Date: Wed, 08 Nov 2000 17:30:53 -0500 From: Jan Knepper <jan@smartsoft.cc> To: FreeBSD Security <freebsd-security@freebsd.org> Subject: loopback: 127.0.0.0/8 or 127.0.0.0/16 or 127.0.0.0/24??? Message-ID: <3A09D41D.B14D809C@smartsoft.cc>
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Hi! I have been monitoring some network traffic lately and figured that at a certain moment my system wanted to send a package out to 127.0.0.2:25 via the interface that is connected to the internet (the external interface). Actually, my firewall blocked the packets, but I wondered why the heck it would try something like that to begin with. Next to that I wondered, since 127.0.0.0/8 is the loopback interface what is really going on and wether or not packets to or from 127.0.0.0/8 traveling through the external interface should be blocked or not. Should it be something else than 127.0.0.0/8 (/16? /24?). I know there are unregistered IP ranges RFC1918, but I didn't read anything about 127.0.0.0... Can anyone shed any light? Jan -- Jan Knepper Smartsoft, LLC 88 Petersburg Road Petersburg, NJ 08270 U.S.A. http://www.smartsoft.cc/ http://www.mp3.com/pianoprincess Phone : 609-628-4260 FAX : 609-628-1267 FAX : 303-845-6415 http://www.fax4free.com/ Phone : 020-873-3837 http://www.xoip.nl/ (Dutch) FAX : 020-873-3837 http://www.xoip.nl/ (Dutch) In God we Trust -- all others must submit an X.509 certificate. -- Charles Forsythe <forsythe@alum.mit.edu> To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
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