Serv-U FTP server permissions problems

Serv-U v6.1
XP Pro SP2
Windows Firewall enabled (exception on port 2121)
Linksys Wireless router (port forwarding on port 2121)




This is the error I am getting while trying to access the FTP server from outside the router:


An error occurred opening that folder on the FTP server.  Make sure you have permissions to access that folder.

Details:
Operation timed out





Now, when I try to hit the server from the outside (with a laptop) and simultaneously look at the server (on the desktop PC) to see what the logs say, it shows that I am logged in.  But, it never actually shows any folder.  The little flashlight just keeps searching and searching until it times out.  I thought this might be a firewall issue, but since Serv-U shows me as being logged in I am a little confused.

Is it safe to say that this is no longer a network issue, and really is a permission/file path issue?


quicksilver98Asked:
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sirbountyCommented:
I've found that forwarding 20-21 works best...try that under linksys & xp's firewall...
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Dushan De SilvaTechnology ArchitectCommented:
Please check your ftp protocol timeout at FTP server.

BR Dushan
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quicksilver98Author Commented:
The timeout is set to 300 seconds from what I can tell.  I actually just changed everything back to port 21 and it didn't seem to make a difference.

Also, It doesn't seem to matter whether I am inside the router or not.  It is doing this on every machine I have tried, inside the network and out.
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Scott AndersonPrincipal Support EngineerCommented:
Have you taken a look here??

http://www.rhinosoft.com/knowledgebase/KBArticle.asp?RefNo=1044&prod=su

Also, since you are seeing this inside your firewall,  check the Serv-U permissions on the default folder.  At minimum you need Read & List perms on the folder...

Scooter
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sirbountyCommented:
quicksilver98 - in Linksys, forward ports 20-21.  In XP ICF, forward ports 20-21, in Serv-U, use port 21.
I have mine setup like this and it works fine...
I don't think it's permissions...
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quicksilver98Author Commented:
I gotta admit, I was a little skepitcal on sirbounty's advice, but it turned out to be that simple.  Switching back to port 21 worked.  Why?  I have no idea, but it worked.  Very strange.

Thank you everyone for your help.
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sirbountyCommented:
It has to do with the type of FTP you're using...known as "Active FTP".
It uses the two ports, (the command & data port, as they're also known as) to setup and initiate the transmission.

Read more, if you're curious, here: http://slacksite.com/other/ftp.html
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quicksilver98Author Commented:
Thank you sir.  That is a big help.  Especially for someone like me, who is new to the world of File Transfer Protocol.
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