hostname and dhcp

Evan Dower evantd at
Thu Feb 12 09:58:07 PST 2004

I've actually been running FreeBSD for quite a while now, but I've never 
known exactly how to handle this. In rc.conf, one must specify a hostname. 
If you're using DHCP to set up your network though, your FQDN (fully 
qualified domain name) can change without notice. It seems like a Good Idea 
to have your hostname be your FQDN, since some things will do a reverse 
lookup on your IP to verify that it matches the hostname you supplied. In 
particular I'm thinking of SMTP servers here. (send-pr doesn't work for me 
because my mail gets rejected.) So, when you're autoconfiguring your network 
interfaces, what should you put in rc.conf's hostname variable? Is there 
something else I can do that would allow me to have something nicer looking, 
but still send my FQDN when asked?
Thanks very much,
Evan Dower
Undergraduate, Computer Science
University of Washington
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