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NAT Inside Interface to OutSide Interface

Stephen Robertson

Good Evening, I am running 3CX.  My internal network is 172.16.10.0/24, but external is 192.168.0.0/24.  I need to NAT 172.16.10.14/24 port 5001 to 192.168.0.50.  I was able to get 192.168.0.50 active however it was only taking me to my XG for signin vs actually NAT'ing my internal device.  Please help



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    Correct, 3cx is internal, I have 4 dell servers in my lab, I have 3cx running on debian internally.  I have to NAT that internal to external and open up port 5001, that way I can connect into their cloud service as well as hook it into Office 365 externally.  I would do a port translation on my edge router.

     

    Basically I have a router, (internet provider), connected to a dude router, on the dude router I have my external interface for my firewall and one other device, this allows me to physically connect other devices in a dmz that I don't want to use the firewall for.  I just need to NAT it externally the cloud 3cx side to hook into it

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    Correct, 3cx is internal, I have 4 dell servers in my lab, I have 3cx running on debian internally.  I have to NAT that internal to external and open up port 5001, that way I can connect into their cloud service as well as hook it into Office 365 externally.  I would do a port translation on my edge router.

     

    Basically I have a router, (internet provider), connected to a dude router, on the dude router I have my external interface for my firewall and one other device, this allows me to physically connect other devices in a dmz that I don't want to use the firewall for.  I just need to NAT it externally the cloud 3cx side to hook into it

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  • 0 in reply to Stephen Robertson

    Hi Stephen,

    a better way to achieve what you are after is the following firewall rule.

    LAN - > 3CX(IP address) -> WAN -> dude router (IP address) - > 5001 -> allow -> log.

    You will not need a NAT between the 172 and the 192 address networks.

    You will more than likely run into debugging issues with the VoIP because VoIP does not like double NAT which I assume you will have with your dud router and your ISP router?

    Ian

    XG115W - v20.0.2 MR-2 - Home

    XG on VM 8 - v21 GA

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