Date: Thu, 4 Jun 2015 19:54:35 +0300 From: Kimmo Paasiala <kpaasial@gmail.com> To: Matthias Apitz <guru@unixarea.de>, FreeBSD Net <freebsd-net@freebsd.org> Subject: Re: unknown UDP caused by dhclient Message-ID: <CA%2B7WWSeruDvKRVgSj9xk2OvwQB8rfYrD6PegVsCqdM5GGtpVdg@mail.gmail.com> In-Reply-To: <20150604073100.GA2012@c720-r276659> References: <20150604073100.GA2012@c720-r276659>
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On Thu, Jun 4, 2015 at 10:31 AM, Matthias Apitz <guru@unixarea.de> wrote: > > Hello, > > I'm seeing in my firewall log unknow UDP traffic which is caused by the > running dhclient: > > Jun 3 21:57:02 c720-r276659 dhclient[2601]: send_packet: Network is unre= achable > Jun 3 21:57:02 c720-r276659 ipmon[2368]: 21:57:02.751350 ue0 @0:82 b 10.= 42.0.83,68 -> 10.42.0.1,67 PR udp len 20 328 OUT > Jun 3 21:58:38 c720-r276659 dhclient[2601]: send_packet: Network is unre= achable > Jun 3 21:58:38 c720-r276659 ipmon[2368]: 21:58:38.753118 ue0 @0:82 b 10.= 42.0.83,68 -> 10.42.0.1,67 PR udp len 20 328 OUT > > What is my dhclient asking from the router 10.42.0.1? Should I open the > ipfilter for this? > > The system is r276659. > > Thanks > > matthias > -- > Matthias Apitz, guru@unixarea.de, http://www.unixarea.de/ +49-170-4527211= +49-176-38902045 > "Wenn der Mensch von den Umst=C3=A4nden gebildet wird, so mu=C3=9F man di= e Umst=C3=A4nde menschlich bilden." > "Si el hombre es formado por las circunstancias entonces es necesario for= mar humanamente > las circunstancias", Karl Marx in Die heilige Familie / La sagrada famili= a (MEW 2, 138) That is how a DHCP client ask for lease renewal from the DHCP server, you should allow the traffic if the interface in question is configured to use DHCP. -Kimmo
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