Date: Tue, 2 May 2000 21:12:59 -0230 From: "Jeff Gallagher" <jeffg@cs.mun.ca> To: <freebsd-net@freebsd.org> Subject: Help with tweaking the stack and connections in 4.0 Message-ID: <017701bfb490$2684f040$47b02fce@ntc.nf.ca>
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I need a little help here with some aspects of FreeBSD (and perhaps Unix) that I am not real familiar with. I need to change the default TCP window size from 16384 to various other numbers. (Not on the fly of course) What files do I have to change and what do I have to (re)build to make such a change take effect? I also need to increase the total number of simulatanious connections. (Open connections) I am trying to test some networking software and I need to flood the connections on the remote box and right now my FBSD box is dying first - says something like jess: buffer overflow. (Humm, isn't there a DoS attack that does this?) Again what file(s) do I need to modify and (re)build to make such a change. Is there a specific group of files that control the networking portion of the OS that will allow me to tweak some of the other details of the stack? Does anyone off hand have any quantative data on the speed of the TCP stack in FreeBSD. (Url link maybe?) Sorry for the perhaps silly questions, but I am not well versed in the layout and distribution of the FreeBSD sources. I checked LINT to see if some of these were "obvious" kernel options but the only thing close was the ICMP bandwith limiting. Thanks in advance for your help! Jeff Gallagher jeffg@cs.mun.ca To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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