Hi.. I have a router and using wireless network to share the internet
in my house.. I have been trying to use an ftp server on my computer
to be able to reach my computer remotely to transfer files.. I want to
use a browser to reach my computer.. I have an ftp server on my
computer which seems to be listening to the port 21.. I know it was
not necessary but I have forwarded all the ports to my local ip
address and enabled DMZ hosting for my ip in the router.. I still cant
connect to my computer.. I can do it using my local LAN ip address
which is useless.. I coulndt figure out what I am doing wrong.........

-Network Connections
-Right click on wireless connection
-Go to properties
-Make sure the firewall option is not checked in the connection properties

I am noy sure what you meant.. In the properties, in the advanced
section there is only windows firewall and it is off... But in Windows
Firewall settings, in the advanced section apparently firewall was
enabled for all of my network connections.. I unchecked them all.. It
still is not working.!

Are you able to access your machine (any port, ping?) from the other network?

What do you mean by the other network?! When I type
ftp://ipaddress:port , ipaddress being my LAN ip and port being 21, I
can connect my computer.. I havent tried it from other computers in
the network.. When I use my router's ip instead of my LAN ip it doesnt
work.. Again I havent tried it from other computers..

you won't be able to access your pc on your local network in the same
that you do from outside until you modify your "hosts" file.  It is
very easy though, get the internal IP of the computer with FTP Server
on (do this by clicking Start then clicking Run then type "cmd" or
"command" without the "", then type "ipconfig" again without the
speechmarks you should get something up that says along the lines of
192.0.0.2 - this is your IP) now on the pc you want to ftp from do a
search for "hosts" (C:\WINDOWS\system32\drivers\etc" in Win XP; when
you have found it open (you will need to use "open with") it in
Notepad you should see something like
# Copyright (c) 1993-1999 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.

etc at the bottom of this file create a new line and type the IP
address you found earlier followed by whatever you will use to access
it externally eg

192.0.0.2   myExternalFtpAddress.com

You will now be able to see this in the same way as everyone else can
on the Internet. :)

I dont understand why I need to do these stuff.. Is it that difficult
to connect a computer, which has an ftp server installed on it, using
a browser?! I havent tried it on other computers in the my local
network but I am sure it works just fine.. The problem is I wont be
able to reach it outside the network.. I want to be able to reach it
from anywhere I want, including the university computers on which only
the browser can be used.!

Hello, an optional for you. If you just want to use the FTP to sharing
file between your pc, why don't you try a software named
"wwwFileShare" http://www.wfshome.com/ . It act as an FTP and let you
to download and upload data ^^

You need to use the WAN IP address instead of the local one. 192.168
address are reserved for internel use through NAT. To find out the
actual IP address of yoru router that is visable to the world, you
need to access it though a web browser inside your network and get the
IP address that way. It will be labled as the WAN ip address.

I know my router's ip address.. I tried it and it doesnt work.. Even
my local ip address doesnt work within the network.. When I try my
local ip it asks for the password I put but even though I enter the
right password I cant get permission.. When I try it with my router's
ip it doesnt even ask for the password, I just dont get permission..
The only thing that works is when I try to connect the computer from
itself.. I enter my own local network ip on this computer and it asks
for the password, then I get permission...

My advice:
1. disable the personal firewall (at least temporarily)
2. for testing purposes use command line and ftp command - this will
show you if you can connect to ftp service at all or not (you should
be able to see a welcome banner). Also let us here know if the problem
is with connecting or logging in :)
3. "enabled DMZ hosting for my ip in the router" sounds misterious to
me. Make sure you need this option. Launching the FTP service and
redirecting TCP 21 on the router should be all you need.
4. Make sure you use static addresses (both on your "server" and
external router interface).
5. For connections within LAN use local address (bypassing the router)
and for connections from Internet use routers address. Dont mix these
addresses or thez wont work.

I called a friend to try it and it worked fine.. He entered the
username and password and he could transfer files.. The interesting
thing is it doesnt completely work in my local network.. Thats why I
didnt try it outside the network since I thought if it doesnt work
inside, it wouldnt work outside.. It is actually possible that it was
working even before I asked the question.. I had thought that I could
try using my router's ip on a computer in my network and get the same
result as I was using a remote computer.. Well it seems that I am
wrong and I wonder why?!

The reason I said it doesnt completely work in the network is that the
other computer can log in using the command line but when we use the
browser it just asks for the password but doesnt give permission.. Why
would that be?!

Also from your message I get the idea that port 21 in the router has
to be forwarded for that purpose.. What if another computer in the
network wants to install an ftp server too?!

For your last problem
you can log in your router ,and you can in virtual server set page
(may is the name) set the port which is for remote user use ftp
cient,and the ip and port of the ftp server which in local.