I’ve just setup a Mikrotik router and had everything working fine. Then I added a port mapping to forward port 80 to a web server on the LAN. Now internet access for users on the LAN is sporadic, with several web sites failing to load in the browser (but not all of them all the time). I tried disabling the www service on the router itself using winbox. That did not help. Only removing the port 80 port mapping seems to resolve the issue. Help?
Yes, you do port forwarding wrong, if you do not try to do that on wrong way, al works.
Ignoring security and other frills:
/ip fire nat
add action=dst-nat chain=dstnat dst-address=wan_public_ip dst-port=80 protocol=tcp to-addresses=internal_server_lan_ip to-ports=80
I did the port mapping with Winbox UI. Does it not do the same thing as the command line? I’m not to familiar with the command line but I will look into it with the help of the above reply.
Exactly same parameters, same fields.
The commands are (not really everytime) interchangeable.
Move the NAT rule on top of all other NAT rules.
Problem solve with command line. Thank you! User beware: The “Port Mapping” button in the “Quick Set” UI of Winbox does not do what we needed.
Everytime provide full details…