?
Solved

How to map public ip address to private ip address

Posted on 2006-07-13
3
Medium Priority
?
510 Views
Last Modified: 2013-12-14
I have 4 publice ip addresses. One of this is being used for NAT for my internal network to access internet. I want to setup a ftp server so that my staff can access this from outside office. I use a normal Linksys router. Can I configure this and how do I go about this.
0
Comment
Question by:slgmy
[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
3 Comments
 
LVL 54

Accepted Solution

by:
b0lsc0tt earned 1500 total points
ID: 17110599
slgmy,

Most likely the router will call it "port forwarding."  FTP uses port 21 by default but you would set up the router to allow the FTP port through and let it know which computer to forward it to.  Test that the FTP server is running inside your network by attempting to connect from another computer in your network using the server's local (i.e. private) ip address.  That is the ip address you would use in the router for the FTP port.

Let me know if you have any questions or need more information.  Please provide the specific model of Linksys router if you would like more details.

b0lsc0tt
0
 
LVL 6

Expert Comment

by:gkumaran
ID: 17113692
You can use the Port Fowarding.. for Port 20 and 21, which would enable people from the Outside office to access the FTP server using the (one) Public IP address, to which the Router been configured.

Some Router has Global Mapping, which would provided the return traffic.. (the intial traffic is from to the main public IP address).. in rest of the 3 IP address. However I doubt if this is available in a Normal Linksys Router.

The better option is to buy Router with multiple WAN Slots, and configure any of the other IP exclusively for the FTP Server (this also involves Port Forwading).. however you have control over the bandwidth, and bit of security as you are not gonna to use the main Public IP address.
0
 
LVL 27

Expert Comment

by:pseudocyber
ID: 17121449
You need a router which is capable of Static NAT - meaning you take one outside address and NAT it to one inside address, which is exactly what you want to do.  Your Linksys can't do it.

You could get a Cisco SOHO 90 series router which can do it - probably for less than $300.

http://www.cisco.com/en/US/products/hw/routers/ps4866/products_data_sheet09186a008010e5c4.html
0

Featured Post

Get free NFR key for Veeam Availability Suite 9.5

Veeam is happy to provide a free NFR license (1 year, 2 sockets) to all certified IT Pros. The license allows for the non-production use of Veeam Availability Suite v9.5 in your home lab, without any feature limitations. It works for both VMware and Hyper-V environments

Question has a verified solution.

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

    Over the past few years, small business and home owners have become so dependent on internet that a need for redundancy has arisen.    What happens when your small business or home / home office loses its internet connection?  The results c…
Why do some people recommend buying business VoIP from an ISP? What are the benefits to my company? What are the costs?
Do you want to know how to make a graph with Microsoft Access? First, create a query with the data for the chart. Then make a blank form and add a chart control. This video also shows how to change what data is displayed on the graph as well as form…
In this video, Percona Solution Engineer Dimitri Vanoverbeke discusses why you want to use at least three nodes in a database cluster. To discuss how Percona Consulting can help with your design and architecture needs for your database and infras…
Suggested Courses

765 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