How to Configure Passive Port Range for the FTP Service in IIS

The PASV dynamic port range for FTP service in IIS Web Server base on Windows dynamic port setting.

You can query default port range setting follow this command :

netsh int ipv4 show dynamicport tcp

netsh int ipv4 show dynamicport udp

If your windows is early then windows server 2008 or windows vista , the range will be 1025 - 65535

You can change this dynamic port range follow this command :

nsetsh int ipv4 set dynamicport tcp start=50000 num=10000

if you need keep this setting then add persistent command :

nsetsh int ipv4 set dynamicport tcp start=50000 num=10000 persistent

or keep until next boot(default) :

nsetsh int ipv4 set dynamicport tcp start=50000 num=10000 active

and query again:

Now , your FTP PASV port range will be limit in 50000-59999.

Note : Change this range maybe limit other windows service dynamic port at same time.

Reference :

電波幻想