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Superuser
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Message 11 of 27
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Re: some chinese websites cannot be opened

@TonyZ

The strange thing is that the tracert's show a different DNS lookup to a direct DNS lookup

Form the first lines of your tracert's

C:\Users\Administrator>tracert baidu.com

Tracing route to baidu.com [220.181.57.216]
over a maximum of 30 hops:

1 1 ms 1 ms 1 ms router.asus.com [a.b.c.d] \\a.b.c.d is my home router IP i set myself. 
2 12 ms 12 ms 10 ms 10.11.20.1

incidentally the second one should have been to pan.baidu.com but was simply a repeat of the first.

I'm going to ignore the fact that the tracert's didn't complete.  I can reach both sites and I get an identical tracert for baidu.com - the last hop simply drops ICMP pings.

However your tracert doesn't match the nslookup result

C:\Users\Administrator>nslookup baidu.com
Server: router.asus.com
Address: a.b.c.d

Non-authoritative answer:
Name: baidu.com.huawei.com
Address: 92.242.132.24

BTW hiding your router IP is not strictly necessary.  Even though you set it yourself, it's still going to be an RFC1918 address.  Such addresses can't be reached from the internet.

Tim

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TonyZ
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Message 12 of 27
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Re: some chinese websites cannot be opened

Thank you for the message, appreciate your help, but when i switch to my mobile phone which is vodafone network, everything is working fine. also this worked before at my home, i still think something happen on VM side.

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TonyZ
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Message 13 of 27
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Re: some chinese websites cannot be opened

Thanks Tim, the websites worked fine before at my home for sure. and also when i use my mobile hotspot which is vodafone network, i have no problem with those websites. please advise. Thanks,

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Superuser
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Message 14 of 27
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Re: some chinese websites cannot be opened

Different DNS is in use via your Vodafone connection. To confirm this go to https://www.dnsleaktest.com, read the privacy statement, and if happy to continue select Standard test. If you repeat the test via your Virgin Media connection you will see a different result. Can you post the latter result for the Hostname and ISP; for example my result is [redacted].virginmedia.net and Virgin Media.

FYI, think of DNS as serving a similar function to a phone book where there is a name to phone number mapping. You look up a name, it maps to a phone number allowing you to contact that person. With DNS the website address maps to an IP address which is used to connect with the website. When you used the nslookup command to find the IP address for baidu.com it returned the wrong IP address and this is why you were unable to connect to the website. When you specified a different DNS (8.8.8.8) nslookup returned the correct IP address for the website. In terms of the earlier phone book analogy, one phone book's name to phone number mapping is wrong whilst the other has the correct mapping.

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TonyZ
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Message 15 of 27
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Re: some chinese websites cannot be opened

Here is the test result:

62.253.********* **************virginmedia.net Virgin Media

United Kingdom

 

 

[MOD EDIT: For your security personal and private information has been removed from this post. Please review the Forum Guidelines]

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Superuser
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Message 16 of 27
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Re: some chinese websites cannot be opened

Thank you for that information which confirms your connection is using Virgin Media's DNS.

AFAIK now Barefruit provide Virgin Media's Advanced Network Error Search service which would explain why:

@TonyZ wrote:

C:\Users\Administrator>nslookup baidu.com
Server: router.asus.com
Address: a.b.c.d

Non-authoritative answer:
Name: baidu.com.huawei.com
Address: 92.242.132.24

returned an IP address of 92.242.132.24 for baidu.com.huawei.com which does not exist. Can you confirm nslookup baidu.com returned the result shown above.

Did you scan your device for malware?

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TonyZ
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Message 17 of 27
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Re: some chinese websites cannot be opened

i have changed my DNS to 8.8.8.8 on my router and my PC, still cannot reach the websites i mentioned. new nslookup is following:

C:\Users\Administrator>nslookup baidu.com
Server: google-public-dns-a.google.com
Address: 8.8.8.8

Non-authoritative answer:
Name: baidu.com
Addresses: 220.181.57.216
123.125.115.110


C:\Users\Administrator>nslookup pan.baidu.com
Server: google-public-dns-a.google.com
Address: 8.8.8.8

Non-authoritative answer:
Name: yiyun.n.shifen.com
Address: 111.206.37.70
Aliases: pan.baidu.com

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Superuser
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Message 18 of 27
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Re: some chinese websites cannot be opened

Changing of DNS is premature but since the change is now made it is probably something best reviewed later.

Did you run a malware scan on your PC?

Try the following to see if you can telnet to baidu.com and retrieve the web page where:

  • bold text is input to be typed
  • non-bold text is output produced
  • bold italic text, enclosed within square brackets, is an action to perform

 

telnet baidu.com 80
Trying 220.181.57.216...
Connected to baidu.com.
Escape character is '^]'.
GET /baidu.html?from=noscript HTTP/1.1
Host: www.baidu.com
Connection: close
[press Enter key to insert blank line]

HTTP/1.1 200 OK
Date: Fri, 28 Sep 2018 18:00:00:00 GMT
Server: Apache
Last-Modified: Sat, 31 Dec 2011 09:54:00 GMT
ETag: "1cdb-4b56054245e00"
Accept-Ranges: bytes
Content-Length: 7387
Cache-Control: max-age=86400
Expires: Sat, 29 Sep 2018 18:00:00 GMT
Connection: Close
Content-Type: text/html

There is more output produced than that shown but the only part of interest is that which immediately appears after the inserted blank line (as shown above), post that with your reply.

 

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Superuser
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Message 19 of 27
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Re: some chinese websites cannot be opened

Bear in mind that if you try using telnet to a http site in Windows 7 and above, you can't see what you are typing - although it is there.

The best way to get round this I've just discovered is to use the following sequence.

telnet
Welcome to Microsoft Telnet Client

Escape Character is 'CTRL+]'

Microsoft Telnet> set localecho
Local echo on
Microsoft Telnet> open baidu.com 80
Connecting To baidu.com...

When you type in the text it appears in the top left overwriting the Welcome to Microsoft Telnet Client message.  The only text that gets sent though is what you type.

Tim

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TonyZ
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Message 20 of 27
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Re: some chinese websites cannot be opened

I got this by telneting it

Microsoft Telnet> open baidu.com 80
Connecting To baidu.com...Could not open connection to the host, on port 80: Con
nect failed

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