Will an intermediate firewall interfere with IPMI?
Posted on 2004-11-03
I actually have a few questions about IPMI, and have had a very hard time finding good data online. Here we go:
1. Will an intermediate firewall interfere with IPMI? For example, I want to use IPMI to control a server of mine that is on another organization's network. Say they are running a firewall somewhere between me and my server, and allowing only port 80 to reach my system. When I try to contact my server's NIC to accomplish tasks via IPMI, what will happen? If the firewall is a problem, what kind of hole needs to be opened up to solve it? My current understanding is that IPMI used UDP, but no port, as the packets are intercepted before they ever reach the OS. Keep in mind that I'm talking about the IPMI protocol itself, not any particular software that uses IPMI to provide a server management interface.
2. Is there any problem with using IPMI over the Internet via a truly *Local* Area Network (LAN)? I see the term "IPMI over LAN" all over the place, and that makes me nervous. Some things that are available on a LAN (like MAC addresses) are not available over the Internet. Also, does the Internet reliably support IP Multicasting at this point?
3. Does anyone know of good sources of information on *using* IPMI to accomplish server management over the Internet? Mostly all I can find are press releases, hardware, and vague references to "IMPI may be a solution to your problem..."