followed this for setting up ftp server on iis. But fails thru VPN. What to do?


I followed this link for setting up ftp server on iis for anonymous authentication.

This works fine without any VPN but once the target machine is under cisco anyconnect VPN, i receive ftp connection timeout due to inactivity VPN in filezilla client.

So, is it the firewall settings or is it VPN server settings that needs to be handled?
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JohnBusiness Consultant (Owner)Commented:
FTP server on IIS for anonymous authentication.

Check to make sure Active / Passive FTP is set up correctly.
Dan McFaddenSystems EngineerCommented:
What VPN client are you using?  Is your VPN client pushing some sort of policy that forces firewalling or application blocking to be enabled?

jazzIIIloveAuthor Commented:

I didn't do anything about passive mode as it sounds it needs extra ports other than 21. Am i right?

I am using cisco anyconnect mobile client. I don't know whether there is a setting or not regarding your question but isn't such policies getting setup on VPN server end? How can i know about those? I have no access/control on the VPN server.

Dan McFaddenSystems EngineerCommented:
First off... FTP is defined with 2 TCP ports.  20 & 21.  Passive FTP just means that after establishing a valid connection, the client & server will negotiate continuing the session on other higher tcp ports.

Active means the sessions stay on ports 20 & 21.

If you don't have control over the vpn server, I suggest you speak with the admins that do manage it, to find out what happens during a VPN session.


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JohnBusiness Consultant (Owner)Commented:
@jazzIIIlove  - Thanks and I was happy to assist.
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