Some time ago, Dropbox had never been accessible. I thought it was a wall, but it was not handled because of other things. Today I saw an article on the Internet and tried it myself, dropbox is accessible.
There are two well-known reasons: one is that the connection between you and the server is blocked; the other is that your DNS request is contaminated, a nonexistent destination is returned. Dropbox cannot be accessed because of the latter and DNS pollution.
Because the connection to Dropbox is not wall, if we can get the correct DNS query return value, we can synchronize Dropbox normally.
In the original article, we introduced the software dnscrypt released by opendns, which can encrypt DNS requests and returns to ensure that DNS return values are not tampered with or contaminated, so that we can get the correct DNS query return values.
The software is available in Windows and Mac OS versions. Many people do not know where to download the software. The original version also provides an official version.
Software: http://shared.opendns.com/dnscrypt/packages/
Running Effect in Windows:
Address: http://www.slyar.com/blog/dnscrypt-opendns-dropbox.html
Use dnscrypt to solve the Dropbox connection problem caused by DNS pollution