Date: Fri, 13 Dec 2002 22:21:28 -0500 From: Ray Kohler <ataraxia@cox.net> To: Jimi Thompson <jimit@myrealbox.com> Cc: current@freebsd.org Subject: Re: TTL Message-ID: <20021214032128.GA85760@arkadia.nv.cox.net> 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. I'm not completely sure but I believe the default TTL on 5.0 is 64. I've briefly tested this by pinging myself and watching the output, but if there are any special cases for that then I could very well be wrong. -- Ray Kohler <ataraxia@cox.net> Those who do not understand Unix are condemned to reinvent it, poorly. -- Henry Spencer To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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