Serv-U FTP

omg its nlm

lvl 17 Hax
10 Jan 2004
I have been having some problems with Serv-U ever since I have hooked up my router. I have ports 20 - 21 open. My router has a built in firewall and I am also using zone alarm. I have tried passive mode and that does not work. There must be some step I am missing. Can someone help me out?

with passive mode have you told Serv-U to respond to your WAN IP address?
What router is it ??

In order to make it work you have to have the passive port range forwarded as well as the regular ports. The only time Zone Alarm will come into affect is if someone you want to get in tries to. There will be a pop up asking you to give axx to serv-u daemon. Once you say yes it is good from then on on.

Now for the router. When you set up Serv-u it's kinda tricky depending on what router you are using. Either way though two things remain clear. You must forward the regular ports, and you must forward the passive ports. Having port 20 and 21 open is correct. Now you have to forward the passive ports.

When you set the ftp up you have to do a couple of things to it. Things like set the dynamic dns information, this isn't really needed, but if you don't want to give your ip out every time it changes you can do this and go to, and get a redirect. Allow passive range with your wan ip, set the passive ports in the server to coincide with the passive ports you opened. and the major thing, do not enable dmz. Of course you probably already know that if you do that there is no point in using a router. You can use other ports instead of 21, depending on what router you are using of course. I am using netgear with mine and I am using 7007 and 7009.

If by chance you do have a linksys here is a link to help. It goes more in depth with what I said -> The setting work with other routers as well if you don't have a linksys. It's general information basically but affective.. Good luck and if you have any probs let me know ..
1. Set the router to forwars port 21.
2. Set the router to forward a port range for passive mode. Take a few, say 30000-30100.
3. Set the Serv-U to use this range of ports for passive mode (PASV)
4. Set Serv-U to listen to you external IP (not 192.168.*.*).

And you're done. Port 20 isn't needed. Good luck. :)
Zedric said:
4. Set Serv-U to listen to you external IP (not 192.168.*.*).

And you're done. Port 20 isn't needed. Good luck. :)
If you select use any ip available it will work better.

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