HK Filtering? Or Just an Error?



There have been a wide variety of reports suggesting that ntscmp.com is being filtered in Hong Kong. Global Voices has a great round-up of the discussion. It is clear from the discussion that users are reporting various results, some are able to access the site others are not.

ntscmp.com is hosted on a web hosting company in the U.S. Its IP address is 69.49.101.19 [reverse DNS – hostedc10.megawebservers.com] and at least 5,439 other domain names are also hosted on that IP address.

I issued traceroute requests from 7 different locations in Hong King (different AS numbers). None of the 7 were able to sucecssfully reach the IP address, but the last hop for all was outside of Hong Kong.

Unfortunetly, I was not able to test on PCCW (the biggest telecom in HK and ISP netvigator) — the for which there is speculation as to a political motive for the blocking — but the fact that there is inaccessiblity on other unrelated ISP’s and that this is a result of something happeneing upstream it is unlikely that filtering is occuring, rather there are various network errors occuring.

If filtering is occuring (perhaps by upstream providers) it could be targetting one of the other 5,439 hosted on that same server. At this point there does not seem to be evidence of targeted filtering by Hong Kong ISP’s.

Pacific Supernet (AS2706)

traceroute to ntscmp.com (69.49.101.19), 10 hops max, 40 byte packets
1 tmhs3506-v1.pacific.net.hk (202.14.67.252) 0.555 ms 0.521 ms
2 v206.tmhc2.pacific.net.hk (202.64.154.65) 0.264 ms 0.361 ms
3 g0-3.ig1.pacific.net.hk (202.64.4.136) 0.413 ms 0.985 ms
4 62.153.203.137 (62.153.203.137) 2.181 ms 3.039 ms
5 217.239.40.78 (217.239.40.78) 255.726 ms 255.226 ms
6 * *
7 * *
8 * *
9 * *
10 * *

LinkWan (AS4058)

————————————————————
| 0 | | 202.66.30.36 | pc036.visl.com.hk | * | | |

| CPCNet Hong Kong Ltd. |
| 1 | | 202.66.30.62 | pc062.visl.com.hk | ?Hong Kong, Hong Kong | * | 5 | x

— | CPCNet Hong Kong Ltd. |
| 2 | | 202.76.120.203 | C-0-1.qb-peer1.noc.cpcnet-hk.com | ?Hong Kong, Hong Kong | * | 17 | x

— | CPCNet Hong Kong Ltd. |
| 3 | | 203.131.241.65 | – | ?(Hong Kong) | * | 0 | x

| HKNet Company Limited |
| 4 | | 203.131.240.61 | ge-0-0-0.r00.newthk01.hk.bb.gin.ntt.net | ?(Hong Kong) | * | 1 | x

| HKNet Company Limited |
| 5 | | 129.250.2.109 | p16-0-2-1.r20.tokyjp01.jp.bb.gin.ntt.net | … | | 51 | x

| NTT America, Inc. NTTA-129-250 |
| 6 | | 129.250.4.41 | p64-0-3-0.r21.snjsca04.us.bb.gin.ntt.net | … | | 171 |

x | NTT America, Inc. NTTA-129-250 |
| 7 | | 154.54.10.49 | te14-0-0.sjc03.atlas.cogentco.com | … | | 171 |

x | Performance Systems International PSINET-B2-54 |
| 8 | | 154.54.6.101 | v3491.mpd01.sjc01.atlas.cogentco.com | … | | 174 |

x | Performance Systems International PSINET-B2-54 |
| 9 | | 154.54.1.25 | t2-1.mpd02.sfo01.atlas.cogentco.com | … | | 183 |

x— | Performance Systems International PSINET-B2-54 |
| 10 | | 154.54.6.41 | t2-2.mpd01.mci01.atlas.cogentco.com | … | | 206 |

x | Performance Systems International PSINET-B2-54 |
| 11 | | 154.54.5.205 | g9-0-0.core01.mci01.atlas.cogentco.com | … | | 206 |

x | Performance Systems International PSINET-B2-54 |
| 12 | | 66.28.4.34 | p5-0.core02.ord01.atlas.cogentco.com | … | | 231 |

x- | Cogent Communications COGENT-NB-0000 |
| 13 | | 66.28.4.214 | p5-0.core01.yyz01.atlas.cogentco.com | … | | 245 |

x | Cogent Communications COGENT-NB-0000 |
| 14 | | 154.54.5.78 | v3491.mpd01.yyz01.atlas.cogentco.com | … | | 245 |

x | Performance Systems International PSINET-B2-54 |
| 15 | 12 | 154.54.5.86 | v3493.mpd01.yyz02.atlas.cogentco.com | … | | 256 |

x—- | Performance Systems International PSINET-B2-54 |
| … | | | | | | |

| |
| ? | | 69.49.101.19 | ntscmp.com | … | | |

| InternetNamesForBusiness.com MEGA-3 |
——————————————————————————————————————-

Analysis: IP packets are being lost past network “Performance Systems International PSINET-B2-54” at hop 15. There is insufficient cached information to determine the next network at hop 16.

HKFTP (AS4645)

1 202.67.226.254 (202.67.226.254) 0.246 ms 0.314 ms 0.312 ms
2 202.67.242.67 (202.67.242.67) 0.300 ms 0.259 ms 0.292 ms
3 fa-1-2-1.a02.newthk01.hk.ra.gin.ntt.net (61.200.84.213) 0.363 ms 0.740 ms 0.462 ms
4 ge-1-0-0.r00.newthk01.hk.bb.gin.ntt.net (203.131.240.233) 0.444 ms 2.107 ms 0.630 ms
5 p16-0-2-1.r20.tokyjp01.jp.bb.gin.ntt.net (129.250.2.109) 58.813 ms * 59.282 ms
MPLS Label=336419 CoS=3 TTL=1 S=0
6 p64-0-3-0.r21.snjsca04.us.bb.gin.ntt.net (129.250.4.41) 171.301 ms 171.639 ms 171.356 ms
7 te14-0-0.sjc03.atlas.cogentco.com (154.54.10.49) 177.716 ms 171.394 ms 171.269 ms
8 v3492.mpd01.sjc01.atlas.cogentco.com (154.54.6.105) 176.841 ms 173.712 ms *
9 t2-3.mpd02.sfo01.atlas.cogentco.com (154.54.1.129) 176.225 ms 176.058 ms 176.096 ms
10 g3-0-0.core02.sfo01.atlas.cogentco.com (154.54.3.117) 176.413 ms 176.918 ms 174.969 ms
11 p4-0.core01.mci01.atlas.cogentco.com (66.28.4.210) 224.426 ms 347.533 ms *
12 p5-0.core02.ord01.atlas.cogentco.com (66.28.4.34) 230.919 ms * 230.753 ms
13 * p5-0.core01.yyz01.atlas.cogentco.com (66.28.4.214) 244.578 ms 244.617 ms
14 v3491.mpd01.yyz01.atlas.cogentco.com (154.54.5.78) 245.699 ms 244.706 ms 245.022 ms
15 v3492.mpd01.yyz02.atlas.cogentco.com (154.54.5.82) 244.865 ms 244.625 ms 244.880 ms
16 * * *
17 * * *
18 * * *
19 * * *
20 * * *
21 * * *
22 * * *
23 * * *
24 * * *
25 * * *
26 * * *
27 * * *
28 * * *
29 * * *
30 * * *

Zonasa (AS4841)

traceroute to ntscmp.com (69.49.101.19), 30 hops max, 40 byte packets
1 fe0-0-7206-hk01-access.zonasa.net (202.140.168.7) 0.463 ms 0.595 ms 0.267 ms
2 ge2-0-hk01-access01.zonasa.net (202.140.168.168) 0.458 ms 0.934 ms 0.238 ms
3 203.129.80.34 (203.129.80.34) 0.471 ms 0.492 ms 0.428 ms
4 203.129.95.4 (203.129.95.4) 1.433 ms 1.160 ms 1.292 ms
5 218.189.109.133 (218.189.109.133) 3.475 ms 3.992 ms 3.763 ms
6 210.0.247.8 (210.0.247.8) 2.667 ms 2.464 ms 2.626 ms
7 210.0.250.10 (210.0.250.10) 2.753 ms 2.460 ms 2.427 ms
8 ge-1-0-0.r00.newthk01.hk.bb.gin.ntt.net (203.131.240.233) 50.271 ms 50.487 ms 50.585 ms
9 p16-0-2-1.r20.tokyjp01.jp.bb.gin.ntt.net (129.250.2.109) 50.414 ms 53.256 ms 50.564 ms
10 p64-0-3-0.r21.snjsca04.us.bb.gin.ntt.net (129.250.4.41) 240.477 ms 246.233 ms 247.326 ms
11 * te14-0-0.sjc03.atlas.cogentco.com (154.54.10.49) 177.530 ms 177.449 ms
12 v3493.mpd01.sjc01.atlas.cogentco.com (154.54.6.109) 178.123 ms 178.172 ms 178.146 ms
13 t2-3.mpd02.sfo01.atlas.cogentco.com (154.54.1.129) 181.209 ms 181.248 ms 181.424 ms
14 t2-2.mpd01.mci01.atlas.cogentco.com (154.54.6.41) 219.895 ms 216.321 ms 215.832 ms
15 t2-3.mpd01.ord01.atlas.cogentco.com (154.54.2.234) 226.914 ms 227.465 ms 228.230 ms
16 te6-0-0.core02.ord01.atlas.cogentco.com (154.54.1.177) 227.505 ms 226.960 ms 230.001 ms
17 p5-0.core01.yyz01.atlas.cogentco.com (66.28.4.214) 241.097 ms 241.851 ms 258.253 ms
18 v3490.mpd01.yyz01.atlas.cogentco.com (154.54.5.74) 241.013 ms 241.039 ms 241.871 ms
19 v3493.mpd01.yyz02.atlas.cogentco.com (154.54.5.86) 241.161 ms 241.684 ms 241.883 ms
20 * * *
21 * * *
22 * * *
23 * * *
24 * * *
25 * * *
26 * * *
27 * * *
28 * * *
29 * * *
30 * * *

Hutchison Global Crossing (AS9304)

traceroute to ntscmp.com (69.49.101.19), 30 hops max, 38 byte packets
1 203.184.192.38 (203.184.192.38) 0.796 ms 0.570 ms 0.650 ms
2 210.0.251.69 (210.0.251.69) 1.110 ms 0.698 ms 0.436 ms
3 210.0.247.8 (210.0.247.8) 1.723 ms 1.364 ms 1.526 ms
4 210.0.250.10 (210.0.250.10) 1.864 ms 1.900 ms 1.695 ms
5 ge-2-2-0.r00.newthk01.hk.bb.gin.ntt.net (203.131.240.249) 28.752 ms 29.217 ms 48.990 ms
6 p16-0-2-1.r20.tokyjp01.jp.bb.gin.ntt.net (129.250.2.109) 105.552 ms 104.457 ms 105.292 ms
7 * p64-0-3-0.r21.snjsca04.us.bb.gin.ntt.net (129.250.4.41) 222.734 ms 243.018 ms
8 te14-0-0.sjc03.atlas.cogentco.com (154.54.10.49) 230.500 ms 208.792 ms 212.090 ms
9 v3493.mpd01.sjc01.atlas.cogentco.com (154.54.6.109) 223.068 ms 220.427 ms 217.403 ms
10 t7-3.mpd01.sfo01.atlas.cogentco.com (154.54.6.133) 202.248 ms 206.609 ms 225.113 ms
11 t2-2.mpd01.mci01.atlas.cogentco.com (154.54.6.41) 239.791 ms 239.124 ms 259.288 ms
12 t2-3.mpd01.ord01.atlas.cogentco.com (154.54.2.234) 280.543 ms 278.948 ms 257.672 ms
13 te6-0-0.core02.ord01.atlas.cogentco.com (154.54.1.177) 259.752 ms 253.411 ms 277.826 ms
14 p5-0.core01.yyz01.atlas.cogentco.com (66.28.4.214) 367.645 ms 418.659 ms 269.986 ms
15 v3491.mpd01.yyz01.atlas.cogentco.com (154.54.5.78) 266.386 ms 297.374 ms 269.818 ms
16 v3493.mpd01.yyz02.atlas.cogentco.com (154.54.5.86) 272.050 ms 268.120 ms 296.847 ms
17 * * *
18 * * *
19 * * *
20 * * *
21 * * *
22 * * *
23 * * *
24 * * *
25 * * *
26 * * *
27 * * *
28 * * *
29 * * *
30 * * *

Sum.com.hk (AS9729)

Tracing route to ntscmp.com [69.49.101.19]

over a maximum of 30 hops:

1 1 ms <10 ms 1 ms 202.85.152.2

2 <10 ms <10 ms <10 ms ge0-1-0-0-jurm20-01.hk03.iadvantage.net [202.85.168.169]

3 <10 ms <10 ms <10 ms ge1-3-0-gjum7i01.hk03.iadvantage.net [210.184.124.7]

4 1 ms <10 ms 1 ms 80.77.0.245

5 51 ms 51 ms 51 ms so-2-3-0.0.cjr03.tok002.flagtel.com [62.216.128.181]

6 125 ms 71 ms 70 ms as3320.ix.jpix.ad.jp [210.171.224.145]

7 299 ms 300 ms 300 ms 217.239.40.78

8 * * * Request timed out.

9 * * * Request timed out.

10 * * * Request timed out.

11 * * * Request timed out.

12 * * * Request timed out.

13 * * * Request timed out.

14 * * * Request timed out.

15 * * * Request timed out.

16 * * * Request timed out.

17 * * * Request timed out.

18 * * * Request timed out.

19 * * * Request timed out.

20 * * * Request timed out.

21 * * * Request timed out.

22 * * * Request timed out.

23 * * * Request timed out.

24 * * * Request timed out.

25 * * * Request timed out.

26 * * * Request timed out.

27 * * * Request timed out.

28 * * * Request timed out.

29 * * * Request timed out.

30 * * * Request timed out.

Trace complete.

HTTP/1.1 502 Gateway Error
Server: Microsoft-IIS/5.0
Date: Fri, 22 Sep 2006 15:17:35 GMT
Connection: close
Content-Length: 186
Content-Type: text/html

Powerbase (AS9925)

Tracing route to ntscmp.com [69.49.101.19]
over a maximum of 30 hops:

1 <10 ms <10 ms <10 ms 202.153.96.33
2 16 ms <10 ms <10 ms 202.153.96.146
3 15 ms <10 ms <10 ms unknown.net.reach.com [134.159.100.185]
4 <10 ms <10 ms <10 ms i-5-3.tmh-dist02.net.reach.com [202.84.153.94]
5 <10 ms 16 ms <10 ms unknown.net.reach.com [202.84.153.170]
6 <10 ms 16 ms <10 ms i-2-1.iadv01.net.reach.com [202.84.143.185]
7 15 ms 32 ms 15 ms T-system-peer.iadv01.net.reach.com [134.159.127.154]
8 312 ms 313 ms 312 ms 217.239.40.78
9 * * * Request timed out.
10 * * * Request timed out.
11 * * * Request timed out.
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 * * * Request timed out.
20 * * * Request timed out.
21 * * * Request timed out.
22 * * * Request timed out.
23 * * * Request timed out.
24 * * * Request timed out.
25 * * * Request timed out.
26 * * * Request timed out.
27 * * * Request timed out.
28 * * * Request timed out.
29 * * * Request timed out.
30 * * * Request timed out.

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