Mark Damrose wrote: >> -----Original Message----- >> From: Philip Prindeville > >> On the other hand, if, like me, your local address *is* >> unroutable, then it means that you're behind a firewall, and >> need to do a gethostbyname() on your own name to figure out >> what your outside address is (i.e. what the address of your >> firewall is that proxies for you). > > That wouldn't work on my system, and many others. If you do a > gethostbyname() you'll get the local unroutable address back - > since the internal and external DNS for my namespace are maintained > on separate servers.
Hence services like www.whatismyip.com What I think would be really nice is a new kind of DNS record... something like WHOAMI... that provides this kind of a service. So for example dig -t WHOAMI your-friendly-neighborhood-dns-server.example.com would return (in the ANSWER section) the IP address that your-friendly-neighborhood-dns-server sees the request coming from. So if I'm on a 10. intranet cloud, and the DNS server is too, then I'll get back my 10. IP address. Or if I ask a DNS server on the other end of an 192.168. IP-mapped VPN connection, I'll get back the 192.168. IP address it was mapped to. Or if I ask my ISP's server on the internet (but beyond my firewall) I'll get my firewall's routable IP address. -- Matthew.van.Eerde (at) hbinc.com 805.964.4554 x902 Hispanic Business Inc./HireDiversity.com Software Engineer _______________________________________________ NOTE: If there is a disclaimer or other legal boilerplate in the above message, it is NULL AND VOID. You may ignore it. Visit http://www.mimedefang.org and http://www.roaringpenguin.com MIMEDefang mailing list [email protected] http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
