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"Can't establish secure internet connection"

"Can't establish secure internet connection"

Uwe K.2
Helpful | Level 5

Starting yesterday in our corporate office (all sharing the same internet connection) we found two PCs suddenly are not syncing with Dropbox anymore, showing the well known "Can't establish secure internet connection" error.

Other PCs work normally.

We are located in Germany and using Windows 8.1 PCs. All Dropbox clients are up-to-date (version 3.2.4).

Upon further investigation and using Process Monitor from SysInternals I found that the erronous PCs create connections to CloudFront servers while the working ones don't.

An example would be

server-54-230-198-253.lhr50.r.cloudfront.net

When entering the URL https://server-54-230-198-253.lhr50.r.cloudfront.net/ into my browser, I get an error

ERR_SSL_VERSION_OR_CIPHER_MISMATCH

While I don't know whether my investigation is actually related to the error, I still want to report it here.

My questions:

  • Is anyone else having similar issues?
  • Could the CloudFront servers and the SSL errors be the source of the issue?
1 Accepted Solution

Accepted Solutions

Re: "Can't establish secure internet connection"

Jonathan C.23
Dropboxer

Hi Glen, I've gone ahead and temporarily disabled autoupdates for your account while we investigate the source of connectivity issues for users in Oman. In the meanwhile, could you try 3.10.11? https://www.dropboxforum.com/hc/en-us/community/posts/204347726-Stable-Build-3-10-11

View solution in original post

7 Replies 7

Re: "Can't establish secure internet connection"

Uwe K.2
Helpful | Level 5

BTW: When entering the mentioned server into

https://www.sslshopper.com/ssl-checker.html#hostname=server-54-230-198-253.lhr50.r.cloudfront.net

it says:

No SSL certificates were found on server-54-230-198-253.lhr50.r.cloudfront.net. Make sure that the name resolves to the correct server and that the SSL port (default is 443) is open on your server's firewall.

Re: "Can't establish secure internet connection"

Uwe K.2
Helpful | Level 5

The solution was actually simple, once we figured out:

  1. Log the client off from Dropbox
  2. Log in as another Dropbox user
  3. Log that other Dropbox user off again from the client
  4. Log in the original Dropbox user which failed initially

Now the sync works again. Verified for two PCs. Also the erroneous server-54-230-198-253.lhr50.r.cloudfront.net URL is not contacted anymore.

The Dropbox support was just as you would expect: Sending late, unhelpful robot texts, claiming I was too stupid to read the documentation or have a working firewall.

So still great product, although aweful support.

Re: "Can't establish secure internet connection"

AltanaESP L.
New member | Level 1

Had similar issue. However, the solution is quite simple... for some reason the date and time on my PC was reset to 1 June 2001. As soon as I reset it to the current date, the problem was solved.

Re: "Can't establish secure internet connection"

Adv. Vivek S.
New member | Level 1

Can't establish secure internet connection. I am receiving this message since last 2 days. need help as files are not being uploaded and shared

Re: "Can't establish secure internet connection"

Glen Michael T.
New member | Level 1

Hi. I'm having trouble with this "can't establish secure internet connection" error. I have a Mcafee Antivirus installed. Tried uninstalling Mcafee and reinstalling dropbox to no avail. Also tried the following with no positive results: apply "no proxy" in the settings, type command prompt netsh winsock reset catalog, turning off firewall and still nothing. Can anyone help with this issue? Would greatly appreciate it. Thanks!

Re: "Can't establish secure internet connection"

Jonathan C.23
Dropboxer

Hi Glen, I've gone ahead and temporarily disabled autoupdates for your account while we investigate the source of connectivity issues for users in Oman. In the meanwhile, could you try 3.10.11? https://www.dropboxforum.com/hc/en-us/community/posts/204347726-Stable-Build-3-10-11

View solution in original post

Re: "Can't establish secure internet connection"

Glen Michael T.
New member | Level 1

Hi Jonathan. Thanks for the help. That version works like a charm. 

 

[This thread is now closed by moderators due to inactivity. If you're experiencing a similar behavior, feel free to start a new discussion in the Ask a Question section here.]

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Top contributors to this post

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    Glen Michael T. New member | Level 1
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    Jonathan C.23 Dropboxer
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    Adv. Vivek S. New member | Level 1
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    AltanaESP L. New member | Level 1
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