Date: Fri, 13 Dec 2002 19:55:55 -0800 From: Steve Kargl <sgk@troutmask.apl.washington.edu> To: Jimi Thompson <jimit@myrealbox.com> Cc: current@FreeBSD.ORG Subject: Re: TTL Message-ID: <20021214035555.GA11067@troutmask.apl.washington.edu> In-Reply-To: <JBEBLBLAABEOPMEPFAKEIEHKCCAA.jimit@myrealbox.com> References: <Pine.BSF.4.21.0212131718150.37808-100000@root.org> <JBEBLBLAABEOPMEPFAKEIEHKCCAA.jimit@myrealbox.com>
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On Fri, Dec 13, 2002 at 09:14:06PM -0800, Jimi Thompson wrote: > > > This is an issue that we recently ran into at work and I wanted to mention > this since 5.0 isn't released yet. I don't know if FreeBSD has addressed > this or not but thought it should be mentioned just in case. We've > discovered that in many *nix OS's the TCP stack sets the default TTL for > packets to 30. Apparently, IBM (AIX) had not and our research showed that > most of the other *nix OS's hadn't either. > > With the increasing complexity of the internet, this is often a problem for > those who have large internal networks and/or live in Australia. 30 hops > often isn't enough to make to the core DNS. It probably ought to be > extended to something more realistic. The other numbers that I've seen used > 64, 128, and 256. > troutmask:sgk[202] sysctl -a | grep -i ttl net.inet.ip.ttl: 64 -- Steve To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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