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You may also check on the anti-virus or security software. i know Norton will block the video stream before you give up some kinda permission.

well..u can check CPcam they sell AVtech DVR http://www.cpcamcctv.ca

hmmm...what's happened before the machine turning like this? do you using the regulated 19V power adopter from the box?? wha't the HD inside?

I know, but that still haven't answer my question. The product claim that it support DDNS services, the service is there, but just can't get it to work. Reason's some of the customer already have adsl modem cum router. Their existing router doesn't support DDNS. Proposing changing their ADSL modem cum router would mean increasing cost for them, and then also having to reconfigure their internet access for them. That would mean libility on our part as we had change the internet gateway for them. If the DDNS on the DVR doesn't work, shouldn't it be removed from the product brochure/specs ? The avtech support had given me instruction to set it up, but guess wat, the instruction stated configure the DDNS services on the modem/router. In this case/defination, all network dvr in the market can put themselves as supporting DDNS services. Had asked for further clarification, but since april till now had not receive any other replies. Had tried enabling/disabling it quite a number of times already, no use. Don't really dare to sell this feature to customer coz i don't have any confident of making it work. write an email to CPcam. they do have tech support in U.S. and Canada. support@cpcamcctv.ca or just phone them for support: 1-778-219-9970

Yes, that's what i did. The serverlog in the ap shows "DDNS FAILED TO UPDATE", and i check the ddns services, it doesn't reflect the new ip as well. try to disable and enable it again. that works for my machine. if you receive "DDNS failed to update" all the time, check your ip address. AP can't update DDNS information, if the ip address hasn't changed.

You can use the application software (AP) to setup DDNS service. After launch the AP, then click on system conf icon. under Network section, choose DDNS submenu. then key in those DDNS login info. After that, DVR will update the ip info to DDNS server automatically