Sorry for two replies, James. I forgot to hit reply-all.
Thanks for the response.
Well, I was hoping not to have to open ports to the world. I am a
scientist. I will be using an Android app called unified remote (1) to
control experiments running on the desktop. In order to setup the server
for this app, ports 9512/tcp, 9512/udp, and 9511/udp need to be open. I
was assuming that because I would be using two adapters, security would
not be an issue. That is, the adapter that would have the ports open
would be connected to the switch, which won't be accessible by anyone
but me (over wifi). The adapter providing access to the world would not
have the ports open.
Perhaps I don't have a complete understanding of this setup?
Chris
(1) https://www.unifiedremote.com/
On 03/30/2017 03:21 PM, James M. Pulver wrote:
> This sounds like a bad idea - just wanting to get yourself in trouble.
> Let's take a step back, what are you trying to do from the tablet that
> you need open ports to the world for? Have you considered using a
> remote access system like Anydesk that uses a cloud connection broker
> of sorts so the host and client both call out to a cloud server to set
> up the direct connection so neither computing device you use needs
> ports open?
>
> James Pulver
> CLASSE Computer Group
> Cornell University
>
> On 03/30/2017 02:53 PM, Brown, Christopher A wrote:
>> Hi list users,
>>
>> I am not a network administrator and know only a little bit about the
>> topic. I need to set up a switch in my lab, so that I can have a wifi
>> access point and an SL7 desktop computer on the same network, as I need
>> to be able to connect to the pc using a tablet. My administrator does
>> not allow switches to be on the network, so I need two network adapters
>> on my desktop, one for internet, and on on the local switch.
>>
>> I tried a nominal setup at home first, with my home wifi access point,
>> router/switch and using only a single adapter. I managed to open the
>> required ports using firewalld, and my setup works great at home, where
>> I can connect a tablet over wifi and access my desktop as I need. The
>> only problem I see there is that the ports I opened are open to the
>> world, but since that was temporary for testing, it was fine. They are
>> now closed.
>>
>> I bought a usb ethernet adapter, which shows up as a network interface
>> on my lab computer. I now need to configure my lab computer as follows.
>> I would like the onboard network adapter to be the default (used for web
>> browsing etc), and use default settings (public zone, etc). And I would
>> like the new usb network adapter to have the required ports open, so
>> that I can access that computer over wifi with my local switch.
>>
>> As I said, I have used firewall-cmd to open and close ports. I know a
>> little bit, but not enough to accomplish what I describe above.
>>
>> Can anyone help with this? Just let me know if more information is
>> needed.
>>
>> Thanks,
>> Chris
>>
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