.