Solved

Firewall or Router problem

Posted on 2012-03-11
5
389 Views
Last Modified: 2012-03-27
This is a strange question so I am not sure how to word it but I will try.

We have a small Network with 2 servers, one Terminal Server and an Exchange 2010 Server.
We have just had a new SQL application installed by a company.
All seems ok but now they want to be able to Telnet our Terminal Server which is where they installed there program using 2 different ports, 444 and 50495. I have set them up using Port Forwarding on the Router which is fine, but now they also want to Telnet this Server/ Application internally as well which is fine except they now want to Telnet this Server/app internally using the external/wan IP.

Im confused, my question is how do I setup the router to Telnet an Internal Server using an External IP Address. He mentions ISA Server, but I dont have an ISA Server.

Any help would be appreciated.
0
Comment
Question by:NWCCSteve
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
5 Comments
 
LVL 37

Expert Comment

by:bbao
ID: 37706850
what's the model of that router?
0
 
LVL 14

Accepted Solution

by:
systan earned 500 total points
ID: 37706898
hi,
Use a switch for the main network producer.

public ip: sample: 12.12.12.1 (wan)
from switch to your router (wan is connected to the switch,  lan is connected to terminal server/OR any server)

public ip: sample: 12.12.12.2
from switch to your server/app (of which this will have a new public ip address, not connected from the router)

So, they want the other server to be standalone as have the public ip address, so they can access it smoothly without problem.

Just got back in EE
Good Luck
0
 
LVL 26

Expert Comment

by:Fred Marshall
ID: 37707035
I may not understand.  It seems that opening a port for SSH would be the thing.  

I would not open my network to telnet in favor of SSH.

You might read this about it:
http://www.dd-wrt.com/wiki/index.php/SSH
0
 
LVL 5

Expert Comment

by:BAYCCS
ID: 37707172
I am not sure of what kind of equipment you are running but in most cases you will not be able to use an external IP internally on your network because of this simple reason. When a workstation sends a request to an external IP the request passes out your router via the outside interface and then would have to come back in that same interface which the router will not allow to happen. Basically you can't go out and back in the same interface.

You would need to setup a domain name for the external IP address and use some form of split dns or dns doctoring that would translate the outside IP to the internal IP automatically.
0
 

Author Closing Comment

by:NWCCSteve
ID: 37774446
Thanks Systan
0

Featured Post

Ransomware: The New Cyber Threat & How to Stop It

This infographic explains ransomware, type of malware that blocks access to your files or your systems and holds them hostage until a ransom is paid. It also examines the different types of ransomware and explains what you can do to thwart this sinister online threat.  

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I have put this article together as i needed to get all the information that might be available already into one general document that could be referenced once without searching the Internet for the different pieces. I have had a few issues where…
Lync meeting or Lync conferencing is what many organizations would like to deploy to allow them save money. But companies are now giving up for various reasons, one of which is that they cannot join external meetings (non-federated company meetings)…
Viewers will learn the different options available in the Backstage view in Excel 2013.
The viewer will learn how to create a normally distributed random variable in Excel, use a normal distribution to simulate the return on an investment over a period of years, Create a Monte Carlo simulation using a normal random variable, and calcul…
Suggested Courses

626 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question