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Dynamic DNS Setup Help

Chat TranscriptDynamic DNS is used in surveillance system applications when your Internet connection uses a dynamic IP address.  CCTV Camera Pros JPEG2000 and JPEG2000 + H.264 dual codec DVRs has a dynamic dns service built into it so users have a choice of using the interface on the DVR or if their router supports Dynamic DNS, their router can be used to interface with services such as  The below chat transcript covers this topic.


Customer: I have your JPEG2000+H.264 DVR surveillance DVR.  It is connected to a router which is connected to a cable modem.  The IPs are assigned dynamically.  The manual talks about going to to setup DDNS.  On your web site I see talk of going to and doing port forwarding on my router.  Which way is best?  If I use can I view DVR over internet with that sites viewer or do I still need to use the IRS?

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CCTV Camera Support: Hi Customer.  Both the j2kip and method work well.  Some installations and networks have routers that do not support dynamic dns so they must use the j2kip interface built into the DVR.  Yes, you still use the IRS with j2kip DDNS.

Customer: Ok. My router does support ddns so should I go that route and setup port forwarding?  My router is the same one used in your examples, Linksys WRT54G.

CCTV Camera Support: The linksys routers seem to do well in keeping the DDNS up to date so that should be fine.  On a side note, one downside to linksys routers is that they do not support static internal IP addressing  so after you obtain an IP address on the DVR in automatic DHCP mode, set the router to manual DHCP.  That is what I normally do when setting up a DVR with a dynamic IP Internet connection.  Detect IP automatically, then set to manual on the DVR.

Customer: but that means I would have to assign manual addresses to all my other devices on my network right?

CCTV Camera Support: No, I am not an expert on DHCP but I believe that the router first checks with all devices to see if any have requested specific IPs on a router reboot.  One thing I like about D-Link routers is they support static IP addresses for the LAN.  I am not sure why linksys does not support this.

Customer: Well, I'm not that smart with all these stuff either.  Is it easier if I go the j2kip route then?

CCTV Camera Support: for the dyndns, they are equally good.  for a linksys router I would use .

Customer: and the port forwarding then on my router right?

CCTV Camera Support: correct

CCTV Camera Support: last some routers have a problem with port 50000.  it is too high for some.  if that is the case with yours, use 8000.  if you need to set the port of the DVR to 8000.  Power it down then back up after you change the port.

Customer: that is what the DVR defaulted to.  I tried to change it to 50000 and it didn't take.  Both 5000 and 8000 seem to work on DVR with IRS.  I didn't have to power down.

CCTV Camera Support: ok good

Customer: The viewer component in IRS doesn't seem to retain the connection.  The other pieces seem to work fine.

CCTV Camera Support: the transmitter is a better viewing application.  with the H.264 DVR, I recommend it over the DVR viewer

Customer: yeah, seems to be.  Well, I will give all this a try.  Thanks for your help.

CCTV Camera Support: Your welcome