We have been using Serv-U for many years running on Windows XP in application mode and recently ran into a strange problem that has us stumped. Here's the background.
We are currently running version 14.0.2.0 of Serv-U Corporate. We have network drives mapped to a couple different servers on the XP machine hosting Serv-U with different users and everything was working perfectly up until last weekend.
The initial symptom was one of our users who accessed a particular server (only a couple of users access this particular server) reported that she could connect to the FTP server but then the browser would hang and she'd get a page not found. We also had her try with FileZilla and she was able to connect but when FileZilla requested the directory listing it hung there for a minute and then reported it was unable to get the directory listing and timed out. Switching this user to a differnet home directory alowed her to connect fine.
To troubleshoot, we tried to set a different user account to point to the mapped drive on that same server and were able to assign the access to the root and choose the root as home folder and that user then got the same response both from internal sources (on the same network as the FTP server) and external. Also, when we are in a user account and attempt to add a subfolder of this network drive for access or as home folder, we cannot browse to that mapped drive and entering the path directly results in an error indicating that the user cannot browse to that location.
We double-checked that the FTP could browse to those folders with the logged on user so the issue seems to be sprcific to the browsing function in Serv-U. We looked at the server hosting the share (Running Windows Server 2003 R2 Standard) and noticed a warning in the security log indicating a logon failure from the IP address of the FTP server although the user account we logon with logs in successfully.
While this appears to be some sort of security related issue, since it only effects Serv-U and only with one server and since it worked fine just last week and nothing has changed on our network or the servers, we really don't know where to look from here. Can anyone offer any suggestions. Is there any debug logging available in Serv-U that might give us more information on the root cause?
Thanks in advance.