The HyperNews Linux KHG Discussion Pages

News: Patch worked...

Forum: The Linux Kernel Hackers' Guide
Re: Question Can you block or ignore ICMP packets?
Re: Feedback ICMP send rate limit / ignoring (Jukka Santala)
Re: More Omission in earlier rate-limit... (Jukka Santala)
Keywords: ICMP ping Internet echo flood
Date: Thu, 15 May 1997 23:04:28 GMT
From: Jukka Santala <>

Just a quick note to report success on that patch ;) Now, doing ping -l 1000 -c 1000 host (Not suggested to test willy-nilly; very effective flood where supported;) only replies to 30 first ping-packets, ignoring the rest (Before the patch I got about 180 replies - does similiar code to tune already exist elsewhere?). Another ping-flood right before earns only two replies, though (Is this correct?). A normal ping with one-second delay goes thu with 0% packet loss. I'd be interested to hear results if anybody dares to try this patching out on a "real" configuration. (I have a very limited PPP account, basically conducting tests over local loopback - oh, and by the way, that PPP breakage wasn't because of my filehandle playing, it was because I had removed resolv.conf for who knows what reasons... increasing fd's up to 4k seem to have worked without problem at least for now;)