Sharepoint WebDAV over HTTPS

Question

Sharepoint WebDAV over HTTPS

Daniel M 126

Hi,

I am wondering if there is a way to force the webdav traffic to go over HTTPS?
The problem right now is that users can access our sharepoint sites and document libraries over HTTP even though we have nothing that listens on port 80.

There is no alternate access mapping that listens on http.
No bindings in IIS listen on port 80.

Through the web browser, everything works of course. You have to type https://portal but through the file explorer you can just type \portal\site and when you open a document, if you go the file tab you can see that the document resides in http://portal/xxxxxx

We have a load balancer that rewrites http to https but webdav goes under the radar here.

Anybody know how to deal with webdav using port 80?
Users love using webdav so we are hesistant to completely removing this option...

/Daniel

Green Arrow 51 Reputation points

2022-07-07T08:01:40.753+00:00

I know this is a pretty old question, but below is an interesting link describing Explorer View and ports for future information searchers:

All about “Explorer view” in SharePoint
learn.microsoft.com/en-us/archive/blogs/manjesh/all-about-explorer-view-in-sharepoint

Explorer View in SharePoint uses either the WebDAV or FPRPC protocols. WebDAV is used only on sites that are available over port 80. In other cases, the FPRPC protocol is used, which will use RPC ports instead (137,138,139 and 445). That would reasonably be the case for the OP, as the OP's site is not listening on port 80.

2 answers

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Green Arrow 51 Reputation points

2022-07-07T08:01:40.753+00:00

I know this is a pretty old question, but below is an interesting link describing Explorer View and ports for future information searchers:

All about “Explorer view” in SharePoint
learn.microsoft.com/en-us/archive/blogs/manjesh/all-about-explorer-view-in-sharepoint

Explorer View in SharePoint uses either the WebDAV or FPRPC protocols. WebDAV is used only on sites that are available over port 80. In other cases, the FPRPC protocol is used, which will use RPC ports instead (137,138,139 and 445). That would reasonably be the case for the OP, as the OP's site is not listening on port 80.

Answer 1

sco gordo 301

I may be wrong, but believe webdav requests are routed through IIS? If so, maybe set a URL Rewrite, redirecting http://... to https://...?

Answer 2

Elsie Lu_MSFT 9,801

Hi @Daniel M ,

Per my test, when using WebDav to connect to a site via HTTPS, the link is usually displayed as @rithansodo like the first screenshot, and if it is connected via HTTP, it will be like the second one. Would you like to provide a screenshot about “if you go the file tab you can see that the document resides in http://portal/xxxxxx” to check your URL?

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Daniel M 126 Reputation points

2020-11-06T14:26:27.28+00:00

Hi,
Yes, I can connect to the sharepoint webapplication/site through SSL over webdav. No problem there.

The problem is that you can also connect withouth SSL, which I don't like. Just remove the "@rithansodo " in the address.
If I use the address without SSL and start browsing and open an office document. The connection is made to sharepoint using http.
How can that be if there are no bindings in IIS that listen to port 80?
Elsie Lu_MSFT 9,801 Reputation points

2020-11-11T09:29:15.803+00:00

Hi @Daniel M ,

In this case, we may not be able to make more suggestions with the existing information. I would suggest you to open a support ticket for more help. Hope your issue could be resolved as soon as possible. :)

Thanks,
Elsie Lu

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Sharepoint WebDAV over HTTPS

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