Summary

This document describes a configuration for a Packet Filter (PF) firewall, likely related to network security. The configuration uses a series of rules to block incoming traffic based on source IP addresses and network interfaces.

Here's a breakdown of the key points:

* Blocking Rules: The core of the configuration involves a series of rules that use `block drop in quick` to filter network traffic.
* Interface-Specific Rules: The rules are defined for three network interfaces: `em1`, `em2`, and `em3`.
* Network Ranges: Each rule blocks traffic originating from a specific IP address range (e.g., `192.168.1.024` to `192.168.1.255`) coming *through* that interface. The rules target the IP addresses 192.168.1.1 and 192.168.2.1 and 192.168.3.1.
* `em0` Analysis: The output also contains a `tcpdump` log showing traffic passing through an interface named `em0`. This log reveals connections to various IP addresses, predominantly from 45.129.33.4. It shows a high volume of traffic and is likely used for troubleshooting or monitoring. The output indicates many connections to 45.129.33.4 with a variety of source IP addresses, suggesting a potential monitoring or logging process. The `mss` and `tos` fields in the tcpdump output offer additional details about the network traffic.
* General Principle: Each rule is essentially blocking any traffic originating from a specific network subnet and coming in through the designated interface.

Title

OpenBSD Router Guide

Description

OpenBSD Router Guide

Keywords

domain, server, block, have, address, name, network, then, need, servers, port, will, addresses, router, traffic, pass, query

NS Lookup

A 46.183.138.100

Dates

Created 2026-02-15

Updated 2026-02-15

Summarized 2026-03-01