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Accessing a dynamic DNS host from the same LAN as host

Posted on 2013-01-10
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Last Modified: 2013-01-18
I have a dynamic dns account set up with no-ip.info.  

I have the dynamic update client set up on a server.  

I have the router configured to allow traffic on a specific port to workstation with a fixed ip address with an ip camera.

I can access the ip camera from outside the LAN just fine using the dynamic host name/port.

The problem is that I can't access the same resource using the same URL from inside the network on the LAN.  

I am using Comcast for my ISP,
My router is a TrendNet TEW-731BR
My cable modem is a Motorola SURFboard SB6141
DHCP is managed by my Windows 2003 Server
DNS is set to my Server & Comcast 75.75.75.75 & 75.75.75.76
DHCP is turned off on my TrendNet router.

I can ping the dynamic host OK from the LAN.  

Any suggestions?
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Question by:Gary Fuqua, CISSP
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Expert Comment

by:David Johnson, CD, MVP
ID: 38765610
internally you would use the internal machine name i.e.
\\computername\index.html
or http:\\fixedipaddress\
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Author Comment

by:Gary Fuqua, CISSP
ID: 38765699
Yes I know.   I was able to use the external host name at one point.
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Assisted Solution

by:vivigatt
vivigatt earned 500 total points
ID: 38766590
Some ISP/routers won't allow this...
Check with your ISP if this is doable.
Otherwise, there may be some solution, like conditional name resolution.
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Accepted Solution

by:
Gary Fuqua, CISSP earned 0 total points
ID: 38772970
I just added a new zone in the DNS for my no-ip.info domain, then added an A host in the zone including the fixed IP address of the camera.   Problem solved.
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Author Comment

by:Gary Fuqua, CISSP
ID: 38772976
That is the way it worked out.
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Author Closing Comment

by:Gary Fuqua, CISSP
ID: 38792328
Vivigatt, your suggestion lead me to the best solution.  Thanks.
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