how to determine the outgoing IP address?

Dru_Hix

Does anyone know how to determine the outgoing IP address of a socket?

AstroTeg

The outbound socket will either be a URL or an IP. If its a URL, then you can look up DNS and get the IP that way. You may also take a look at [man]socket_getpeername[/man].

Dru_Hix

I'm sorry, I'm trying to change the outgoing IP on my server.
I don't want to use the server's primary IP when connecting to other websites.
Is there anyway I can (for example) have fsockopen connect to one of the server's virtual IPs and use that as the outgoing IP?
Basicly using the server's IPs like you might use a proxy.

AstroTeg

With virtual hosting, there's only 1 IP address assigned to the server. So you're going to be stuck with that IP (assuming that's how your server is setup). The only thing I can think of you can do is set it up to hit another proxy and that would result in your app using the proxy's IP address.

Dru_Hix

Let me better explain what Im trying to do.

I have a few dedicated servers, each with many IPs.
The primary IP is the default outgoing IP and also the IP assigned to the server. The server has many "virtual" IPs binded to it.
So when you connect to a virtual IP it goes to the server.
I've heard of programmers connecting sockets (maybe UDP) to these additional local IPs then using them to connect to other servers.
So they can (for an example) set aside some IPs to use with different scripts and monitor activity.

"Public" Proxy servers fail, can be slow at times and you can't track outgoing activity.

AstroTeg

For outbound traffic, you're going to be found to the IP address assigned to the NIC you're doing business on. Sure, if you have additional IPs the server is listening for, you could setup socket listeners on those IPs. But to go outbound on those IPs would be a bit tough since the NIC involved is not doing business as those IPs.

The only other thing I can think of is to try setting up a proxy server (either local or remote) and doing business through that...