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

[Antonio Sanchez]

Dear Friends,

Any of the routers listed will do,  I just wanted to add a little bit
more on the NAPT non NAPT routers.

The key here is that for the REF TEK's the destination port for data
will always be 2543 but the source port created is different for each
one of them and that is something the router will handle automatically.
That port will remain open to receive acknowledgements and other details
for a certain period of time, so that answers the question of several
130's behind the same DSL IP,  no need to do anything,  just plug them
in the ports with the defined LAN addresses and ready to use.

For command and control of the REF TEK's you could use RTCC but will
have to do an RTPD connection,  not a direct connection.

If you want to have command and control of the REF TEK's with a direct
connection, you will have to create several NAPT rules for each one of
them at different ports,  same for ftp.

Thanks a lot

Antonio Sanchez
REF TEK Customer Support
http://www.reftek.com
Tel : 214-440-1271





-----Original Message-----
From: anss-netops-bounces at geohazards.usgs.gov
[mailto:anss-netops-bounces at geohazards.usgs.gov] On Behalf Of Dave
Drobeck
Sent: Tuesday, July 05, 2011 3:26 PM
To: sbrewer1 at memphis.edu
Cc: anss-netops at geohazards.usgs.gov
Subject: Re: [ANSS-netops] Operating multiple reftek recorders behind a
single static IP.

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-D
ual-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.
> 
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