On Sun, Sep 03, 2017 at 08:19:13AM -0500, gregrwm wrote: > On Sun, Sep 3, 2017 at 7:47 AM, Jon Schewe <jpschewe at mtu.net> wrote: > > > I'm trying to debug some issues with my internet connection. I have > > Comcast and the traceroute results are not coming back what I expect. On my > > router my routing table looks like this: > > > > >netstat -rn > > Kernel IP routing table > > Destination Gateway Genmask Flags MSS Window irtt > > Iface > > 0.0.0.0 73.37.164.1 0.0.0.0 UG 0 0 0 > > enp1s10 > > 73.37.164.0 0.0.0.0 255.255.254.0 U 0 0 0 > > enp1s10 > > > > Given that, I expect the first hop in a traceroute to be 73.37.164.1, but > > it's not. > > >traceroute -n 8.8.8.8 > > traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets > > 1 96.120.48.69 8.890 ms 14.915 ms 15.659 ms > > 2 68.85.168.121 14.833 ms 15.604 ms 15.575 ms > > 3 96.108.188.62 14.502 ms 14.484 ms 14.665 ms > > 4 96.108.188.101 15.455 ms 16.596 ms 16.574 ms > > 5 68.86.94.81 28.011 ms 26.859 ms 26.841 ms > > 6 68.86.85.158 24.289 ms 19.757 ms 22.386 ms > > ... > > > > Can anyone explain what's going on here? > > > > your traceroute addresses starting with 68.85.168.121 identify as comcast > hosts. 96.120.48.69 is also a comcast address is you do a whois for it. Routers have multiple interfaces, and each interface should have an IP address. 73.37.164.1 is the address of one interface on the router. Quite likely, 96.120.48.69 is an address on one of the other interfaces of the router. Andrew