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C3000-100NAS remote access

bbryan
Tutor

C3000-100NAS remote access

I have three computers on my network in my business. I use a C3000-100NAS Router/Modem. I want to connect to them using Remote Desktop from other locations. They all three have static IP addresses. I can forward Port 3389 to one of them and make the connection. However since you can only forward the port to one IP I can not access the other two computers. I think Port Triggering is the way to go, but not really sure if that will allow me to access all three remotely. I use Remote Desktop App and apparently are restritcted to that particular port.

Message 1 of 3

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antinode
Guru

Re: C3000-100NAS remote access

> [...] They all three have static IP addresses. [...]

 

   LAN IP addresses?  Do you mean actual static addresses (configured on
the computers themselves), or reserved dynamic addresses (configured on
(the DHCP server on) the C3000 router section)?

 

> [...] I can forward Port 3389 to one of them [...]

 

   True, but you can forward other ports to the other two systems (or,
as I'd advise, to all three).

 

> [...] I use Remote Desktop App [...]

 

   On what, another Windows system, or a Mac, or some other?

 

> [...] and apparently are restritcted to that particular port.

 

   Not so.  You can specify a different port number in the "PC name"
field where your connection is defined.


   You might, for example, specify port-forwarding rules like the
following (all TCP):

 

             Ports
      External   Internal   Server Address

        14389       3389      PC1_LAN_addr
        14390       3389      PC2_LAN_addr
        14391       3389      PC3_LAN_addr


   On the client side, you'd specify a "PC name" like:

 

      <your_public_IP_address>:14389
      <your_public_IP_address>:14390
      <your_public_IP_address>:14391

 

   When exposing a well-known service like Remote Desktop to the outside
world, I would not use the default port (externally).  Why make it
easier for a lazy attacker to guess the right port?

 

   I believe that it's also possible to configure the Remote Desktop
server on each system to use a non-default port, but I'd prefer to keep
things simple for intra-LAN communication, and let the router translate
the odd-ball external port numbers for external traffic.

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Message 2 of 3

All Replies
antinode
Guru

Re: C3000-100NAS remote access

> [...] They all three have static IP addresses. [...]

 

   LAN IP addresses?  Do you mean actual static addresses (configured on
the computers themselves), or reserved dynamic addresses (configured on
(the DHCP server on) the C3000 router section)?

 

> [...] I can forward Port 3389 to one of them [...]

 

   True, but you can forward other ports to the other two systems (or,
as I'd advise, to all three).

 

> [...] I use Remote Desktop App [...]

 

   On what, another Windows system, or a Mac, or some other?

 

> [...] and apparently are restritcted to that particular port.

 

   Not so.  You can specify a different port number in the "PC name"
field where your connection is defined.


   You might, for example, specify port-forwarding rules like the
following (all TCP):

 

             Ports
      External   Internal   Server Address

        14389       3389      PC1_LAN_addr
        14390       3389      PC2_LAN_addr
        14391       3389      PC3_LAN_addr


   On the client side, you'd specify a "PC name" like:

 

      <your_public_IP_address>:14389
      <your_public_IP_address>:14390
      <your_public_IP_address>:14391

 

   When exposing a well-known service like Remote Desktop to the outside
world, I would not use the default port (externally).  Why make it
easier for a lazy attacker to guess the right port?

 

   I believe that it's also possible to configure the Remote Desktop
server on each system to use a non-default port, but I'd prefer to keep
things simple for intra-LAN communication, and let the router translate
the odd-ball external port numbers for external traffic.

Message 2 of 3
bbryan
Tutor

Re: C3000-100NAS remote access

Thanks for the information, was able to configure my system with your help. Solution worked.

Message 3 of 3
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