Open hongyi-zhao opened 3 years ago
@hongyi-zhao it looks as if your ISP is intercepting and modifying DNS traffic
Are there some methods for further digging into the underneath causes in the packet level?
Well, I just don't see what else could it be.
You could try a different DNS server to see if the responses are changed.
On Ubuntu 20.10, I use the self compiled git master version of dnsproxy. I noticed a very strange error when using dnsproxy as a forwarder as shown below:
First start dnsproxy as a forwarder:
Then check it with the following DNS query:
At the same time, the verbose output on stdout of dnsproxy is also shown as the following:
As you can see, obviously the return DNS record is wrong.
OTOH, I also checked with the remote upstream DNS server directly as below:
As you can see, only a DNS query using TCP will succeed. I'm very confused on this problem. Any hints/clues for this problem are highly appreciated.
Regards, HY