Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I am having issues writing to my FTP site ... I am able to connect to the site using my FTP client. I have given the user account READ/WRITE authorizations inside of the IIS Web Site (which also handles FTP Publishing). I have also given the user account full control to the folder through the Security settings.

What am I missing? Because I can connect and browse the directories no problem ... I am leaning towards a permission issue.

Any help would be much appreciated!

Here is the actual error message I receive using FileZilla:

Status: Starting upload of C:\Temp\Global.asax
Command:    PASV
Response:   227 Entering Passive Mode (64,34,179,104,207,165).
Command:    STOR Global.asax
Response:   550 Access is denied.
Error:  Critical file transfer error

This is a virtual server outside of our network ... hosted by another vendor. Internally we pass through a TMG server, and on the virtual server the Firewall is running ... I've tried turning it off ... but still have the same problem.

share|improve this question
Is there an actual error message? – MichelZ May 23 '12 at 18:02
That might help! :) Just posted the error message. – mattruma May 23 '12 at 18:24
Are you by any chance going trough an ISA Server? – MichelZ May 23 '12 at 18:26
What version of IIS & OS are you using anyway? – MichelZ May 23 '12 at 18:27
Internally TMG server ... site is hosted on an External web server with Windows Firewall running ... Windows Server 2008 R2 and IIS 7.5. – mattruma May 23 '12 at 18:30
up vote 3 down vote accepted

Make sure your TMG does not have the Read-Only flag set on outgoing FTP Connections:

share|improve this answer
That did it! Thanks a ton! Didn't realize that out of the box TMG does not allow write/delete/upload access via FTP, we had to add the rule, then follow what that article said ... thanks again! – mattruma May 23 '12 at 19:05
the link does not work / is password protected. Please provide a link that works. – spankmaster79 Apr 15 '15 at 9:22
You could just google for TMG ftp read-only, but aparently that's too much for sysadmins nowadays. I'll post another link. – MichelZ Apr 15 '15 at 10:01

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.