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-rw-r--r--posts/openbsd-router.md14
1 files changed, 13 insertions, 1 deletions
diff --git a/posts/openbsd-router.md b/posts/openbsd-router.md
index 149be72..84bb589 100644
--- a/posts/openbsd-router.md
+++ b/posts/openbsd-router.md
@@ -43,7 +43,7 @@ With all of the hardware on-hand, do the following:
- Plug an ethernet cable from your ISP's modem into the ethernet port on the Mac Mini
- Plug in the USB to ethernet adapter into one of the USB 3.0 ports on the Mac Mini
-- Connect and ethernet cable from the adapter to the main Eero gateway
+- Connect an ethernet cable from the adapter to the main Eero gateway
Diagram for reference:
@@ -99,6 +99,9 @@ int_if = "axen0"
set skip on lo
+# Block everything by default
+block all
+
# Normalize incoming packets
match in all scrub (no-df random-id max-mss 1440)
@@ -131,6 +134,12 @@ set skip on lo
- Skips packet filtering on loopback.
~~~
+block all
+~~~
+
+- Block all sources by default (before telling it what to explicitly allow)
+
+~~~
match in all scrub (no-df random-id max-mss 1440)
~~~
@@ -310,6 +319,9 @@ xbox = "192.168.2.100"
set skip on lo
+# Block everything by default
+block all
+
# Perform source-port randomization for all hosts which are not the xbox
match out log on egress from !$xbox to any nat-to ($ext_if:0) port 1024:65535