Date: Mon, 3 Oct 2016 08:35:13 -0700 From: Michael Sierchio <kudzu@tenebras.com> To: Mark Tinka <mark.tinka@seacom.mu> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: UDP Traceroute on FreeBSD Message-ID: <CAHu1Y70V9dOW_K98exhXa6_7nHuWK=V_MCmvyw=_RkOE4QNq1w@mail.gmail.com> In-Reply-To: <76dab24c-6c16-4935-779a-a9ef65df8d18@seacom.mu> References: <76dab24c-6c16-4935-779a-a9ef65df8d18@seacom.mu>
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On Mon, Oct 3, 2016 at 5:52 AM, Mark Tinka <mark.tinka@seacom.mu> wrote: > > Can anyone tell me whether FreeBSD is able to respond to traceroute > packets transported over UDP? > Absolutely, yes - unless firewall rules drop stray UDP packets inbound, or the kernel parameter net.inet.udp.blackhole is set to 1. Also note that traceroute only yields the expected behavior (an ICMP PORT_UNREACHABLE which terminates the trace) if nothing is listening on the selected port on the IP address you're tracerouting to. --=20 "Well," Brahma said, "even after ten thousand explanations, a fool is no wiser, but an intelligent man requires only two thousand five hundred." - The Mah=C4=81bh=C4=81rata
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