DVR PROBLEM WITH MIKROTIK ROUTER

Hellow everyone, I’m new to mikrotik router pelase help me out i have connected my DVR with mikrotik router. It is accessible within network but when i want to access through internet then its says no page is available… I used all the method and configuration that are available on google but no positive acheivement.. please help me

You need to forward ports from public ip to your local dvr ip.:
Example :
Public IP = 1.2.3.4
DVR Local IP = 5.6.7.8
DVR Local http Port = 1234
DVR Local RTSP Port = 1235
DVR Local Mobile Port = 1236

Your rule for above example will be :

/ip firewall nat
add action=dst-nat chain=dstnat comment="DVR http Forwarding" dst-address=\
    1.2.3.4 dst-port=1234 protocol=tcp to-addresses=5.6.7.8 \
    to-ports=1234
add action=dst-nat chain=dstnat comment="DVR RTSP Forwarding" dst-address=\
    1.2.3.4 dst-port=1235 protocol=tcp to-addresses=5.6.7.8 \
    to-ports=1235
add action=dst-nat chain=dstnat comment="DVR Mobile Forwarding" dst-address=\
    1.2.3.4 dst-port=1236 protocol=tcp to-addresses=5.6.7.8 \
    to-ports=1236

Change wan/local ip and ports as per your configuration.