Trying to set up an FTP connection.?

Question

I have a Dell Inspiron at my office. I have installed Ubuntu 9.10 Server Edition with a LAMP. I can connect to this computer fine when I am local, but when I try to connect to this computer from home using an FTP Client (Filezilla) I can't. I have my Comcast Modem/Gateway, from there it goes to my Linksys Cable/DSL Router. Plugged into this Router is the computer.

On the router I have ports 21,22, and 80 forwarded to the IP address of the computer. I can't get those same ports forwarded from my Comcast modem to that IP address.

I am unable to connect to this computer from outside my office. Does anyone know what the problem is? Thanks!

Answer 1

The last time I checked, Comcast doesn't allow servers, so more than likely they have the ports blocked inbound. If you need to run a publicly accessable server, you need a "business class" connection, nearly all ISP's have prohibitions in the terms of service against running servers on residential lines! ATT, Comcast, Charter, and nearly all the big ones don't allow home based servers so make the phone call.



If you have a "gateway" that should be a router as well, running two routers to reach a server usually doesn't work well unless you know exactly how to configure them both! The best solution would be to put the "second" router into the DMZ of the "Gateway". Everything inbound will be sent to the second router, you can then port forward on the second router as needed. (If the ISP isn't blocking the ports.) If it were me, the server would be connected to the FIRST router in the system not a secondary.

Answer 2

Firewall. Servers Firewall. Password incompatibility. Your server would not enable that application. Your server demands using an ftp agent which includes ftp commander(does that still exist?). Your installation your individual server and port 80 is closed. you have undesirable Mojo in the present day and could attempt lower back later. etc. those may be the main probable even with the undeniable fact that.

Answer 3

To test if your ISP blocks those ports, try other ports on your LAMP server, like 8080 for web, 2121 for FTP. If those work (after forwarding), then it is your ISP that is blocking the common "server" ports. If it does not work either way, then something else is wrong with the LAMP config or your method of accessing form the outside world, like forwarding, etc...



To change ports, you have to change the configuration of the Apache server "listen" port, as well as the FTP's listen port.... then restart LAMP.