Serial over Ethernet module selection

[Charlie]

Wrong, I have several servers behind NATs on different ports on different LANs.
Wrong again. If the device is on a port other than 80 for http request all you have to do is add a ":" then the port number. abc.com:1234
Now you are getting it! Yes, a port is a port as far a working, it is more to do with security audits. And yes, some hosting companies block 25, 80, and others.
Then you should not have any problems. Unless you are crossing different sub nets... but that is another story... Contact your IT department if that is the case.

Dave, I think we've hijacked this thread enough. However, simply saying I'm wrong, then describing a situation different in detail from what I was stating, really isn't helping anyone understand. Routing and security is complex business - we can agree on that. There are many ways to skin a cat. I'm sure yours works for you as well as mine does for me. I was just trying to understand yours and maybe learn a new method. And I work in IT, so calling them (as you've told me twice) means calling myself or one of my colleagues.

[amgen]

Dave, I think we've hijacked this thread enough

sorry,
from Linux and security classes I took, routers, switches, and other devices with various operating systems....can be set up (in configuration files) regarding security to:
block all but.....
allow all but.....
combinations of both depending on which rule is first or last....
and I would say port 80 is for web pages served, and having an odd port for other stuff (pic) would be less a security risk since when hackers scan IP's for vulnerabilities, they would try some or more of the "well known assigned ports" (generally 0 to 1000) for access and less likely to try all 65000 since that kind of scan is more detectable to security software......and when several or many devices are installed in a LAN that you want to access from outside, you would naturally use different ports....(even with IPV6 I believe)
don (2 cents)