Am 03/07/2011 05:49 PM, schrieb Sean Carolan: >> First, if your host is actually communicating with any kind of ip-based >> network, it is quite certain, that 127.0.0.1 simply isn't his IP >> address. And, at least for me, that's a fairly good reason. > > Indeed. It does seem like a bad idea to have a single host using > loopback, while the rest of the network refers to it by it's real IP > address. Acknowledged. At least it will save you a lot of time next year, when you have forgotten about that and are wondering why every machine on the network can reach a service and only the host itself can't (or vice versa...). >> Second, sendmail had the habit of breaking if your hostname was mapped >> to 127.0.0.1, but I stopped using sendmail a decade ago, so I can't >> verify this. :) > > The reason this came up is because one of our end-users requested such > a setup in the /etc/hosts file, and I didn't think it was a good idea. > Seems it would be better to fix the application(s) that require the > data to use the real network IP address. Most of the time it's a good idea to fix applications before ravishing your network setup to make it work. :)