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Why is my ISP network banned from accessing Dropbox?

Hello all,

Has there some restrictions set? I suddenly cannot reach to Dropbox using one of my ISP:

... 🤔 Why? As seems I'm not banned (nor my account)... The above appears with particular network connection only though I can reach the site, but the site "cuts" me. 🤷

Dropbox discriminates this link. Why?

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Jay

Hi @Здравко, thanks for messaging the Community.

Currently, we're not experiencing any issues with users accessing the Dropbox site.

If it's specific to one ISP, then you'll need to check with them to see that they haven't blocked traffic to the following Dropbox domains.

If you have any further queries, feel free to message back.

Здравко

@Jay, if the traffic was blocked, would such a message even be visible? It's Dropbox generated! More precisely Dropbox forum. If the traffic was blocked, I would never see it!!!

And yes, the above appear only when I use link through https://www.vivacom.bg/. Does Dropbox has some some argues with? Dropbox cuts the link!!!

PS: Till yesterday everything was fine. I just discover the issue. Something happened on your side in meantime.

ADD: More information about the "blocked" network traffic (I hope will be useful for your engineers to trace what's going on):

GET / HTTP/2
Host: www.dropboxforum.com
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:128.0) Gecko/20100101 Firefox/128.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/png,image/svg+xml,*/*;q=0.8
Accept-Language: bg,en-US;q=0.7,en;q=0.3
Accept-Encoding: gzip, deflate, br, zstd
DNT: 1
Sec-GPC: 1
Connection: keep-alive
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: none
Sec-Fetch-User: ?1
Priority: u=0, i
Pragma: no-cache
Cache-Control: no-cache

HTTP/2 302
content-length: 0
location: https://www.dropboxforum.com:443/t5/errors/FilterErrorHandlerPage
date: Thu, 18 Jul 2024 12:34:42 GMT
set-cookie: ...
set-cookie: ...
server: Apache
pragma: no-cache
expires: Thu, 01 Jan 1970 00:00:00 GMT
cache-control: no-cache, no-store, must-revalidate, private
set-cookie: LiSESSIONID=89D76000DB79839D4E17945746AAFB73; Path=/; Secure; HttpOnly;SameSite=None
set-cookie: ...
set-cookie: ...
set-cookie: ...
x-cache: Miss from cloudfront
via: 1.1 19cd9c9f4eb51e9e5c75add1d4b6f304.cloudfront.net (CloudFront)
x-amz-cf-pop: VIE50-C2
x-amz-cf-id: Y2KQ9s_fxuLSY1z9nbd0gM92_zn33OhpcBVsW2cWs_scoPxON7G-Kw==
X-Firefox-Spdy: h2

GET /t5/errors/FilterErrorHandlerPage HTTP/2
Host: www.dropboxforum.com
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:128.0) Gecko/20100101 Firefox/128.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/png,image/svg+xml,*/*;q=0.8
Accept-Language: bg,en-US;q=0.7,en;q=0.3
Accept-Encoding: gzip, deflate, br, zstd
DNT: 1
Sec-GPC: 1
Connection: keep-alive
Cookie: ...
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: none
Sec-Fetch-User: ?1
Priority: u=0, i
Pragma: no-cache
Cache-Control: no-cache
TE: trailers

HTTP/2 403
content-type: text/html;charset=UTF-8
date: Thu, 18 Jul 2024 12:34:42 GMT
set-cookie: ...
set-cookie: ...
server: Apache
x-frame-options: SAMEORIGIN
pragma: no-cache
expires: Thu, 01 Jan 1970 00:00:00 GMT
cache-control: no-cache, no-store, must-revalidate, private
x-robots-tag: noindex, nofollow
set-cookie: ...
x-cache: Error from cloudfront
via: 1.1 19cd9c9f4eb51e9e5c75add1d4b6f304.cloudfront.net (CloudFront)
x-amz-cf-pop: VIE50-C2
x-amz-cf-id: P_EBJ_TijmRuYepv3i7mlvpDOdG_QZq2n0xF5rKB3QewnLS3FCJO-A==
X-Firefox-Spdy: h2

And as result of above "blocked" traffic finally appears the page in OP. Only the cookies has cut.

That's it.

@Sheena, As far as know, you are part of forum support tech team. Can you share some thoughts about where that redirect to error page comes from (visible above in the traffic dump, in the first request response)? 🙏😳

Jay

Could you clarify exactly what you mean? Is it that links to Dropbox from that site you mentioned don't work at all?

Or, is it when you connect using that ISP, you can't access the site? Do you use a VPN on your machine?

Здравко

@Jay wrote:
Could you clarify exactly what you mean? Is it that links to Dropbox from that site you mentioned don't work at all?

...

@Jay, "exactly what you mean"? Does the traffic dump not enough? Whenever I open anything on www.dropboxforum.com it redirects me to the error page (again, exactly as clearly seen on the dump)!!! Take a look en focus on:

...

location: https://www.dropboxforum.com:443/t5/errors/FilterErrorHandlerPage

...

It's something that comes from Dropbox!!! Why????

@Jay wrote:
...

Or, is it when you connect using that ISP, you can't access the site? ...

Take a look on the page above (OP). How do you think - is this a Dropbox Forum site access or not? 🤔

@Jay wrote:
... Do you use a VPN on your machine?

No... nothing like that... My connection is direct. no VPN, no proxy, etc.

Sheena

Hi @Здравко , thanks for letting us know. Our community is hosted by a 3rd party vendor, and since this is one ISP affected I would guess that there is a temporary block due to high traffic or something to that effect. Especially as it was working for you just yesterday, I believe that it will work again very soon.

I have logged a ticket with our community host to check on their side if there's any issues, and I'll post back here when I know more. If it does start working again in the meantime, please let me know so we can check the logs.

Thanks again!

Здравко

Thanks @Sheena, Ok thanks for clarification. 😉

Let's hope it will be back soon. And yes, I will let you know once I find it's working again.

Thanks again.

Здравко

It works 1~2 times per day for few clicks (at most) and all the rest is as described above....

As seems by now, it won't work again very soon... 😕

ADD: Another interesting information that isolates the places to debug is that troubles come only from some of the hosts that www.dropboxforum.com resolve to: the defaults - 13.32.110.3, 13.32.110.27, 13.32.110.83, 13.32.110.92. The mentioned hosts carry troubles!

If I force browser use other matching IP (18.244.87.106 for instance) everything works correct regardless used link. You can check the particular servers settings and/or status.

I hope this helps improving your service and speeds up issue resolving.

Здравко

Hi again @Sheena,

As seems, the broken link that your server scripts refused to serve is back to normal work from yesterday. I'm writing this post while connected with the same link.

Hope you're are doing well and wish you nice monday and week ahead. 😉

Sheena

Hi @Здравко ,

Our team are still working on this issue in the background, so they may have fixed it, but I suspect that this was an issue on the ISP side, as that is more common. I'll pass on the message though and will reply here again when I know more.

All the best, hope you have a wonderful day 😊 Thanks!

Здравко

@Sheena wrote:
..., but I suspect that this was an issue on the ISP side, as that is more common. ...

I don't think it could be issue at ISP side at all. What are you motives to think so? 🤔

Motives in opposite direction:

All other sites worked (and continue work) without issue;
Even the connection to Dropbox forum works (as such). Dropbox forum refused to serve the request! The request itself was reaching Dropbox forum site and the response (status 403) successfully was flowing back (as can be seen in the dump). What ISP issue here?!

Anyway, its back to work. 😉 It's good idea you understand what was wrong though, so it will be prevented in the future.

Sheena

Hi @Здравко, I wanted to check in and see if that issue has reoccured at any point, or has it been stable since then? Thanks!

Здравко

Hi @Sheena, thanks for interested in. 🙋 The server issue was active from Thursday to Saturday inclusive. Since Sunday (July 21) lunch (local time), no more issues. 🎉🤞 I hope and believe it will stay so.

Thanks again, have a nice day and weekend ahead.

Здравко

Hi @Sheena,

I want to complain about other Dropbox forum dis-function that got up recently. For whatever reason, I cannot tag forum member, using @ (at) symbol anymore. To be able tag you here, I had to edit the post source - pretty inconvenient. Even more, it's NOT only to me - your colleagues as seems have the same issue as could be seen here, here, here, etc. I believe it's some small bug that asks for to be freed outside forum by somebody. 😉 I believe too that you can.

Also, I have one proposal. Currently, in post editor is missing a way to format some part of the text as inline code - something that may gets done by <code></code>. I think would be an easy way to be added a small button that wraps marked text in such a way (take a look here for an example and focus on formatting of 'startOAuth2PKCE' there). Do you agree? 🧐

Thanks in advance.

Rich

@Здравко wrote:
For whatever reason, I cannot tag forum member, using @ (at) symbol anymore.

That's a known issue and they're working on it.

Currently, in post editor is missing a way to format some part of the text as inline code - something that may gets done by <code></code>.

If you expand the toolbar, do you have the code option?

<!DOCTYPE html>
<html>
<body>

<h1>Code Editor</h1>
<p>It seems to work just fine.</p>

</body>
</html>

Здравко

Hm..🤔 I asked for inline code. Does the button you point do this? 🧐 Rhetoric of course. 🙂 As seems on the same screenshot, you posted, it doesn't!

Rich, this button may include code tag, but it is not the main one and definitely not inline (despite itself is inline). The main tag there is the pre tag - a block tag!

Hope this sheds some light. 😉

PS: I believe the following screenshots show the differences:

Do they?

Sheena

Hi @Здравко, as Mark mentioned, this is a known issue with we’re investigating currently. And thanks for the suggestion regarding an inline code tag, that’s not something we’re going to be able to implement but I appreciate the suggestion 😊

Здравко

@Sheena wrote:
..., that’s not something we’re going to be able to implement ...

Thanks anyway... 🙂

Just an underline: It is implemented already!!! My screenshot shows a Greg post that I linked to above - a post here in the forum, already existing that you can see. In this context nothing needs to be implemented, since already existed. My suggestion is just a way to be used convenient - nothing more.

Have a nice day.