[ANSS-netops] Operating multiple reftek recorders behind a single static IP.

[Dave Drobeck]

Hi Steve,
We have multiple locations with multiple dataloggers behind one IP - 
just not multiple Refteks for the reason you state - everything is UDP 
2543.  Need somebody smarter than me to figure that one out.  The router 
we use for port translation is

http://www.cdwg.com/shop/products/Cisco-RV042-4-port-10-100-VPN-Router-Dual-WAN/654632.aspx

it's been very reliable for us, and listed here as $170.  If you need 
more physical ports a switch can be inserted.

Dave

Stephen Brewer wrote:
> Hello, I would like to ask how others may have dealt with this.
> 
> We have a situation which calls for the operation of several refteks, 
> behind a single static IP, DSL service. It is my understanding that the 
> port numbers used for communication with the refteks, are not 
> configurable. Is this really the case? If communication port numbers 
> could be changed, the problem would be solved.
> 
> Another possibility would be to place some sort of router/firewall, 
> capable of port translation, between the DSL modem and refteks.
> Has anyone ever done anything like this?
> 
> We have some small experience here, with the CISCO ASA5505 (Adaptable 
> Security Appliance). This is a small, 8-port router/firewall, that I 
> think would be capable of doing the port translation. The cost of such a 
> unit though is about $600. Is anyone aware of a cheaper, more "consumer" 
> grade product that could do this?
> 
> A related question. Are the port numbers used by the various outside 
> programs that talk to the reftek configurable?
> If not, then a similar firewall/router would be required at both ends.
> 
> Any thoughts or suggestions are appreciated.
> 
> thanks, steve.
>