Date: Fri, 1 Dec 2006 14:21:28 -0600 From: Josh Paetzel <josh@tcbug.org> To: freebsd-questions@freebsd.org Cc: Wasp King <waspking2003@yahoo.com> Subject: Re: stop a freebsd server from responding to pinging? Message-ID: <200612011421.28431.josh@tcbug.org> In-Reply-To: <CD86A958-48D7-4C00-83FD-3242B75661C7@mac.com> References: <365084.23607.qm@web37213.mail.mud.yahoo.com> <CD86A958-48D7-4C00-83FD-3242B75661C7@mac.com>
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On Thursday 30 November 2006 13:10, Chuck Swiger wrote: > On Nov 30, 2006, at 10:55 AM, Wasp King wrote: > > 1. How do I stop others from port scanning a server? > > Marcus Ranum suggests using wirecutters on the ethernet cable. > If the server is internet-reachable, then it can be port-scanned. > > Less drastic measures than removing it from the network entirely > would including configuring a firewall to block all ports except > those absolutely required for the necessary functions which the > machine needs to perform, and "hardening" the OS to reduce the > potential exposure. > > > 2. is stopping the response to pinging enough? > > No. > > > 3. how to do I stop the server from responding to pinging? > > Use a firewall like ipfw or ipf to block ICMP traffic types 0 & 8: > > ipfw add 1 deny icmp from any to any icmptype 0,8 I find it a tad ironic that someone running FBSD 4.2 is worried about getting port scanned.....or maybe that's why he is worried, since the laundry list of exploits and holes against a box running something that old and unsupported is fearsome. -- Thanks, Josh Paetzel
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