To view the port 37777 tcp is enough, if there are many cameras behind the router, then you can forward the ports 37779 tcp, 37979 tcp, etc., while the ports must be changed to the same ones on the cameras. to address / mask Network address to map to. It can only be used from rules in the nat table. To Addresses: 192.168.88.1 (internal router ip)įor example, to DVR Dahua you need to forward ports: 80 tcp, 554 tcp, 37777 tcp, 37778 udp. The IPTables target you want is NETMAP: This target allows you to statically map a whole network of addresses onto another network of addresses. So far, the documentation lets me think that I could use NAT 1:1 for this purpose, even if usually it's used to allow public IPs to be accessible in LAN. I thought to use NAT 1:1 configuration + virtual IPs, but I cannot achieve the target configuration with OPNsense. Address: 192.168.88.0/24 (internal network) Now your ISP will see all the requests coming with IP 172.16.16.1 and they will not see your LAN network IP addresses. I could connect to a virtual IP of 10.181.1.100 and be NATed to 192.168.1.100. To access the external IP of the router from the local network, you need to add two more rules. I will give several examples of ports: 3389/tcp – remote desktop, 80/tcp – web server, 23/tcp – telnet, 161/udp – snmp, 22/tcp – SSH, 1433/tcp – MS SQL Server, etc. To Addresses: the IP address of the network device/computer within the network from which you want to forward ports, for example 192.168.88.250 This type of NAT is performed on packets that are originated from a natted network. There are two types of NAT: source NAT or srcnat. interface: the incoming interface on which the above port is listening, for example “ether1-gateway”. The NAT gateway (NAT router) performs IP address rewriting on the way a packet travel from/to LAN. Port: destination port that will be visible from the outside (1 – 65535). Chain: dstnat (means that the connection will go from the external network to the internal).ĭst.
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