check the port forwarding on your router. if you are coming from a Linux/OSx computer you can also use nmap to check the ports that are open. it will not show you if the port if properly forwarded, but will display if the port is open:
from inside my office LAN, this is what I get when I nmap my company URL.
Code:
[ray@ray /stuff/backup]$ nmap rx30.com
Starting Nmap 6.00 ( http://nmap.org ) at 2012-08-14 16:56 EDT
Nmap scan report for rx30.com (192.168.200.88)
Host is up (0.074s latency).
Other addresses for rx30.com (not scanned): 10.10.0.20 10.10.0.21
rDNS record for 192.168.200.88: poseidon.rx30.com
Not shown: 981 closed ports
PORT STATE SERVICE
42/tcp open nameserver
80/tcp open http
88/tcp open kerberos-sec
135/tcp open msrpc
139/tcp open netbios-ssn
389/tcp open ldap
445/tcp open microsoft-ds
464/tcp open kpasswd5
593/tcp open http-rpc-epmap
636/tcp open ldapssl
1028/tcp open unknown
1029/tcp open ms-lsa
1068/tcp open instl_bootc
1095/tcp open nicelink
3268/tcp open globalcatLDAP
3269/tcp open globalcatLDAPssl
3389/tcp open ms-wbt-server
5666/tcp open nrpe
27000/tcp open flexlm0
Nmap done: 1 IP address (1 host up) scanned in 1.46 seconds
again do keep in mind this is the LAN side view of that URL. a better example might be this web site:
Code:
[ray@ray /stuff/backup]$ nmap ssma.us
Starting Nmap 6.00 ( http://nmap.org ) at 2012-08-14 16:57 EDT
Nmap scan report for ssma.us (69.28.72.76)
Host is up (0.019s latency).
Not shown: 999 closed ports
PORT STATE SERVICE
80/tcp open http
Nmap done: 1 IP address (1 host up) scanned in 0.66 seconds
clearly the only port open is port 80, the port needed to view that URLs web page information.
Unable to access My Apache Server from internet
