using multiple static ip's on multiple applications

[adrianleo]

I have a very important question:
How do I use multiple static ip's on a single application? How can I set the IP's so that each time I access the application, be it a browser, it reads a different IP from the ten? And let's say that if I open ten of these browser pages, all ten have ten different IP's?
Thank you in advance.

[ua549]

AFAIK the only way to do what you want is via custom programming.
Normal applications do not have any control over networking functions.

One can control which static IP is used via a routing table. That implies multi-homing. Keep in mind that multiple IP's on the same box on the same network violates the ip protocol.

[adrianleo]

AFAIK the only way to do what you want is via custom programming.
Normal applications do not have any control over networking functions.

One can control which static IP is used via a routing table. That implies multi-homing. Keep in mind that multiple IP's on the same box on the same network violates the ip protocol.
Thanks for answering.
So, programming is most likely the best/only way to go... Any reference material you could point me to for help for this issue? Again, thank you.

[ua549]

What are you trying to accomplish with the multiple IP addresses?
Perhaps there is another way to reach your end goal.

[adrianleo]

I'll try to put as best as I can: I'm trying to access a website that has an online chat client and login with multiple users. Once I login with a single user, it doesn't allow me to login with another. I've tried using a public web proxy server as a middleman, but no success.

[adrianleo]

From two different IP's I can login with two accounts, so I'm assuming that if I can have two or more IP's on a single computer, then I could, theoretically, login with two or more accounts.

At least that's what I'm thinking.

[ua549]

A routing table solution will not work since the target destination is the same.

I find it a bit unusual that the online chat is limited to a single IP since there can be hundreds of users behind a single public IP address because of NAT and private IP addressing used behind firewalls. The limit is more likely to be based on the user. A user can only log in once. That is a normal restriction.

[adrianleo]

So you're saying that there is absolutely no way to do this?

[ua549]

In essence yes. What I understand that you wish to do is have a single user log in multiple times concurrently to a single site site for some purpose. I fail to see what purpose this will serve that a single log in cannot.

[adrianleo]

No, no, sorry if I wrote it wrong. I meant I want multiple users to log in at the same time from the one computer.
Let's say I've logged in with x1 as a user. I can't log in with x2 because I'm forwarded back to x1.
How can I make x1 and x2 log in at the same time? Two users log in on the same time from the same computer?
That's what I've been trying to do. That's what I've been failing to do.

[adrianleo]

If I log in from two computers at the same time with one user on each of course it works. And as these two computers have different static IP's, I'm asking how I can make one single computer use both IP's and log in with the two users?

[ua549]

What is the OS? Windows is a single user at a time machine.
Are you having troubles with *nix machines?

I have never had trouble logging in with different users from the same machine at the same time using the same IP address. I do it frequently. As a test I am logged into this site with 2 different users from the same computer. I can also log in multiple times from the same computer using the same user ID.

Whatever problem you are having it is not related to the IP address unless the site you are connecting to controls on IP addresses, a very unusual situation.

[adrianleo]

OS is Windows.
Assuming that the site controls on IP adresses, how would I go doing what I want?

[ua549]

I don't believe you can do it.

[rahulpsharma]

I am new to this forum and quite a novice in IT concepts so pardon me if my question sounds too basic...... I have two questions:

1) Like the initiator of this thread, I wish to configure my PC so that it has two Static IPs...... I am running Win XP, My PC has one LAN Card and one ISP cable running into my LAN Card......

So far, my connection is dynamic and each time I log in, I get a new IP..... So I wanted to get a static IP from my ISP..... I called up the ISP helpline and requested to provide me a Static IP and the question from the ISP was "if I need One Static IP or Two"...... I am a bit surprised by the question, what if I had opted for Two Static IPs..... How would I be able to configure two static IPs on my PC with single LAN Card...... Is it possible or was the person at the helpdesk ignorant to ask me such a question...... I would be really happy, if I could opt for two static IPs cos I often access my PC remotely and as I am running a ftp/http service on my PC, I can download and upload files from anywhere......

2) My second question is:
I have an internet broadband connection of an ISP, say X...... Now I each time, I am assigned a dynamic IP when I start my PC...... The IP has a form a.b.c.d.......!!!... Surprisingly, I am able to Ping my IP and get a reply from anywhere in the world as long as my PC is on......!!!! Does it mean that my ISP has given me a global IP.....??

I would have expected my PC to be behind a proxy or some kind of a distribution network at the ISP end.......... So if someone would try to ping my IP, it should not be found on the global addresses.......

When I configure, say ten PCs within a network, I expect one main incoming IP from an ISP and the other ten PCs getting some connected via a router/distribution mechanism with addresses like 192.168.x.y and if someone would try to ping 192.168.x.y from outside world, this would just not be available.......

I would have expected a similar architecture between my ISP and my PC also...... But my PC's IP Pings from anywhere in the world...... How has the ISP managed to give so many subscribers so many global IPs.....!!!!

Thanks in advance.....

au revoir
Rahul P Sharma

[ua549]

In reply to your first question, two IP's on a single PC is not of any benefit to you unless you need to connect to separate networks. That is not the case you describe.

Second, the IP assigned to you by your ISP whether it is static or dynamic is a public address that is accessible from anywhere. If you are connected through a router the IP from your ISP is assigned as the public address in the router. The router also has a private IP address in one of the specific ranges reserved for that use. Typically that IP is in the 192.68.0.0 address space, but there are others. PC's on your private network are assigned a private IP address via DHCP or by you manually. The router (or other DHCP server) takes care of mapping the private IP to the public IP.