Solved

Telnet from a 2nd or 3rd IP address from 1 NIC

Posted on 2015-01-12
4
186 Views
Last Modified: 2015-01-23
I am needing to test for open ports on specific IP addresses. I have one physical NIC with 4 IP's. One internal IP and 3 external facing IP's (Lync Edge 2013).

I need to be able to telnet to specific ports from specified IP addresses. How do I accomplish this? Please be detailed and specific please. I can view my routing table but Im not sure 100% at what I am looking at or perhaps need to change.
0
Comment
Question by:Group_007
  • 2
  • 2
4 Comments
 
LVL 8

Expert Comment

by:Steven Sheeley
Comment Utility
Are you looking to test to see if ports are open on your external IP addresses?  From an external machine merely open a command windows and type

telnet [IP Address] [Port]

If the connection times out or is refused then you have a blocked port, if the window clears and you are left with a blinking cursor in the upper left corner then the machine in question has accepted the connection, the port is open.
0
 
LVL 1

Author Comment

by:Group_007
Comment Utility
Yes, I have three external IP's and these IP's are should be setup to allow certain ports. Some ports are bidirectional whereas other are not.
0
 
LVL 1

Author Comment

by:Group_007
Comment Utility
Let me clear this up a bit, my mistake. When I say external IP's I really meant IP's that are in our DMZ. These IP are then NAT's to public IP's. The IP;s that I need to verify the the external facing DMZ IP's. The public IP's I can verify...
0
 
LVL 8

Accepted Solution

by:
Steven Sheeley earned 500 total points
Comment Utility
If they are NAT'd then you should pass through the public IP's into the DMZ IP's, Your traffic should flow as any normal traffic would flow in the case of traffic to and from the edge.

If everything is working, and I have done this myself, if you telnet to the public IP on the specified port, if everything is working you'll get a connection.
0

Featured Post

Free Gift Card with Acronis Backup Purchase!

Backup any data in any location: local and remote systems, physical and virtual servers, private and public clouds, Macs and PCs, tablets and mobile devices, & more! For limited time only, buy any Acronis backup products and get a FREE Amazon/Best Buy gift card worth up to $200!

Join & Write a Comment

Every now and then, Microsoft does something that totally impresses me. It doesn't happen often, but in this case I must say I am thoroughly impressed with Windows Server Backup. One of the long time issues with Windows Backup has been the ability t…
A procedure for exporting installed hotfix details of remote computers using powershell
In this Micro Tutorial viewers will learn how to use Boot Corrector from Paragon Rescue Kit Free to identify and fix the boot problems of Windows 7/8/2012R2 etc. As an example is used Windows 2012R2 which lost its active partition flag (often happen…
This tutorial will walk an individual through the process of installing of Data Protection Manager on a server running Windows Server 2012 R2, including the prerequisites. Microsoft .Net 3.5 is required. To install this feature, go to Server Manager…

763 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

Need Help in Real-Time?

Connect with top rated Experts

11 Experts available now in Live!

Get 1:1 Help Now