I recently got a 512 kbps broadband ADSL line and want to run my own web server, ftp server and mail servers. After some reading I found out that I have to forward the relevant ports from the router to the local machine based on its internal IP.
I have done the same using the router's browser based configuration system, but it seems to be forwarding only port 80. All the other ports (21, 25 and 110) always show up as either blocked or stealth (depending on which website you use to do the checking). Even port 80 was not forwarded initially, but it suddenly started working for whatever reason.
I checked with the ISP and they claim that they are NOT blocking any port.
The config is as follows:
Router : D-Link DL-500T
ISP : VSNL, Bangalore, India
Static IP : 18.104.22.168
Domain : deltacadd.com
OS : Windows XP SP2 (yes, I have configured the firewall to unblock the relevant ports)
Webserver: Apache 2.0
Mailserver : MailEnable Standard
FTPserver : Serv-U Trial
The funny thing is that I tried this on a Linux box running Fedora Core 2 and the same result appears (i.e., port 80 is opened but the other ports are not). I have tried both the Sheids Up test at www.gcr.com
as well as Symantec's online security check. The result is always the same port 80 is open, alive and kicking whereas all other ports are "Stealth".
What am I doing wrong? Any help is greatly appreciated.