Thanks David, I've taken the problem up with the distro forum, and hope to resolve it. Stephen. > Message: 1 > Date: Tue, 12 Feb 2013 10:51:57 -0700 > From: David Breakey <[email protected]> > To: [email protected] > Subject: Re: Check if my IP address has changed ? > Message-ID: <[email protected]> > Content-Type: text/plain; charset="iso-8859-1" > > Even if it's not possible to do this directly in Monit, you should be > able to hook into the interface management scripts (I believe a post > ifup hook should be able to check whether the IP address is what you > expect, and take whatever corrective action is deemed suitable; how to > do this is utterly dependent on your distro). > > However, why are you needing to do this? If you're using a static IP, > then this shouldn't be an issue to begin with, unless there's something > wrong with your system's interface management scripts--and if you're > using DHCP, then assigning a "static" IP is the responsibility of the > DHCP server, not the client. > > Enterprise-class routers support static leases, where the DHCP > server compares the MAC address to a fixed list and, if found, > assigns the IP address in the list, rather than the usual > round-robin approach. Typically, these "fixed" addresses are outside > the normal DHCP range. Very handy when you want the convenience of > DHCP, with the utility of fixed addresses (I use DHCP almost > exclusively at home, with a short lease time; if I need to change > network infrastructure--DNS, NTP, etc--I just reconfigure the DHCP > server and it will hand out the new information when the leases are > renewed, while preserving fixed IP addresses). > > I *never* configure network-critical servers this way; they are > /always/ statically configured, but I only have one /critical/ > server in each of the networks I am responsible for (small > networks). > > If you're using a home or home-office router, then you're > /generally/ out of luck (commercially, this is considered a > "premium" feature), unless you replace the firmware with something > like OpenWRT (as I've done). If you decide to do this, check > carefully that OpenWRT is compatible with your router hardware first. > > Or, run a standalone DHCP server that supports it; /dnsmasq/ handles > this quite nicely if I recall (same software that OpenWRT uses, I > think).
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