COMPRO TN1500 User Manual page 57

Symptom
The entered hostname/WAN IP address is incorrect.
Make sure you entered the correct hostname (if you use iDDNS) or the WAN(Internet) IP
address of your camera in the location field of the web browser.
The LAN network is not connected to Internet.
You need to have access to the Internet when trying to view your network camera
remotely. Equally speaking, your camera installed on a LAN network also needs to
have access to the Internet for it to be accessed remotely. Check if you can browse the
Internet on your LAN network. If not, contact your network administrator for assistance.
The camera's WAN IP address has changed but yet to be updated into DNS cache.
If you use DDNS service, the information of your camera's IP address and the domain
name the IP address is linked to is stored in the DNS cache. The cache is used to retrieve
Successful access the IP information by the DNS server which translates entered hostname into the
on local network camera's IP address. Though the information is updated every few minutes (determined
but having problem by the value of TTL, Time to Live), occasionally the DNS information changes (e.g. your
accessing from the camera acquires a new IP address) but the old information is still stored in the cache,
Internet. resulting in connection failure.
When this happens, try waiting a few minutes for the new IP information to be updated
onto DNS server and then retry connection, or try to decrease the TTL value. If it still
doesn't work, refer to other possible causes and solutions, or contact Compro for
technical support.
The router's configuration does not allow incoming traffic to the camera.
If you want to make your camera located on a LAN network accessible from the Internet,
you need to enable port forwarding on your router and allow incoming traffic on the
HTTP and RTSP port your camera is using (your router may require a reboot after port
forwarding is set). Refer to the
user manual for detailed information. If you don't know how to enable port forwarding
on the router, consult the manufacturer of your router for instruction.
Possible Cause / Solution
"Trouble with Remote Viewing on
Symptoms, Causes and Solutions
Chapter 9: Troubleshooting
Browser" section in the
9-9