Re: "broadcast ping" message
Larry Rosenman <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.mobile |
|---|---|
| Message-ID | <[email protected]> |
--On Wednesday, April 16, 2003 10:58:20 -0700 John Polstra <[email protected]> wrote: > In article <[email protected]>, > Jamie Bowden <[email protected]> wrote: >> On Wed, 16 Apr 2003, John Polstra wrote: >> >> > To make a FreeBSD system respond to broadcast pings, you have to set >> > the sysctl variable net.inet.icmp.bmcastecho to 1. >> >> Shouldn't the default be to DTRT and respond unless disabled? Until now, >> the only systems on my network that didn't respond to broadcast pings >> were my windows boxes, but I consider them broken by default. Why has >> the default behavior changed, and isn't this a POLA issue? > > It was changed for security reasons. Responding to broadcast pings > creates several potential denial of service attacks. It's also against current best practices for ISP's. Even Cisco changed the routers to NOT respond to directed-broadcast by default. The RFC was NOT written for today's internet. Larry Rosenman Sr. Network Engineer Dallas, TX -- Larry Rosenman http://www.lerctr.org/~ler Phone: +1 972-414-9812 E-Mail: [email protected] US Mail: 1905 Steamboat Springs Drive, Garland, TX 75044-6749 _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-mobile To unsubscribe, send any mail to "[email protected]"