3Com ADSL Router


I am using 3Com DSL Modem/Router to access to the Internet with a given public IP address to the ASDL router. I was accessing my mail server through web, but now I could not access it through internet. Would you please advise me the possible cause and also the solution.  Please also advise me the configuration related to ADSL router so that users can access some of our computers, switches and other equipment in my network from Internet.  We have only one Public IP address.

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Fatal_ExceptionSystems EngineerCommented:
Are you sure you have a Static IP Address for your DSL line?  There are basically two kinds of Public Addresses (or any address for that matter), Static and Dynamic..  If Static, it never changes, but if you have a Dynamic address, it may have changed, which very well may be the cause of your not getting access to the mail server..

BTW:  Is your mail server within the LAN or at another location?
jpGondjeAuthor Commented:
Hi Fatal Exception,

Thank you for your comment. My mail server is within the LAN. The IP address is static and used to be working properly until two days ago.

Fatal_ExceptionSystems EngineerCommented:
So, if you are located outside the LAN, coming in, you cannot pop your email server?  Are you using a Domain Name, or IP Address?  If Domain Name, try plugging the IP Address into your mail configuration...    
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I would double check the port forwarding on your router settings.  Ensure that port 25 (smtp) and port 110 (pop) are forwarded to your mail server.  

Regarding the configuration to access your local network from the internet, you will want to create a VPN.  What server software are you running?  Basically you'll want to create whatever sort of VPN you decide to run, and forward ports appropriately.  If you can tell me what server OS you are running, I can find you a link on how to set up a simple VPN.
jpGondjeAuthor Commented:
Dear Experts,

Thank you for your assisatance. I solved the problem by upgrading my router software.

The question is therefore closed.

Fatal_ExceptionSystems EngineerCommented:
very  good..
PAQed with points refunded (500)

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