I have 2 ftp servers running at home behind my d-link n150 wireless router. I am using the Virtual Server functionality to forward public port 21 to an internal lan ip and private port 21. I am also attempting to forward public port 24 to a different internal lan ip, but again on port 21. Both computers have ftp servers that listen on port 21 by defatult. The port 21 forward works fine by itself. When I try to add the port 24 instance I get an error about using the same port. I thought tjat as long as I forwarded the public port to a different internal lan ip I could use the same private port? Am I doing something inherently wrong? Thanks for any help... 8-)
Ok. Understood. Thanks for the quick response. I changed pure-ftpd to use port 42 (puppy linux 5.2 system) and set that port up public and private in the router. That seems to work ok. But maybe you could help me with one funny problem I have encountered. The router instructions regarding the Virtual Server List say to "Enter a name for the rule or select an application from the drop-down menu. Select an application and click << to populate the fields." If I select "FTP" from the drop-down menu, everything works fine. But if I type in anything except "FTP" in that field, the virtual server function doesn't seem to work. I've tried using "ftp" (no caps), FTP1, FTP2, etc and none of those work. But if I used the drop-down to go back to the original "FTP all is well. As a test I also tried selecting "TELNET" from the drop-down and then changing the ports as desired, but that didn't work either. The problem is that I have ftp servers running on several computers and if I try to use the "FTP" instance from the drop-down more than once the router gives me an error. So I would like to enter FTP1, FTP2, etc. Should the "Name" field really make any difference? What function is looking at it or cares about it?
So wouldn't you think I could use any name I want? For some reason the virtual server function doesn't work for my ftp unless I either type in "FTP" exactly or select "FTP" from the drop-down. Very frustrating! But thanks for taking the time to ponder it with me. ::)