Do I have a double NAT problem?

[rtn66uftw]

I've recently learnt about double NAT problem and tried to put my cable modem to bridge mode & left my router (Asus RT-AC68U) WAN connection type on Automatic IP. How do I know if I configured my setup properly? Below is the output from "tracert 8.8.8.8" if it would help. Thanks in advance for helping!

Tracing route to google-public-dns-a.google.com [8.8.8.8]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  RT-AC68U [192.168.29.1]
  2   547 ms    97 ms   192 ms  66.68.16.11
  3   188 ms   624 ms   704 ms  10.10.0.1
  4   323 ms   310 ms   151 ms  ge-9-0-5.mpr2.sea1.us.zip.zayo.com [128.177.105.173]
  5   220 ms   444 ms   174 ms  ae27.cs2.sea1.us.eth.zayo.com [64.125.29.2]
  6   700 ms   984 ms   660 ms  64.125.29.105
  7  1279 ms   879 ms   595 ms  72.14.208.172
  8   230 ms   269 ms   253 ms  108.170.245.97
  9   309 ms   262 ms   263 ms  209.85.249.189
 10   263 ms   251 ms   386 ms  google-public-dns-a.google.com [8.8.8.8]

Trace complete.

 

[L&LD]

You just need to go to your router's config page and see what the WAN address is.

If it is a public IP address, you've successfully put the cable modem into bridge mode.

If it is a private IP address, you need to keep trying.

 

[pete y testing]

66.68.16.11

certainly looks like your isp is using private ip addressing

3 188 ms 624 ms 704 ms 10.10.0.1

esp since its then goes to the above address

i assume there is no vpn or ddns involved and the router is just connected by ethernet to the bridged cable modem

 

[rtn66uftw]

Thanks guys!

You just need to go to your router's config page and see what the WAN address is.

If it is a public IP address, you've successfully put the cable modem into bridge mode.

If it is a private IP address, you need to keep trying.

WAN address does show a public IP address. I should be good to go then

certainly looks like your isp is using private ip addressing

esp since its then goes to the above address

i assume there is no vpn or ddns involved and the router is just connected by ethernet to the bridged cable modem

There is no VPN/DDNS and yest the router is connected directly to the cable modem

 

[ColinTaylor]

certainly looks like your isp is using private ip addressing

No it doesn't, that's a public IP address belonging to Time Warner Cable.

esp since its then goes to the above address

That's quite normal, it's the routing through the ISPs local network.

 

[sfx2000]

1 <1 ms <1 ms <1 ms RT-AC68U [192.168.29.1] 2 547 ms 97 ms 192 ms 66.68.16.11

The first hop is a public IP - so not double-natted...

When doing a traceroute out - google DNS does do some CDN activity, which explains the 10dot...

Example below - and no problems resolving back to me... as you can see, there is a ten-dot in the middle...

pi@raspy2:~ $ traceroute 8.8.8.8
traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets
 1  <mygateway> (192.168.1.1)  0.410 ms  0.379 ms  0.252 ms
 2  10.143.0.1 (10.143.0.1)  6.717 ms  12.018 ms  11.909 ms
 3  ip68-6-12-188.sd.sd.cox.net (68.6.12.188)  12.617 ms  12.509 ms  12.398 ms
 4  68.6.11.202 (68.6.11.202)  11.917 ms  11.805 ms  11.702 ms
 5  sanjbprj01-ae0.0.rd.sj.cox.net (68.1.5.184)  31.027 ms  31.541 ms  30.926 ms
 6  paltbprj02-ae1-308.rd.pt.cox.net (68.105.31.37)  23.316 ms  24.618 ms  24.444 ms
 7  108.170.242.81 (108.170.242.81)  29.728 ms  27.865 ms  27.664 ms
 8  216.239.56.121 (216.239.56.121)  41.522 ms 216.239.49.123 (216.239.49.123)  27.266 ms 216.239.49.95 (216.239.49.95)  26.642 ms
 9  google-public-dns-a.google.com (8.8.8.8)  28.385 ms  32.002 ms  31.846 ms