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Host unreachable, from home network only
Hi, I'm seeing a routing problem to a specific external host, www.clarknaddison.com (74.95.134.237). I'm unable to see any traffic to this address from my home xfinity network, but I can from other locations outside. For example, I can tether my laptop to an AT&T phone and load that page without problems. I have so far not seen problems with any other web sites, but I believe this to be an issue with comcast routing.
A sample traceroute from my house:
$ traceroute www.clarknaddison.com traceroute to www.clarknaddison.com (74.95.134.237), 64 hops max, 52 byte packets 1 192.168.1.1 (192.168.1.1) 1.614 ms 5.889 ms 9.243 ms 2 10.0.0.1 (10.0.0.1) 146.458 ms 96.120.28.5 (96.120.28.5) 17.909 ms 20.951 ms 3 be132-rur02.wchicago.il.chicago.comcast.net (96.108.112.197) 160.739 ms 27.194 ms 149.986 ms 4 be-124-ar01.area4.il.chicago.comcast.net (162.151.45.109) 22.390 ms 31.303 ms * 5 69.139.202.57 (69.139.202.57) 28.380 ms 21.709 ms 20.076 ms 6 69.139.173.90 (69.139.173.90) 19.630 ms 29.523 ms 29.950 ms 7 * * *
And one while tethered to the phone:
$ traceroute www.clarknaddison.com traceroute to www.clarknaddison.com (74.95.134.237), 64 hops max, 52 byte packets 1 192.168.43.1 (192.168.43.1) 8.521 ms 13.563 ms 8.406 ms 2 172.26.96.161 (172.26.96.161) 45.618 ms 60.731 ms 32.252 ms 3 107.79.236.252 (107.79.236.252) 32.538 ms 51.873 ms 52.079 ms 4 12.83.186.161 (12.83.186.161) 45.034 ms 46.387 ms 55.447 ms 5 12.83.186.145 (12.83.186.145) 64.676 ms 127.541 ms 132.374 ms 6 cgcil403igs.ip.att.net (12.122.133.33) 52.439 ms 40.042 ms 34.430 ms 7 192.205.37.22 (192.205.37.22) 159.277 ms 45.832 ms 58.064 ms 8 be-2304-cs03.350ecermak.il.ibone.comcast.net (96.110.37.41) 32.411 ms be-2404-cs04.350ecermak.il.ibone.comcast.net (96.110.37.45) 49.177 ms 47.272 ms 9 96.110.40.58 (96.110.40.58) 38.211 ms 96.110.40.62 (96.110.40.62) 54.880 ms 96.110.40.58 (96.110.40.58) 53.823 ms 10 69.139.202.57 (69.139.202.57) 49.044 ms 42.682 ms 50.372 ms 11 69.139.173.90 (69.139.173.90) 48.642 ms 45.747 ms 193.294 ms 12 * * *
it appears that the difference is the routing through the intermediate ibone/chicago.comcast.net switches. Can anyone help me resolve this, or point me to the right place to escalate this?
Thanks!
BruceW
Gold Problem Solver
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26.5K Messages
5 years ago
I can reach the site. When one customer cannot reach a site but others can, it may mean the site is blocking that customer's public Comcast IP. You can look up your IP at https://www.google.com/search?q=what+is+my+IP.
My trace from South-Central PA looks like:
Note that my trace reaches one hop past where yours appears to die, which can mean that the target site or its webhost are blocking you.
Are you using a Comcast gateway device with their buggy "xFi Security" enabled?
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