Ftp error 550 iis

I’m trying to connect to our FTP on an IIS server and I’m having issues viewing files/folders. My manager is able to connect with no issues and it’s been a long time since he set it up. We added a Windows account for me and I’m able to connect, but unable to access folders. We set the permissions on the server so I have full control, but it still doesn’t seem to want to allow me to access it. Any idea what we might be missing? We’ve tried restarting the FTP service, but that didn’t seem to work either.

FileZilla logs:

Status: Retrieving directory listing...
Command:    CWD /folder_name
Response:   550 Cannot create a file when that file already exists. 
Error:  Failed to retrieve directory listing

CMD:

ftp> cd folder_name
550 Cannot create a file when that file already exists.

asked Nov 26, 2014 at 16:59

answered Dec 9, 2014 at 17:50

I had a similar problem, receiving the following message when logged in to an IIS 8.5 FTP server:

ftp> cd folder_name
550 Cannot create a file when that file already exists.

I believe the problem started after changing the physical path of the FTP site when FTP authorization settings had already been applied. The fix was to delete the FTP site from within IIS, point it to the correct physical path, then re-apply authorization settings via the «FTP Authorization Rules» icon.

answered Apr 21, 2015 at 14:42

answered Jan 6, 2022 at 17:28

I’m trying to setup a ftp server for one of my websites hosted with IIS 8 on Windows Server 2012.

So I set up my website, everything worked fine and the website is reachable.
Then I rightclicked the website entry -> Add FTP publishing -> no assigned ip address, port 21, chose my self signed certificate -> next -> Authentification: Standard, Allowed access for user Administrator, Read/Write permissions checked -> Finished.

Now I tried to connect to the ftp server using Filezilla.
Everything is fine but I only have read-only access.

I searched google for this problem but nothing helped so far.
I checked folder permissions of the users Administrator/IIS_IUSRS but both should have the rights for read/write access.
I’m not very experienced with Windows server 2012 so I dont really know where to look for.

Anything I missed to configure?

asked Apr 22, 2014 at 17:12

If I remember correctly the IIS_IUSRS account only represents anonymous IIS users, but when you publish via FTP you have to log in, therefore giving read/write permissions to IIS_IUSRS has no effect in your case.

Now this is where things tend to become a bit weird. Even though you log in as Administrator (or any administrative level user you might have) that still may not be enough, because depending on the impersonation type and level, your IIS may be accessing the web site root folder as a different user.

The most common scenarios are IIS accessing that folder as «IUSR_[computer]» or as «Network Service». Please check your directory for permissions on those accounts. Granting the proper permissions to those account should (likely) solve your problem.

answered Oct 16, 2014 at 4:59

answered Oct 18, 2015 at 16:22

I know this is very old thread

just add some additional tips, in my case , just like Froggiz -san suggestion

I add permission on the folder, using right click, > properties > security
I add user and allow full control

answered Feb 18, 2022 at 3:49

asked Jul 4, 2013 at 13:37

answered Oct 1, 2018 at 7:16

In order to resolve this issue, it is required to force the System.Net.FtpWebRequest command to revert back to the old behavior of how it used to work in .Net Framework 2.0/3.5 and issue the extra CWD command before issuing the actual command.

In order to do this, the following code needs to be placed before any instance of the System.Net.FtpWebRequest class is invoked.
The code below only needs to be called once, since it changes the settings of the entire application domain.

private static void SetMethodRequiresCWD()
{
        Type requestType = typeof(FtpWebRequest);
        FieldInfo methodInfoField = requestType.GetField("m_MethodInfo", BindingFlags.NonPublic | BindingFlags.Instance);
        Type methodInfoType = methodInfoField.FieldType;


        FieldInfo knownMethodsField = methodInfoType.GetField("KnownMethodInfo", BindingFlags.Static | BindingFlags.NonPublic);
        Array knownMethodsArray = (Array)knownMethodsField.GetValue(null);

        FieldInfo flagsField = methodInfoType.GetField("Flags", BindingFlags.NonPublic | BindingFlags.Instance);

        int MustChangeWorkingDirectoryToPath = 0x100;
        foreach (object knownMethod in knownMethodsArray)
        {
            int flags = (int)flagsField.GetValue(knownMethod);
            flags |= MustChangeWorkingDirectoryToPath;
            flagsField.SetValue(knownMethod, flags);
        }
 }

http://support.microsoft.com/kb/2134299

answered Nov 6, 2013 at 21:44

Make sure target folder «outbox» exists.
That was my problem with error 550.

Simply create target directory «output» before upload.

try
        {
            WebRequest request = WebRequest.Create("ftp://" + ftpServerIP + "/outbox");
            request.Credentials = new NetworkCredential("user", "password");
            request.Method = WebRequestMethods.Ftp.MakeDirectory;
            using (var resp = (FtpWebResponse)request.GetResponse())
            {
                Console.WriteLine(resp.StatusCode);
            }
        }
        catch (WebException ex)
        {
            FtpWebResponse response = (FtpWebResponse)ex.Response;
            if (response.StatusCode == FtpStatusCode.ActionNotTakenFileUnavailable)
            {
                response.Close();
                //already exists
            }
            else
            {
                response.Close();
                //doesn't exists = it's another exception
            }
        }

answered Jul 31, 2017 at 12:30

I had this problem. Filezilla was fine, .net wasn’t. It was to a wordpress server.
To get it working, I changed the my code from this:

ftp://XXX.XXX.XXX.XXX//folder//» + txtFile.Text

to:

ftp://[FTPNAME]@XXX.XXX.XXX.XXX//» + txtFile.Text

and it now thankfully works.

I don’t know if this is specific to WordPress FTP folders.

answered Oct 25, 2017 at 9:43

In my case, there was a root folder referenced in my ftp address that was missing.
After to create the folder the problem was solved.

ftp://xxx.xxx.xx.xx:21//rootfolder/

answered Mar 16, 2018 at 18:04

I was also having the same issue. After monitoring the traffic with WireShark I understood the problem

I had set up a new FTP site on my local IIS FTP server named ‘testftp’
The ‘testftp’ site was pointing to a folder named d:ftp on my computer’s hard disk
I was getting the ‘550’ error whenever i tried to execute the line in bold in C# code below
ftpHostURL=»ftp://127.0.0.1/testftp/test.htm»;
request = (FtpWebRequest)WebRequest.Create(ftpHostURL);
request.Proxy = new WebProxy(); //——Proxy bypassing(The requested FTP command is not supported when using HTTP proxy)

            request.Method = WebRequestMethods.Ftp.UploadFile;
            request.Credentials = new NetworkCredential(ftpUserName, ftpPassword);
           // uploadFilePath = "d://test//tt.txt";
            using (var requestStream = request.GetRequestStream())
            {
                using (var input = File.OpenRead(uploadFilePath))
                {
                    input.CopyTo(requestStream);
                }
            }

I tried a lot of solutions mentioned in various websites but nothing helped. Then I came across a site that suggested to use WireShark to monitor the traffic.

On monitoring the traffic using the RawCap Utility I saw that the application was trying to execute the code below

STOR testftp/test.htm

Then I understood the problem. IIS was expecting a folder named ‘testftp‘ to be there under the ftp root folder which was not there.
I was considering ‘testftp‘ as the name of the virtual folder created in IIS where as IIS understood it as a folder under the FTP root

Creating a folder named ‘testftp‘ under the FTP root folder solved my issue.

Hope this is helpful to someone

Regards
Mathew

answered Nov 5, 2019 at 5:49

Just to throw my hat in the ring, I was getting the same error. When the FTPRequest was requesting files from the FTP Service on the same computer (same IP). In the request I was using the IP address of the machine but once I changed that to 127.0.0.1 it worked. interestingly enough, requests from other IP addresses were being processed and files downloaded, just not from itself.

Hope that helped someone.

answered Nov 16, 2015 at 1:50

When i had the same issue i tried everything above and after a day later i realize that the path which i created for uri having a white space in between «/» and the folder name

string uri="192.168.1.101/ Sync/Image.jpg";

the above string should be

string uri="192.168.1.101/Sync/Image.jpg";

this small mistake also throws the same error and it’s a valid error because this is not valid path for our file if it contains any white spaces between «/» and folder/file name

answered Sep 15, 2016 at 9:14

I was having the same problem, when i compared with the ftpuri and User Name Path it is resolved
When I create ftp access i have chose the path as /directory name

in the ftpuri when i included the directory name it gave the error and when i removed the directory name it is resolved.

ftpuri with error

«ftp://www.example.com/Project/yourfilename.ds»

ftpuri resolved

«ftp://www.example.com/yourfilename.ds»

ftp access folder
«/Project»

answered Feb 1, 2017 at 13:54