Re: "broadcast ping" message
Larry Rosenman <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.mobile |
|---|---|
| Message-ID | <[email protected]> |
--On Wednesday, April 16, 2003 11:33:31 -0700 Jamie Bowden <[email protected]> wrote: > On Wed, 16 Apr 2003, Larry Rosenman wrote: > >> --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. > > Then submit a draft for a superceding RFC, don't ignore it just because > it's inconvenient. That's a Microsoft attitude. Take it up with the NSP folks. I've not written standards stuff, and this is now a Best Current Practices. I've had my share of DDoS's from broadcast pings. It's NOT JUST ME, it's the ENTIRE ISP Community. LER > > Jamie Bowden > > -- > "It was half way to Rivendell when the drugs began to take hold" > Hunter S Tolkien "Fear and Loathing in Barad Dur" > Iain Bowen <[email protected]> > -- 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]"