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DLink DSL-2640R

Posted on 2009-12-24
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Morning,

I brought a DLINK DSL-2640R and I want to know if it supports external port forwarding to internal port forwarding.

Example:   Ext 30000 to Int 5559
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Question by:richard_gar
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by:richard_gar
ID: 26118700
I have two PC's on the network both PC's are hosting a program which I need to retirve data from on port 5559 on both PC's.

Example:

192.168.3.1  Ext 3000 Int: 5559
192.168.3.101 Ext 3001 Int: 5559

I can add the first PC but the 2nd one gives me Error
ERROR: FAIL TO UPDATE DUE TO... DUPLICATE PORT NUMBER !
 
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uucknaaa earned 2000 total points
ID: 26120280
Well ..

Without underestanding much about your application, I wonder why it cannnot use two ports if that;s what it would use in native mode.  I mean, if you had a host sitting on the internet without any firewall, it would just use ports 3000 and 3001, right.  Why does it need individual ones behind the router?  About the only solution I can come up for this is enabling the DMZ feature.  Here's how that is done with your router:

http://www.dlink.co.uk/cs/Satellite?c=TechSupport_C&childpagename=DLinkEurope-GB%2FDLTechFAQ&cid=1197331381288&p=1197318962300&packedargs=locale%3D1195806691854%26packedargs%3Df9ffeaf4e83ab6d02711161af1b5c6f632171b988fa46b92323573a67344a5ca5435e39ad1c7cf11b43ff56b09f24cde&pagename=DLinkEurope-GB%2FDLWrapper

Then, since all ports will be open, you can just use the two, 3000 and 3001.  There are a ton of security issues with this mode of operation.

Let me know what you think and if questions.
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