Date: Wed, 11 Jul 2001 16:16:57 +0800 From: Kelvin Ng Chee Hoong <nchee_hoong@pacific.net.sg> To: Joseph Gleason <clash@tasam.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Minimize ICMP packets Message-ID: <3B4C0B79.E91DA46C@pacific.net.sg> References: <3B4BFCE8.3EE5720@pacific.net.sg> <008801c109d8$eb40e850$0b2d2d0a@battleship> <3B4C0AB9.8FFC7181@pacific.net.sg> <001b01c109e0$dda90350$0b2d2d0a@battleship>
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You are right . Joseph Gleason wrote: > Humm...I beleive net.inet.icmp.icmplim is to limit the rate in packets per > second of ICMP not the size. I'm not sure how to limit the size.... > > ----- Original Message ----- > From: "Kelvin Ng Chee Hoong" <nchee_hoong@pacific.net.sg> > To: "Joseph Gleason" <clash@tasam.com> > Cc: <freebsd-questions@FreeBSD.ORG> > Sent: Wednesday, July 11, 2001 04:13 > Subject: Re: Minimize ICMP packets > > > Hi Joseph ; > > First of all , thank you very much for your information. I've set > variable > > of icmplim to 30 but this variable seems does not limit the ICMP packet > size > > to max 30 bytes. > > When I did a ping to my FBSD machine with packet size of 18024 bytes, it > still > > accept the larger ICMP packets rather than to discard . > > > > Joseph Gleason wrote: > > > > > kernel option: > > > options ICMP_BANDLIM > > > > > > Does this. It is default in generic. > > > > > > I am not certain of this but I assume sysctl variable > net.inet.icmp.icmplim > > > controls the ammount it lets through. Someone want to confirm or deny > this? > > > > > > Joe Gleason > > > > > > ----- Original Message ----- > > > From: "Kelvin Ng Chee Hoong" <nchee_hoong@pacific.net.sg> > > > To: <freebsd-questions@FreeBSD.ORG> > > > Sent: Wednesday, July 11, 2001 03:14 > > > Subject: Minimize ICMP packets > > > > > > > Hi ; > > > > I want my FBSD machine to accept ICMP packets (ping) from source > > > > anywhere , but limited to number of ICMP packets size and number of > > > > connection ping concurrently . Any ICMP packets that beyond the > > > > criteria will be discarded . > > > > > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > > > with "unsubscribe freebsd-questions" in the body of the message > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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