unixdigest/openbsd-router-guide
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Add link to OpenBSD mailing list regarding bpf and dhcpd

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unixdigest 2022-04-12 02:53:44 +02:00
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@ -17,7 +17,7 @@
<td>
<h1 class="title">OpenBSD Router Guide</h1>
<h4>Network segmenting firewall, DHCP, DNS with Unbound, domain blocking and much more<br>
<span style="font-size:x-small;font-weight:initial;">OpenBSD: 7.0 · Published: 2020-11-05 · Updated: 2022-04-12 · Version: 2.1.2</span>
<span style="font-size:x-small;font-weight:initial;">OpenBSD: 7.0 · Published: 2020-11-05 · Updated: 2022-04-12 · Version: 2.1.3</span>
</h4>
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@ -807,6 +807,8 @@ table &lt;passlist&gt; { x.x.x.x y.y.y.y z.z.z.z }</pre>
<p>Since bpf provides a raw interface to data link layers in a protocol-independent fashion, all packets on the network, even those destined for other hosts, are accessible through bpf.</p>
<p>See the post <a href="https://misc.openbsd.narkive.com/7SGmbxm0/allow-dhcpd-with-pf">allow dhcpd with pf</a> on the OpenBSD mailing list for relevant comments about this behavior.</p>
<h3 id="logging">Logging and monitoring</h3>
<p>This is an example output from the PF log of blocked attempts to access the external NIC on a setup of mine. I have cleaned out the output a bit and removed some specific data, and 0.0.0.0 is of course not my public IP address, but you already knew that right ;)</p>