We'll have to leave this at disagreement.
Here we go again...Yeah, but if you are going to use a hosts file, you wouldn’t use an IP address to access the modem. You would use the host name! Otherwise, it’s not smart.
If the browser can’t do that it’s worthless...The problem seems to be that the browser is NOT recognizing the IP address as an IP address. You say it should... But it doesn’t. This problem is not unique to the TS.
That’s basically what placing a name the host file does except its used locally and doesn’t require DNS.So give the modem a DNS name and always access it with that name. What’s wrong with that?
Obviously, you don’t understand what I said.Here we go again...
If the browser can’t do that it’s worthless...
That’s basically what placing a name the host file does except its used locally and doesn’t require DNS.
Sorry...Its hard for me to understand what you don't properly explain.Obviously, you don’t understand what I said.
It does contribute....It means it isn't the browser.Saying a browser is worthless contributed nothing to the discussion nor does it change reality.
Yes.....Perhaps you like to explain how to give it a DNS name?Did I say anything about requiring DNS?
Nice experience....congratulations..I aced the networking certification exam. I designed/ built/ maintained a $20M/month e-commerce site that broke the network down into 7 sub networks separated by redundant firewalls and redundant application layer firewalls. With redundant routers and switches in a three tier network design. It passed the strictest PCI DSS certification level (the same that banks and financial institutions must meet). Met 99.999% uptime contractual requirements. Also, duplicated the entire environment on the west coast in a warm server site. All transactions were duplicated on both coasts in real time. All the while processing 30,000 transactions/sec.
Just curious. What are your qualifications?
I’ll be nice and agree to disagree as well.
because I THINK it's an easy question.So, first problem ... unplugged the Ethernet cable from my computer and plugged it into the cellular modem. Typed the address given to me in the manual in Firefox and got to the modem with no problems.
Then I added the Ethernet switch ... my computer to the switch to the modem. Now I can't talk to the modem ... why?
I know the switch works (tried it between my computer and my cable modem ... works fine).
I agree with eetech00. But, the port you use isn’t arbitrary. It depends on what you want to do between the PLC and Touch Pad. If it’s strictly browser access, then port 80 will work (http: protocol is by default on port 80). If it’s RDP, then you need port 3389 open. Or any other standard service, you’ll need the assigned port open.So, are you saying that when I want to connect my PLC and Touch panel to the cellular modem, I should use port 80?
In the example, they use "private" vs "public" ports.
The private ports are all "80" and he public ports all different "81", "82". "83", ....
If "80" is the right port ... can I just put all the ports (all public and private ports) in the NAT table as "80"?
Thanks again ..... Mike
That’s correct. You got it so far.I looked up a table of port addresses on Wikipedia ... I think it all makes sense.
So I will need to know (say for the touch screen) 1) what the internal ip address is and 2) what protocol they are using to communicate with the touch screen.
Just for the sake of arguments, lets say it was http ... then I would choose port 80.
It this correct?
You should be fine when sending messages on an outbound connection, all communication occur using that initial session.Now just one question ... the PLC and touch screen can both send out e-mail alerts.
They are "sending", not receiving e-mails. Do I still need to put them in the NAT table?
If I do then I would enter their internal IP and put them on port 25 (or 2525 or 587 or 465 ... have not figured out why so many e-mail ports yet)?
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by Jake Hertz
by Jake Hertz